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- Subject: Start
- From qrp-request@Think.COM Sat Jan 22 01:26:09 1994
- Return-Path: <jherman@uhunix.uhcc.Hawaii.Edu>
- id AA02668; Fri, 21 Jan 94 20:26:02 HST
- id AA24080; Fri, 21 Jan 94 20:25:52 HST
- Date: Fri, 21 Jan 94 20:25:51 HST
- From: Jeff Herman <jherman@uhunix.uhcc.Hawaii.Edu>
- To: QRP@Think.COM
- Subject: PROJECT 14: THE WORLD'S SMALLEST TRANSMITTER
- Message-Id: <CMM.0.90.2.759219951.jherman@uhunix3.uhcc.Hawaii.Edu>
-
- Gang,
- If there was a contest to come up with a xmtr containing as few
- parts as possible, this would be the winner: 10 parts if you include
- the key, battery, and antenna!
- In the CODE/NO-CODE debate on r.r.a.policy some pro-coders will
- mention the simplicity of CW xmtrs as opposed to those of other modes;
- this circuit really drives that point home (that's why I'm posting this
- on .policy)
- On r.r.a.misc we've heard talk about how costly ham gear is today - all
- this rig will cost you is the effort to find an old color TV chassis -
- that's the parts source for all my QRP transmitters (and this is why I'm
- also posting this on .misc).
- Normally I post these xmtrs only on r.r.a.homebrew and on the QRP
- mailgroup; so if you've missed the first dozen xmtr circuits email me
- and I'll send them off to you.
- I built this for 80M only because I've got so many 3579 kHz crystals
- from old TV sets, but this can be used on any HF band - just choose
- L and C to resonant at the crystal frequency.
- For peace of mind you might want to add a bandpass filter to the
- output.
-
-
- --------------------------------*---------*--------*----||---ANT
- | | | | 10pf
- | | | |
- - | ) ---
- XTAL | ) --- C
- - | ) L |
- | | / c ) |
- *----------------------------|/ | |
- | b |\ | |
- | 2N2188 \ e *---------
- / or any PNP | |
- \ 100K that'll work | |
- / GND |
- \ |
- | |
- *-----------------------------------------*
- | |
- | |
- | ---
- | --- .01uf
- | |
- ---------*KEY*----*1 to 4 volts +*--------*
- |
- |
- GND
-
- Again, choose L&C to resonant at the desired frequency; one of the two
- should be adjustable. I got both from the chromatic board of a TV -
- both were sitting next to the 3579 kc xtal; easy, huh? I didn't use
- a 2N2188 transistor; rather, I used a x-sistor right off the video
- board (of the TV).
- So, don't you dare buy one component for this - just dig through your
- junk box (or your neighbor's trash for an old TV). With a good antenna
- (those are the magic words in QRP work) this little peanut-whistle
- will provide hours of pleasurable QSO's.
- Oh, 3579 kc has become a national QRP frequency due to the easy avail-
- ability of these crystals.
-
- .... .- ...- . ..-. ..- -.
-
- 72,
- Jeff NH6IL
-
- From qrp-request@Think.COM Sat Jan 22 02:17:13 1994
- Return-Path: <jherman@uhunix.uhcc.Hawaii.Edu>
- id AA05375; Fri, 21 Jan 94 21:17:05 HST
- Date: Fri, 21 Jan 94 21:17:05 HST
- From: Jeff Herman <jherman@uhunix.uhcc.Hawaii.Edu>
- To: QRP@Think.COM
- Subject: CB XTALS
- Message-Id: <CMM.0.90.2.759223025.jherman@uhunix.uhcc.Hawaii.Edu>
-
- Gang,
- If you can get your hands on an older CB radio that uses crystal-mixing
- for the frequency synthesis you'll find one of the xtals is 10.140 MHz -
- the top of the 30 meter band!
- Maybe we should start a list as to what electronic gear contains xtals
- that fall in the ham bands. The most famous item on this list would be a
- color TV: the 3579 kc xtal. Randy mentioned you'll find this xtal in
- some touch-tone telephones.
- Now what might have a 7040 kc xtal.....
-
- Jeff NH6IL
-
- From qrp-request@Think.COM Sat Jan 22 02:54:58 1994
- Return-Path: <randy@cyphyn.radnet.com>
- id m0pNd9M-0001YvC; Sat, 22 Jan 94 02:52 EST
- Message-Id: <m0pNd9M-0001YvC@cyphyn.radnet.com>
- From: randy@cyphyn.radnet.com (Randy)
- Subject: Re: PROJECT 14: THE WORLD'S SMALLEST TRANSMITTER
- To: jherman@uhunix.uhcc.Hawaii.Edu (Jeff Herman)
- Date: Sat, 22 Jan 1994 02:52:55 -0500 (EST)
- Cc: qrp@Think.COM (qrp @think.com)
- In-Reply-To: <CMM.0.90.2.759219951.jherman@uhunix3.uhcc.Hawaii.Edu> from "Jeff Herman" at Jan 21, 94 08:25:51 pm
- X-Mailer: ELM [version 2.4 PL21]
- Content-Type: text
- Content-Length: 924
-
- HA! Far out! all but the key and the battery...right outa the tv.
- ( in fact...take apart the yolk and theres the wire for the ant)
-
- Colour TV's have in essesence 4 vidio amps ...which have transistors that
- will operate up beyond 4 mc ( probably fall off around 6-7mc)
- These ususally run on 60volts at 5ma, due to a resistor feeding the collector
- from a supply of up to 125vdc.
-
- So...having a 25vdc supply, and run them no heavier than say 20ma, you have a
- bit more power.
-
- Use 3 9 volt batteries in series.
-
- I have a fairly New NTE cat here..so gimmmme some numbers (anyone) and I'll
- look up the sub-specs ...get an idea what transistor may be good for.
- --
- Randy KA1UNW If you get a shock while
- servicing your equipment, "Works for me!"
- randy@192.153.4.200 DON'T JUMP! -Pete Keyes
- You might break an expensive tube!
-
- From qrp-request@Think.COM Sat Jan 22 13:17:54 1994
- Return-Path: <fmsystm!andrews@wariat.org>
- Sat, 22 Jan 94 13:17 EST for Think.COM!qrp
- id m0pNmqL-0000xrC; Sat, 22 Jan 94 13:13 EST
- Message-Id: <m0pNmqL-0000xrC@fms.com>
- From: andrews@fms.com (Andrew Sargent N8OFS)
- Subject: Re: CB XTALS
- To: jherman@uhunix.uhcc.Hawaii.Edu (Jeff Herman)
- Date: Sat, 22 Jan 1994 13:13:57 -0500 (EST)
- Cc: qrp@Think.COM (QRP)
- In-Reply-To: <CMM.0.90.2.759223025.jherman@uhunix.uhcc.Hawaii.Edu> from "Jeff Herman" at Jan 21, 94 09:17:05 pm
- Reply-To: andrews@telemax.com
- X-Mailer: ELM [version 2.4 PL21]
- Mime-Version: 1.0
- Content-Type: text/plain; charset=US-ASCII
- Content-Transfer-Encoding: 8bit
- Content-Length: 1559
-
- > Date: Fri, 21 Jan 94 21:17:05 HST
- > From: Jeff Herman <jherman@uhunix.uhcc.Hawaii.Edu>
- > To: QRP@Think.COM
- > Subject: CB XTALS
- > Message-Id: <CMM.0.90.2.759223025.jherman@uhunix.uhcc.Hawaii.Edu>
- > Content-Type: text
- >
- > Gang,
- > If you can get your hands on an older CB radio that uses crystal-mixing
- > for the frequency synthesis you'll find one of the xtals is 10.140 MHz -
- > the top of the 30 meter band!
- > Maybe we should start a list as to what electronic gear contains xtals
- > that fall in the ham bands. The most famous item on this list would be a
- > color TV: the 3579 kc xtal. Randy mentioned you'll find this xtal in
- > some touch-tone telephones.
- > Now what might have a 7040 kc xtal.....
- >
- > Jeff NH6IL
- >
- Well, I'm probably going to become flame-bait here, but I'll speak
- anyway. I have a @#$%load of those rocks from 23CH CB's (I was a
- rather ambitious CB'er at one time). Here is a list of what I have
- in the 10MHz range: {10.14 10.16 10.17 10.18 10.595 10.615
- 10.625 10.635}. Look for _any_ 23CH CB, and you will find 10MHz
- rocks of one kind or another. BTW, the old imported Sinclair
- computers used a colorburst xtal for the clock. Or, rip appart
- some TT-phones for colorburst xtals.
-
- So long for now... (asbestos lined underware zipped)
-
- --
- Mesmerized by a decade of hate, ! AMATEUR = N8OFS
- Flowers and remorse, ! ARMY MARS = AAN5HJT
- Fading vision lost in time, ! CB = THE NEON KNIGHT
- Tragedy on course!!! - Frontline Assembly ! HACKER = TH3 N30N KN16Ht
-
- From qrp-request@Think.COM Sat Jan 22 16:40:13 1994
- Return-Path: <auratek!auratek.com!epacyna@uunet.UU.NET>
- (5.61/UUNET-internet-primary) id AAvzzq05727; Sat, 22 Jan 94 16:40:01 -0500
- (queueing-rmail) id 163815.8813; Sat, 22 Jan 1994 16:38:15 EST
- id AA06613; Sat, 22 Jan 94 15:53:29 EST
- Date: Sat, 22 Jan 94 15:53:29 EST
- From: epacyna@auratek.com (Edward Pacyna)
- Message-Id: <9401222053.AA06613@auratek.com>
- To: uunet!Think.COM!qrp@uunet.UU.NET
- Subject: Re: RadioKit Review
- Cc: ed@auratek.com
-
-
- I have built nearly a dozen of these transceivers, so here is my 2 cents.
-
- First of all, I can not comment on the parts quality, as I furnish my own
- parts (expect for the air variable which I do buy from RadioKit).
-
- I buy the boards direct from FAR Circuits, the same source that RadioKit
- gets them. There are two versions, one from HR January 89 called NE602
- QRP CW 20M transceiver sells for $8, and the other from CQ September 90
- called QRP 15 transceiver and sells for $12. The earlier version had two
- COHN XTAL filters (one on each side of the IF amp. to develop 8 poles of
- selectivity and reduce board band noise) and a doublely tuned band pass
- filter in front of the RX mixer. The later has only a single tuned cir-
- cuit in front of the mixer, a 4 pole Chebyshev XTAL filter and adds RIT.
- Both versions include 2 stages of active AF filtering after the product
- detector, AGC and can easily be put on any band by changing the VFO and
- XTAL filter frequencies.
-
- Regarding the PCB boards:
-
- As mentioned, they are not silk screened with the component shape and
- Actually, I prefer this as it makes for a nicer looking finished product.
- Most builders should have no problem just following the parts placement
- diagram. However, a paint by the numbers approach might make it easier
- for some. The boards are very well laid out with a lot nice ground plane
- (pads are lined up and logical), however the later version does come
- with a couple of pads missing drilled holes). None of the 50 or so boards
- I've goten from FAR were soder masked (including the NN1G board set).
- The usually good soder plate by FAR takes soder very nicely. It is always
- good pratice to lightly clean any PCB with Comet before beginning. The
- board is very compact 4"W x 3"D (25% smaller than the NN1G board set and
- contains more circuitry e.g. RIT, active filter, AGC). With a higher part
- density, sodering does take a little more skill. Also, use only a low
- wattage iron with a point tip and a good quality thin soder. Those over
- 40 like myself, might be more comfortable with the magnifying eye glasses
- as sold in drug stores. I have been able to unsoder and remove parts over
- and over with a little care (I make lots of modifications along the way).
-
- Regarding the schematic:
-
- I recall that both the schematic and parts placement diagrams being correct.
- The problem is that they are sightly different. The difference is fairly
- minor and as long as you didn't get your license by memorizing the answers,
- should not be to difficult to resolve. I recall having to install one part
- on the soder side of the board. Pin 4 on the NE602 product detector needs
- to have a bypass capacitor on it (since it is unused and has RF floating on
- it). This is shown on both diagrams.
-
- Regarding the tuning capacitor:
-
- This is a very nice capacitor and I sometimes buy them from RadioKit. It has
- a silky smooth built in 7:1 reduction drive and is 5 - 55pF. The frequency
- vs shaft tuning is exceptionally linear. The plate spaceing is perhaps a bit
- wider than the broadcast band variables of yesterday. The stability is excell-
- ent. If it got shipped with the plates unmeshed or dropped on the floor, a
- rotor plate could bend.
-
- Possible modifications:
-
- The circuit works well as is. The RIT version is nice because the station your
- working made be using the opposite sideband or drift. The T/R switching is
- semi-breakin and as MFJ states in their ads "silky smooth". By the way, this
- circuit is the same as used in the MFJ 90XX. Full QSK is nice if its used
- (but I find few that do).
-
- I usually run my radios from a 13.8V regulated power source (and believe most
- others do). The on board 12V regulator is uneccessary and reduces overall RX
- gain. It would also be a good idea to insall some reverse polarity protection
- to protect your labor of love. A power diode in series with the power supply
- feed is simple (reduces voltage by about .7V) or install a series fuse in the
- line with a shunt power diode on the radio side of the fuse (cathode to fuse,
-
- The AGC is a mixed blessing. It is audio derived and pops on strong signals.
- I don't like any AGC on CW. First of all, if a strong signal is nearby, it
- reduces the RX gain making it more difficult to receive the weak signal and
- the usually pumping action is unpleasant. In a simular fashion, it reduces
- the opposite sideband surpression that your XTAL filter provides). On the
- other hand it reduces the signals dumped into the product detector. This is
- a weakness in the NN1G design. The NE602A is a wonderful device provided it's
- used correctly. Due to it's gain, the input intercept is -15dBM or so. If you
- give it more signal than it's meant to handle, you get a lot of IMD product.
- By the way, one nice feature of this design is that the VFO is buffered and
- has an adjustable pot allowing you to control the TX mixer drive and thereby
- reduce IMD products. On the receive side, I control the IF gain with a front
- panel pot on RX (use AGC for TX monitoring only). I do not install the volume
- control (it's kind of hockey installed on the AF power amp. anyway). You will
- have a much beter receiver with this approach.
-
- I always use IC sockets when I build. Use only low profile machined sockets
- (the ones that have round holes for the IC pins). There has recently been some
- discussion of NE602's oscillating (e.g. NN1G Marc II) when sockets are used.
- Although NE602's do have alot of gain up into VHF, oscillations are usually
- due to poor circuit layout or improper decoupling. As shown in the data sheet,
- the NE602 supply voltage sould be decoupled with a 5uH choke and bypassed at
- all frequencies with multiple bypass capacitors (e.g. .1uF, .001uF etc.). I
- usually use a 100 ohm resistor with a ferite bead for the choke. Also since
- maximum supply voltage is 8 volts and the best noise figure is at 6 volts, I
- use 6 volts (78L06 regulators). The advantage of sockets is that it makes the
- radio very easy to debug and or repair. If you have a problem, remove the IC
- so it doesn't load the circuit and using a multimeter make measurements to
- easily find soder bridges, components installed incorrectly etc.. I always
- build my radios backwards. For example in a RX start at the output and build
- toward the input (reverse in a TX). Just build the audio output stage and
- test it before you go on. You'll never have to deal with more than a few
- parts or 1 error at a time. Its easy to test stage by stage without a lot
- of fancy equipment too. After you build the audio amp., put your finger on
- the input. You should hear a buzz. Next build the product detector. You will
- hear a hiss if all is well (or you actually now have a DC receiver and so
- connect an antenna and your might hear some signals as you tune the BFO cap.).
- Next build the IF amp. and the signals you heard before should be louder etc..
-
- The other two changes I usually make to this radio are to change the VFO
- circuit to a series tuned config. (for lower noise) and stagger tune the AF
- active filter. With a little thought, the series circuit will fit on the same
- PCB pads provided. Most active filters simply repeat the same stages N times
- (e.g. same Q, frequency etc.). What you get is a very sharp needle nose
- response that rings and is not very useful. With stagger tuning, the Q,
- center frequency and gain is changed to get a bandpass response instead.
- Different bandpass shapes can be synthesized (e.g. Butterworth, Chebyshev
- etc.) with superior skirts. The circuit is exactly the same, only the R,C
- values change. I also build the filters with a little more gain so the sig-
- nal into the product detector can be kept low. Some times instead of the in
- out switch, I use a simple audio fader circuit like in the TenTec Century
- to simulate variable bandwidth.
-
- Sorry for getting so carried away here guys.
-
- My main point is that these are very nice transceivers, and should not present
- difficultly to many homebrewers. However, they are not suitable for novice
- level.
-
- 73
-
- Ed WE1AAZ
-
-
-
- From qrp-request@Think.COM Sun Jan 23 07:41:08 1994
- Return-Path: <dick@kanga.demon.co.uk>
- Date: Sat, 22 Jan 94 16:17:53 GMT
- Message-Id: <505806904@kanga.demon.co.uk>
- From: dick@kanga.demon.co.uk (Dick Pascoe)
- Reply-To: dick@kanga.demon.co.uk
- To: qrp@Think.COM
- Subject: fireball ??
- X-Mailer: PCElm 1.07 DIS
- Lines: 7
-
- Does anyone know where I can
- get any of the crystal oscillators
- that were used in the fireball
- transmitter ?
- Dick G0BPS
- --
- Richard Pascoe
-
- From qrp-request@Think.COM Sun Jan 23 09:40:12 1994
- Return-Path: <auratek!auratek.com!epacyna@uunet.UU.NET>
- (5.61/UUNET-internet-primary) id AAwacg28501; Sun, 23 Jan 94 09:40:04 -0500
- (queueing-rmail) id 093811.2631; Sun, 23 Jan 1994 09:38:11 EST
- id AA08348; Sun, 23 Jan 94 09:27:42 EST
- Date: Sun, 23 Jan 94 09:27:42 EST
- From: epacyna@auratek.com (Edward Pacyna)
- Message-Id: <9401231427.AA08348@auratek.com>
- To: uunet!Think.COM!qrp@uunet.UU.NET
- Subject: NN1G Notes
- Cc: ed@auratek.com
-
-
-
- After sending yesterdays mail Re: RadioKit, I had a NN1G Mark II
- board set that I began building up.
-
- Well now I see why the why the instructions tell you not to use
- sockets on the NE602's. From a RF design view, the layout is not
- very good. The NE602's are decoupled very poorly (if at all). As
- mentioned yesterday, put the V+ supply (pin 8) somewhere near a
- ground plane and install several bypass capacitors, a 100 ohm
- resistor and ferite beads near pin 8. In the Mark II a feeble
- attempt was made to decouple the product detector (from pin 8
- there is over a 1/2" of trace before a single MF bypass then al-
- most 3/4" more trace before a 47 ohm decoupleing resistor. On
- the product RX mixer pin 8 doesn't get decoupled (yes there is
- about 3/4" of trace and a bypass capacitor at the 78L08 regulator.
-
- The BFO circuit has trace running all over the place. Not only
- could this cause VHF oscillations, but could couple BFO signal
- back into the IF amp. input (something you don't want in a RX).
- The input and output trace for the XTAL filter is also much to
- long (1 1/2" to 2"). This could really set you up for performance
- problems (filtering and RX noise).
-
- I'm building it for 40M and using difference mixing in the RX
- as this will reduce the potential for spurs (10MHz IF, 3Mhz VFO).
- I built the filter on the bench using 390pF, 510pF and 640pF
- capacitors (vs 330/470/560) and measured a 500Hz 6 dB BW with a
- filter Z of 400 ohms.
-
- There is also a difference between what is shown on the schematic
- for L2 (low end to ground) and the actual board (tied to +12V).
- Its part of the rubbering circuit for the BFO and a strange one
- at that. +V eventually gets AC coupled to ground, but it would
- have been better to put the inductor in series between Y5 and C2.
-
- WEith my band plan in order to receive LSB mode I wanted the BFO
- to be on the high side of the filter so I won't install L2 anyway.
-
- To improve filter performance, I grounded all the crystals in the
- filter to eliminate coupleing between the units.
-
- I also see that the design runs the NE602's at 8 volts (ouch). The
- 8 volts also supplys the VFO. The NE602's are happier and perform
- better at 6 volts. But since I'm also going to add the QRP15 RIT
- circuit and need higher voltage to keep the varactor voltage more
- than the RF tank voltage I'll try go with the 8 volts (ouch). If
- your VFO doesn't oscillate with the 8 volt suply, get rid of the
- MPF102 (it's Vp specification is to board) and use a 2N5486 or
- better yet a J310.
-
- 73
-
- Ed W1AAZ
-
-
-
-
-
- From qrp-request@Think.COM Sun Jan 23 18:15:28 1994
- Return-Path: <mvjf@mvubr.att.com>
- Message-Id: <9401232315.AA27998@Early-Bird.Think.COM>
- From: mvjf@mvubr.att.com
- Date: Sun, 23 Jan 94 18:07 EST
- Original-From: mvubr!mvjf (James M Fitton +1 508 960 2577)
- To: QRP@Think.COM
- Subject: NC-40
-
-
- I bought a copy of World Radio News just to read the QRP column
- by Rich Fisher, KI6SN and the review on the NorCal-40.
- I could'nt agree more ! The NC-40 is destined to become
- a classic.
-
- Last night (40 was really hot) I worked countries #34 and 35
- with the NC-40 at 2 watts......
-
- 72 W1FMR
-
-
-
-
-
- From qrp-request@Think.COM Mon Jan 24 02:12:49 1994
- Return-Path: <dh@deneb.csustan.edu>
- id AA06636; Sun, 23 Jan 94 23:11:44 PST
- Date: Sun, 23 Jan 94 23:11:44 PST
- From: dh@deneb.csustan.edu (Doug Hendricks)
- Message-Id: <9401240711.AA06636@deneb.csustan.edu>
- To: Qrp@Think.COM
- Subject: March QRPp Table of Contents
-
- I have worked all weekend on the March issue of QRPp. Here is a partial table
- of contents. I am waiting on a couple of articles that have been promised.
- It will mail BEFORE the first of March!! Should be a good issue.
-
- From the Editor's Desk, Doug Hendricks, KI6DS 3
- Low Cost Wattmeter, Richard Urmonas, VK3DRU 4
- "Incidentally, What is a 10-10 Award?", Duane Mantick, WB9OMC 4
- Characterizing Station Performance, Howie Cahn, WB2CPU 5
- QRP Club List, Chuck Adams, K5FO 6
- HW8 + T50-6 + ECG488 = 5 Watts, Gary D. Borich, W5UDV 10
- NN1G Up and Running, Palu Mackanos, K2DB 12
- QRP = Cross Country Skiing, Kalman Laudon, WD6CZI 13
- Ten Tec Kits, Jeff Gold, AC4HF 14
- ARCI Sprint, Peter Hardie, VE5VA 14
- QRP Kit Sources, Reprinted from Aug. 93 QST 15
- CQ-WW-CW Results for AA2U, Randy Rand, AA2U 20
- MI QRP Contest, Brad Mitchell, WB8YGG 21
- Michigan QRP Contest, Jeff Gold, AC4HF 21
- RadioKit QRP 20, A Review, Jeff Gold, AC4HF 21
- Homebrew es QRPp Review, Chuck Adams, K5FO 22
- Kits vs. Homebrew, Gary Diana, N2JGU 23
- SSB Contesting QRP in the ARRL Sweepstakes 24
- Building the NN1G Mark II, Brad Mitchell, WB8YGG 25
- CMOS Super Keyer II, Jeff Gold, AC4HF 26
- SS 93, Chuck Adams, K5FO 27
- 93 Sweepstakes Report, Warren Lewis, KD4YRN 28
- 93 Sweepstakes, Bob Applegate, WA2ZZX 28
- My Favorite CW Contest, Jeff Gold, AC4HF 29
- My Account of SS, Mark Cronenwett, KA7ULD 29
- Another SS Story, Ron Majewski, WB8RUQ 30
- 93 SS, Greg Taylor, KD4HZ 30
- Ten-Tec Scout - QRP???, Dave Redfern, N4ELM 30
- MFJ-1786 Hi-Q Loop, David Baker, AB5PI 31
- MFJ-1786 Hi-Q Loop, John Welch, N9JZW 33
- My Version of the MFJ-1786 Loop, Tom Farish, KJ5LT 33
- Recollections: Bagging the NorCal 40 Kits, Jim Cates, WA6GER 34
- NorCal 40 Completed, Rich Mulvey, N2VDS 35
- Evaluation of the NorCal 40 Kit, Jeff Gold, AC4HF 36
- NorCal Revisited, Jeff Gold, AC4HF 37
- A Good Laugh with the NorCal 40, Jeff Gold, AC4HF 38
- Fix for Weak Audio in NorCal 40, Wayne Burdick, N6KR 38
- NA Sprint with the NorCal 40, Ron Majewski, WB8RUQ 39
- QRP Directional Power Meter & Antenna Tuner, Jim Pepper, W6QIF 39
- Battling the Great QRP Epidemic of 1993 and Losing
- My Experiences with the NorCal 40, J.C. Smith, KC6EIJ 41
- NorCal 40 Mods, Bob Warmke, W6CYX 43
- My NorCal 40, Todd Nichols, KB0HQU/VE3 44
- Extra Audio for the NorCal 40, Stan Cooper, K4DRD 44
- NorCal 40 Full Band Modification, Terry Young, KC6SOC 45
- QRP Plus Review, Andrew Comas, KF2JH 46
- A 30 Meter VXO Transmitter, Roy Gresson, W6EMT 48
- The K6LV Homebrew Paddles, Doug Hendricks, KI6DS 51
- Tidbidts (Helpful Hints for the QRPer), Mark Cronenwett, KA7ULD 54
- RadioKit Notes, Chuck Adams, K5FO 57
- Hints for Building the NN1G Mark II, Ed Paycyna 58
-
- Again, this is not a final list. I am waiting on at least 2 other articles.
- This one may be 6{4 pages. (Grin). 72, Doug, KI6DS
-
- From qrp-request@Think.COM Mon Jan 24 07:22:57 1994
- Return-Path: <bmitchel@CBA.Kodak.COM>
- id AA11691; Mon, 24 Jan 94 07:25:41 -0500
- Reply-To: bmitchel@CBA.Kodak.COM
- (5.65c/IDA-1.4.4); Mon, 24 Jan 1994 07:22:41 -0500
- Date: Mon, 24 Jan 1994 07:22:41 -0500
- From: Brad Mitchell <bmitchel@CBA.Kodak.COM>
- Message-Id: <199401241222.AA11467@hobby1.cba.kodak.com>
- To: qrp@Think.COM, epacyna@auratek.com
- Subject: Re: NN1G Notes
- Cc: ed@auratek.com
-
-
-
-
-
-
-
- > I also see that the design runs the NE602's at 8 volts (ouch). The
- > 8 volts also supplys the VFO. The NE602's are happier and perform
- > better at 6 volts. But since I'm also going to add the QRP15 RIT
- > circuit and need higher voltage to keep the varactor voltage more
- > than the RF tank voltage I'll try go with the 8 volts (ouch). If
- > your VFO doesn't oscillate with the 8 volt suply, get rid of the
- > MPF102 (it's Vp specification is to board) and use a 2N5486 or
- > better yet a J310.
- >
-
- I ran the ne602's with an 8v regulatro, and found that the regulator was
- actually 8.1 volts out. The problem showed up as a noise in the rx that
- sounded like precip static on an antenna, but apparantly it was some sort
- of break down mechanism.. I'm using 6v regulators on one, and 5 on my
- other nn1g rig.
-
- 73
- -----------------
- | ___ ________ | Bradley S. Mitchell WB8YGG
- | | / / | | Eastman Kodak Company
- | | / / | | KEMD Electronic Products
- | |< < K O D A K| | Circuit Board Assembly Dept. 606 Test Engineering
- | | \ \ | | 901 Elmgrove Road Rochester, N.Y. 14653-5211
- | |__\ \________| | (716) 726-5775, FAX (716) 726-7109
- | | INTERNET: bmitchel@kodak.com
- -----------------
-
-
-
-
-
- > 73
- >
- > Ed W1AAZ
- >
- >
- >
- >
- >
-
- From qrp-request@Think.COM Mon Jan 24 10:13:48 1994
- Return-Path: <jkearman@arrl.org>
- id AA07342 for qrp@think.com; Mon, 24 Jan 94 10:13:54 -0500
- (Smail3.1.28.1 #6) id m0pOSpy-000B8gC; Mon, 24 Jan 94 10:04 EST
- id AA28657 ; Mon, 24 Jan 94 09:38:54 GMT
- Date: Mon, 24 Jan 94 14:39:44 GMT
- Message-Id: <7285@jek>
- From: jkearman@arrl.org (Jim Kearman)
- To: QRP@Think.COM, boatanchors@gnu.ai.mit.edu
- Subject: Email
-
- The ARRL Board of Directors has set guidelines for electronic
- mail from Headquarters. Since the League pays for the system,
- that's fair enough.
-
- If you send me email and you want a response, I need your
- street address or at least the ARRL Division, so that I can
- prepare a copy of the email for your Director. This is done
- now for paper mail, but hasn't been done for electronic mail.
-
- Any postings I make will also have to be copied, presumably
- to the entire Board. Therefore, I'll no longer be able to
- post; I can't handle the additional work involved.
-
- These guidelines do not differentiate between business and
- private email. All mail emanating from me is considered
- business related. I'm going to have to investigate private
- Internet sites.
-
- 73
-
- Jim Kearman, KR1S
- Assistant Technical Editor
-
-
-
-
- From qrp-request@Think.COM Mon Jan 24 11:10:54 1994
- Return-Path: <jfw@ksr.com>
- id AA06182; Mon, 24 Jan 1994 11:10:16 -0500
- id AA13836; Mon, 24 Jan 94 11:10:07 EST
- id AA13854; Mon, 24 Jan 94 11:10:05 EST
- Message-Id: <9401241610.AA13854@kaos.ksr.com>
- id AA04620; Mon, 24 Jan 94 11:10:04 EST
- To: jkearman@arrl.org (Jim Kearman)
- Cc: QRP@Think.COM
- Subject: Re: Email
- In-Reply-To: Your message of "Mon, 24 Jan 94 14:39:44 GMT."
- <7285@jek>
- Date: Mon, 24 Jan 94 11:10:03 EST
- From: "John F. Woods" <jfw@ksr.com>
-
- jkearman@arrl.org (Jim Kearman) writes:
- > The ARRL Board of Directors has set guidelines for electronic
- > mail from Headquarters. Since the League pays for the system,
- > that's fair enough.
- > If you send me email and you want a response, I need your
- > street address or at least the ARRL Division, so that I can
- > prepare a copy of the email for your Director. This is done
- > now for paper mail, but hasn't been done for electronic mail.
- > Any postings I make will also have to be copied, presumably
- > to the entire Board. Therefore, I'll no longer be able to
- > post; I can't handle the additional work involved.
-
- I think that some board members must have been operating their HTs too
- close to their heads... ;-)
-
- (Jim, if this wisecrack makes you laugh, remember to record it in triplicate
- and file it with all the appropriate departments. :-)
-
- 73, and good luck finding sane internet access,
- John, WB7EEL (now-redfaced ARRL member)
-
- From qrp-request@Think.COM Mon Jan 24 12:12:03 1994
- Return-Path: <randy@cyphyn.radnet.com>
- (5.65c/IDA-1.4.4 for qrp@think.com); Mon, 24 Jan 1994 12:11:57 -0500
- id AA06722; Mon, 24 Jan 94 09:16:17 -0500
- id m0pOS18-0001YgC; Mon, 24 Jan 94 09:11 EST
- Message-Id: <m0pOS18-0001YgC@cyphyn.radnet.com>
- From: randy@cyphyn.radnet.com (Randy)
- Subject: 6AG7 is ON the air!
- To: pjk@cyphyn.radnet.com (Pete at Myth)
- Date: Mon, 24 Jan 1994 09:11:49 -0500 (EST)
- Cc: psc@colmiks.colmiks.com (aka (phil cook)),
- boatanchors@gnu.ai.mit.edu ((mail net) (boatanchor net)),
- qrp@Think.COM (qrp @think.com),
- michael_nagorski@quickmail.cis.yale.edu (michael nagorski)
- X-Mailer: ELM [version 2.4 PL21]
- Content-Type: text
- Content-Length: 1052
-
- Guess what I had for breakfast?
-
- 2 contacts on 3710kc using the 6AG7, 1 tube xmit, built upon a strip of
- wood...using fahnstock clips.
- Diagram was of the one I sent along a while back, but in THIS one, I omitted
- the 100 ohm kathode resistor. ( I was lazy)
-
- B+ was 150vdc , using the 150V.R (improved 150volt supply)....and the coil
- was aprox 6uh, with a 6:1 ratio link-output coil
- Tune cap was a AES's 400uuf job ( tune up lands it about 1/2 mesh ).
- It was mtd on an L bracket to allow easy fastening to the wood...shaft
- points straight up and I used a knob I 'borrowed' off the TV set.
-
- Contactee's were KB2ANL of Vestal NY who got me at 559 ... I got him 599.
- N1NJB of East Orland ME.. got me 479 ... I got him 589.
-
-
- NOW I'm gonna try 40!...free time willing!
- --
- Randy KA1UNW If you get a shock while
- servicing your equipment, "Works for me!"
- randy@192.153.4.200 DON'T JUMP! -Pete Keyes
- You might break an expensive tube!
-
- From qrp-request@Think.COM Mon Jan 24 13:25:39 1994
- Return-Path: <jkearman@arrl.org>
- id AA13665 for qrp@think.com; Mon, 24 Jan 94 13:25:37 -0500
- (Smail3.1.28.1 #6) id m0pOVxb-000B7fC; Mon, 24 Jan 94 13:24 EST
- id AA1177 ; Mon, 24 Jan 94 13:16:25 GMT
- Date: Mon, 24 Jan 94 17:53:42 GMT
- Message-Id: <7463@jek>
- From: jkearman@arrl.org (Jim Kearman)
- To: QRP@Think.COM, boatanchors@gnu.ai.mit.edu
- Subject: Misunderstanding
-
- Perhaps I didn't make my previous posting clear enough.
- Here's how it will work: I will have to send an electronic
- copy of any email I send, to the Director of the division
- in which the original recipient lives. This means I will have
- to determine who the Director is and forward an electronic
- copy to his or her MCImail account.
-
- I choose not to take the time to go through this exercise.
- I'm hopeful that, by not posting to the groups, I will
- stimulate less email that I have to annotate and copy to
- the directors. I just don't have time. Banging out a quick
- answer is one thing; this requirement is quite another.
-
- If you need something from me, you can always email me
- and I'll try to help. On the other hand, if you do not
- specifically address the email to me, I won't respond.
-
- This policy has nothing to do with expense or perceived
- wasting of time. The Board simply wants to be aware of
- what Headquarters staff is saying. We're already required
- to make copies of all written correspondence; this policy
- change merely includes electronic correspondence. There
- were reasons for their decision; it wasn't arbitrary. Last
- year I waxed philosophical about something and what I said
- wound up in a club newsletter edited by a challenger for
- League office, without my prior knowledge! In that same issue
- were remarks by two other Headquarters staffers, also reprinted
- without our knowledge or permission. Unfortunately, some other
- staffers have been indiscrete with postings and remarks, and
- said things that were considered injurious to the League. You
- elect the Board to look after the affairs and well-being of
- the League, and they feel these steps are necessary for them
- to do their jobs.
-
- Once again, I am voluntarily choosing to not post to either
- group in the future, merely to save myself some aggravation
- and potential aggravation. Nobody said I had to. Anyone with
- a gripe at the League can flame away with impunity, until I
- catch up to you at a hamfest some day!
-
- You can always call me on the phone: 203-666-1541 ext 279.
-
- 73
-
- Jim, KR1S
-
-
-
-
- From qrp-request@Think.COM Mon Jan 24 13:34:02 1994
- Return-Path: <randy@cyphyn.radnet.com>
- id m0pOW4L-0001fhC; Mon, 24 Jan 94 13:31 EST
- Message-Id: <m0pOW4L-0001fhC@cyphyn.radnet.com>
- From: randy@cyphyn.radnet.com (Randy)
- Subject: Re: 6AG7 is ON the air!
- To: Michael_Nagorski@quickmail.cis.yale.edu (Michael Nagorski)
- Date: Mon, 24 Jan 1994 13:31:24 -0500 (EST)
- Cc: pjk@Think.COM (Pete at Myth), psc@colmiks.colmiks.com (aka (phil cook)),
- boatanchors@gnu.ai.mit.edu ((mail net) (boatanchor net)),
- qrp@Think.COM (qrp @think.com)
- In-Reply-To: <m0pOVzo-0001fVC@cyphyn.radnet.com> from "Michael Nagorski" at Jan 24, 94 12:55:24 pm
- X-Mailer: ELM [version 2.4 PL21]
- Content-Type: text
- Content-Length: 420
-
- Ok...got some free time today....so...I'll have the 6AG7 on 40 mtrs.
-
- Who knows? Maybe some one here will hear me! Got 3rd contact ...on 40 mtrs
- so far.
-
- --
- Randy KA1UNW If you get a shock while
- servicing your equipment, "Works for me!"
- randy@192.153.4.200 DON'T JUMP! -Pete Keyes
- You might break an expensive tube!
-
- From qrp-request@Think.COM Mon Jan 24 13:58:04 1994
- Return-Path: <randy@cyphyn.radnet.com>
- id m0pOWS7-0000OQC; Mon, 24 Jan 94 13:55 EST
- Message-Id: <m0pOWS7-0000OQC@cyphyn.radnet.com>
- From: randy@cyphyn.radnet.com (Randy)
- Subject: no subject (file transmission)
- To: qrp@Think.COM (qrp @think.com)
- Date: Mon, 24 Jan 1994 13:55:59 -0500 (EST)
- X-Mailer: ELM [version 2.4 PL21]
- Content-Type: text
- Content-Length: 1054
-
- Jeff ! I mislaid yer address and waiting for you to repost so I could
- mail this to you....but...
-
- (burn-out at ) (burn)
- NTE type current volts hfe watts ft
- Motorola 104852 none listed*
- Motorola 2n2905 129 pnp lo pwr 1a 80 90 1w 150mc
- Motorola 104912 none listed*
- SanKen (?) 2s0223 02y 186 % npn med pwr 3a 60 100 12.5 50mc
- Toshiba .T c1569 4k 376 npn lo pwr 200ma 300v 100 1w 70mc
- 15w,if COLD
- NTE 1992/ crm-6 book
- Make sense? yes
-
- Jeff
-
- * Motorola is notorious for not releasing info on their all-number devices
-
- describe body of unit and ckt it came our of and I'll derive loose specs.
-
- % not 2s0223 but 2SC223 the jap C's look like '0"
-
- If ya like, let me gather up some drawings, and I'll soon send you a
- lickity-larrup transistors tester ...it beeps if unit is good, & hooked up
- right.
-
-
-
- From qrp-request@Think.COM Mon Jan 24 14:23:50 1994
- Return-Path: <bowles.chester@a1.aimhi.granit.MTS.dec.com>
- id AA03723; Mon, 24 Jan 94 11:23:45 -0800
- Mon, 24 Jan 94 11:23:44 -0800
- Posted: Mon, 24 Jan 94 19:10:01 -0800
- Date: Mon, 24 Jan 94 19:07:01 -0800
- Sender: bowles.chester@a1.aimhi.granit.MTS.dec.com
- From: "CHESTER BOWLES" <bowles.chester@a1.aimhi.mko.MTS.dec.com>
- Message-Id: <83819142104991/572567@AIMHI>
- To: qrp@think.com MTS@mts-gw.pa.dec.com
- Subject: Re: Misunderstanding 1
- Msg-Class: !AS
-
- [This message is converted from WPS-PLUS to ASCII]
-
- Jim Kearman writes:
-
-
- >>Perhaps I didn't make my previous posting clear enough.
- >>Here's how it will work: I will have to send an electronic
- >>copy of any email I send, to the Director of the division
- >>in which the original recipient lives. This means I will have
- >>to determine who the Director is and forward an electronic
- >>copy to his or her MCImail account.
-
- Wouldn't it just be easier to add them to the QRP@think.com
- distribution list? They might even enjoy reading the non_League stuff!
-
- Chet, AA1EX
-
- From qrp-request@Think.COM Mon Jan 24 15:03:13 1994
- Return-Path: <Kenneth.E.Harker@Dartmouth.EDU>
- id PAA19332; Mon, 24 Jan 1994 15:02:24 -0500
- Message-Id: <8703208@prancer.Dartmouth.EDU>
- Date: 24 Jan 94 15:02:19 EST
- From: Kenneth.E.Harker@Dartmouth.EDU (Kenneth E. Harker)
- Reply-To: Iago@Dartmouth.EDU (Iago)
- Subject: Re: Misunderstanding
- To: jkearman@arrl.org (Jim Kearman), QRP@Think.COM, boatanchors@gnu.ai.mit.edu
-
- --- Jim Kearman wrote:
- This policy has nothing to do with expense or perceived
- wasting of time. The Board simply wants to be aware of
- what Headquarters staff is saying. We're already required
- to make copies of all written correspondence; this policy
- change merely includes electronic correspondence.
- --- end of quoted material ---
-
- Next thing you know, you'll be working in front of a monitoring video camera,
- they'll be recording and analyzing your every keystroke with AI software, and
- timing your breaks to the rest room.
-
- _ken/n1pvb
-
- From qrp-request@Think.COM Mon Jan 24 15:21:15 1994
- Return-Path: <rsm@world.std.com>
- id AA21564; Mon, 24 Jan 1994 15:20:50 -0500
- Date: Mon, 24 Jan 1994 15:20:49 -0500 (EST)
- From: Robert Marlan <rsm@world.std.com>
- Sender: Robert Marlan <rsm@world.std.com>
- Reply-To: Robert Marlan <rsm@world.std.com>
- Subject: Re: Misunderstanding
- To: Jim Kearman <jkearman@arrl.org>
- Cc: QRP@Think.COM
- In-Reply-To: <7463@jek>
- Message-Id: <Pine.3.89.9401241541.A16868-0100000@world.std.com>
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
-
- Jim,
- I have a suggestion, There are several sites on the internet
- that let you have a free acccount which allows mail and usenet
- (unlimited) both receive and post. If you like I could help you get one
- of these accounts. It would be set up as you personal accountand thus
- say what you want. You could acess it via a simple telnet from where you are.
- The return address would be from the account not the league, and thus I would
- hope that would free you from problems. It seems like a sad day when the
- league impinges upon the fraternity of ham radio, and the best solution is to
- down grade technology (ie phone) Have they decided to start taping all
- calls..
- I believe a former president.... DIck Nixon could help them set it up!
- hope that might help
- bob ka6noc
-
-
- From qrp-request@Think.COM Mon Jan 24 18:33:46 1994
- Return-Path: <dh@deneb.csustan.edu>
- id AA07750; Mon, 24 Jan 94 15:32:37 PST
- Date: Mon, 24 Jan 94 15:32:37 PST
- From: dh@deneb.csustan.edu (Doug Hendricks)
- Message-Id: <9401242332.AA07750@deneb.csustan.edu>
- To: Qrp@Think.COM
- Subject: QRPp Address
-
- To subscribe to QRPp send $5 to Jim Cates, WA6GER, 3241 Eastwood Rd.,
- Sacramento, CA 95821. Checks and money orders made out to Jim Cates.
- Foreign subscriptions are $15 US, but we do mail airmail. 72, Doug
-
- From qrp-request@Think.COM Tue Jan 25 09:58:09 1994
- Return-Path: <JMG@tntech.edu>
- <01H83DG98ZM8DRPMHD@tntech.edu>; Tue, 25 Jan 1994 09:00:29 CST
- Date: Tue, 25 Jan 1994 09:00:29 -0600 (CST)
- From: "JEFF M. GOLD" <JMG@tntech.edu>
- Subject: QRP Plus
- To: qrp@Think.COM
- Message-Id: <01H83DG9ABUADRPMHD@tntech.edu>
- X-Vms-To: IN%"qrp@think.com"
- X-Vms-Cc: JMG
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
- Content-Transfer-Encoding: 7BIT
-
- Just got the flyer on the QRP Plus transceiver by Index labs.
-
- Boy it looks even tinier than I thought.. supposedly can run it all
- weekend 0n a small 4ah gel cell. I can see packing up a dipole,
- small tuner and gell cell and even bringing it on a plane (I am planning
- a trip to Arizon/New Mexico). don't know how it would do plugged into
- the cigarette lighter of a car.. no noise blanker..but then again I am
- currently using a Ten Tec 509.
-
- I would love to get my hands on one of these for a month or so and test
- it out.
-
- 72
-
- Jeff, AC4HF
-
- From qrp-request@Think.COM Tue Jan 25 10:52:19 1994
- Return-Path: <auratek!auratek.com!epacyna@uunet.UU.NET>
- (5.61/UUNET-internet-primary) id AAwajv04717; Tue, 25 Jan 94 10:52:05 -0500
- (queueing-rmail) id 104125.2763; Tue, 25 Jan 1994 10:41:25 EST
- id AA01194; Tue, 25 Jan 94 10:03:22 EST
- Date: Tue, 25 Jan 94 10:03:22 EST
- From: epacyna@auratek.com (Edward Pacyna)
- Message-Id: <9401251503.AA01194@auratek.com>
- To: uunet!Think.COM!qrp@uunet.UU.NET
- Subject: Building XTAL Filters
- Cc: ed@auratek.com
-
-
- Several folks have asked how I determined the filter response mentioned in
- my mail on the NN1G. I use the following setup.
-
-
- ................. .............. ....
- . VXO . . . >
- . Buffer/Amp/ ..../\/\/\... Filter . > R l
- . Atten. Pads . Rs . . >
- ................. .............. ....
- | |
- /// ///
-
- The VXO (variable crystal oscillator) uses one of the extra crystals left
- over. It's a JFet osc. with a MOSFet buffer amp. and a series of 50 ohm
- attenuation pads on it's output (to guarantee a 50 ohm signal source and
- allow output level adjustment. Output is from -20dBM to +10dBM.
-
- I take a best guess at the required filter termination R (R = Rl = (Rs+50).
- I use my multimeter (low voltage range) and a RF probe (from ARRL handbook)
- to monitor the voltage across Rl as I vary the VXO frequency. In effect I
- sweep the filter and plot the bandpass on graph paper. The generator freq-
- uency is monitored with a frequency counter (or receiver with accurate dial).
-
- If I get the expected response (even bandpass with just a bit of ripple)
- my guess was correct. If not, I try another R and repeat. After you do this
- a few times you get pretty good at knowing whether to increase or decrease
- R based on the response.
-
- 73
-
- Ed W1AAZ
-
-
- From qrp-request@Think.COM Tue Jan 25 11:11:18 1994
- Return-Path: <jkearman@nyx10.cs.du.edu>
- (5.65c/IDA-1.4.4 for <qrp@think.com>); Tue, 25 Jan 1994 09:09:03 -0700
- id AA00530; Tue, 25 Jan 94 09:09:49 MST
- Date: Tue, 25 Jan 94 09:09:49 MST
- From: jkearman@nyx10.cs.du.edu (Jim Kearman)
- Message-Id: <9401251609.AA00530@nyx10.cs.du.edu>
- X-Disclaimer: Nyx is a public access Unix system run by the University
- of Denver. The University has neither control over nor
- responsibility for the opinions or correct identity of users.
- To: qrp@Think.COM
- Subject: I'm baaack
-
-
- Now, where were we?...
-
- 72/73
-
- Jim, KR1S
- jkearman@nyx.cs.du.edu
-
-
- From qrp-request@Think.COM Tue Jan 25 11:52:50 1994
- Return-Path: <ccm!Michael_D_Wyman@intelhf.intel.com>
- (Smail3.1.28.1 #2) id m0pOr0D-000MNiC; Tue, 25 Jan 94 08:52 PST
- (Smail3.1.28.1 #1) id m0pOr2e-0000WoC; Tue, 25 Jan 94 08:55 PST
- Date: Tue, 25 Jan 94 08:55:04 PST
- From: Michael D Wyman <Michael_D_Wyman@ccm.hf.intel.com>
- Message-Id: <940125085504_3@ccm.hf.intel.com>
- To: qrp@Think.COM
- Subject:
-
-
- Text item: Text_1
-
- Jeff,
-
- My name is Mike Wyman WB1CWD. I have been active QRP here in
- Arizona with a number of associates in the Chandler area. I was
- wondering if we could get together while you are out here provided you
- are in the Phoenix area to chat QRP a while.
-
- Please let me know what you think . .
-
- 73 de Mike Wyman
- WB1CWD
-
- From qrp-request@Think.COM Tue Jan 25 14:19:32 1994
- Return-Path: <jherman@uhunix.uhcc.Hawaii.Edu>
- id AA02326; Tue, 25 Jan 94 09:19:18 HST
- id AA24339; Tue, 25 Jan 94 09:17:56 HST
- Date: Tue, 25 Jan 94 9:17:56 HST
- From: Jeff Herman <jherman@uhunix.uhcc.Hawaii.Edu>
- To: jkearman@nyx10.cs.du.edu (Jim Kearman)
- Cc: QRP@Think.COM
- Subject: Re: I'm baaack
- In-Reply-To: Your message of Tue, 25 Jan 94 09:09:49 MST
- Message-Id: <CMM.0.90.2.759525476.jherman@uhunix3.uhcc.Hawaii.Edu>
-
- Yea! Jim's back! That sure was fast.
-
- Okay now, Gang; no discussing you-know-what so we don't lose you-know-who
- again...
-
- Jeff NH6IL
-
- From qrp-request@Think.COM Tue Jan 25 14:55:09 1994
- Return-Path: <randy@cyphyn.radnet.com>
- id m0pOton-0001j4C; Tue, 25 Jan 94 14:52 EST
- Message-Id: <m0pOton-0001j4C@cyphyn.radnet.com>
- From: randy@cyphyn.radnet.com (Randy)
- Subject: Re: I'm baaack
- To: jkearman@nyx10.cs.du.edu (Jim Kearman)
- Date: Tue, 25 Jan 1994 14:52:56 -0500 (EST)
- Cc: qrp@Think.COM (qrp @think.com)
- In-Reply-To: <9401251609.AA00530@nyx10.cs.du.edu> from "Jim Kearman" at Jan 25, 94 09:09:49 am
- X-Mailer: ELM [version 2.4 PL21]
- Content-Type: text
- Content-Length: 735
-
- >
- >
- > Now, where were we?...
- >
- We were plotting and conspiring on how to bury yer boss in copys of all you
- send out!
-
- ===
- May I introduce a more cheerful item?
-
- Today and yesterday, I was happy as a clam in mud, with the 6AG7 QRP xmit
- on 80 & 40 mtrs.
- Thats the ckt I sent in the other day.
- On that set, I even suprised my self, getting 2 in a row on 80mtrs, yesterday
- morning!
- Now I have to stop, so I can catch up on my QSL's...!
-
- And you thought YOU had trouble!
-
- --
- Randy KA1UNW If you get a shock while
- servicing your equipment, "Works for me!"
- randy@192.153.4.200 DON'T JUMP! -Pete Keyes
- You might break an expensive tube!
-
- From qrp-request@Think.COM Tue Jan 25 17:35:15 1994
- Return-Path: <randy@cyphyn.radnet.com>
- id m0pOton-0001j4C; Tue, 25 Jan 94 14:52 EST
- Message-Id: <m0pOton-0001j4C@cyphyn.radnet.com>
- From: randy@cyphyn.radnet.com (Randy)
- Subject: Re: I'm baaack
- To: jkearman@nyx10.cs.du.edu (Jim Kearman)
- Date: Tue, 25 Jan 1994 14:52:56 -0500 (EST)
- Cc: qrp@Think.COM (qrp @think.com)
- In-Reply-To: <9401251609.AA00530@nyx10.cs.du.edu> from "Jim Kearman" at Jan 25, 94 09:09:49 am
- X-Mailer: ELM [version 2.4 PL21]
- Content-Type: text
- Content-Length: 735
-
- >
- >
- > Now, where were we?...
- >
- We were plotting and conspiring on how to bury yer boss in copys of all you
- send out!
-
- ===
- May I introduce a more cheerful item?
-
- Today and yesterday, I was happy as a clam in mud, with the 6AG7 QRP xmit
- on 80 & 40 mtrs.
- Thats the ckt I sent in the other day.
- On that set, I even suprised my self, getting 2 in a row on 80mtrs, yesterday
- morning!
- Now I have to stop, so I can catch up on my QSL's...!
-
- And you thought YOU had trouble!
-
- --
- Randy KA1UNW If you get a shock while
- servicing your equipment, "Works for me!"
- randy@192.153.4.200 DON'T JUMP! -Pete Keyes
- You might break an expensive tube!
-
- From qrp-request@Think.COM Tue Jan 25 19:00:01 1994
- Return-Path: <HARRIS.JHEISE@IC1D.HARRIS.COM>
- (Soft-Switch Central V4L380P3); 25 Jan 1994 18:40:18 EST
- Message-Id: <BL15B.JHEISE.5048.1994 0125 18 40 18 40>
- Date: 25 Jan 1994 18:40:18 EST
- From: "JHeise" <HARRIS.JHEISE@IC1D.HARRIS.COM>
- Subject: QRP Wattmeters
- To: qrp@Think.COM
- Comment: MEMO 1994/01/25 18:57
-
-
- Can anyone give me some feedback on good QRP wattmeters? All of us
- want to run legal QRP levels. I would also like to be able to measure
- accurately when I really start to reduce power. Not everyone can
- afford a Bird Thruline. What are some good accurate alternatives? I
- have heard mixed reports on some of the units on the market.
-
- I am preparing a QRP presentation for a local radio club, and I want
- to include a few words on this subject. I would appreciate any good
- input either posted, if applicable to all, or direct at my address
- below.
- 72/73 Jan, WA4VQD jheise@ic1d.harris.com
-
-
-
- From qrp-request@Think.COM Tue Jan 25 19:16:40 1994
- Return-Path: <HARRIS.JHEISE@IC1D.HARRIS.COM>
- (Soft-Switch Central V4L380P3); 25 Jan 1994 18:55:18 EST
- Message-Id: <BL15B.JHEISE.5054.1994 0125 18 55 18 55>
- Date: 25 Jan 1994 18:55:18 EST
- From: "JHeise" <HARRIS.JHEISE@IC1D.HARRIS.COM>
- Subject: QRP Contest Scoring
- To: qrp@Think.COM
- Comment: MEMO 1994/01/25 19:14
-
-
- I was completing my entry for the Michigan QRP contest (first time)
- and had a couple questions for some of you veterans.
-
- 1. In reading the rules, I interpret the MI QRP SPC calculation to be
- calculated as in the ARCI contests where you sum all the
- State/Province/Country (SPC) separately for each band. Not just
- counted once for the entire contest as in some ARRL contests.
- (Yes, I just worked the RTTY Roundup.) Am I correct?
-
- 2. Homebrew is a bonus multiplier applied to all contacts, and not on
- a band by band basis. I interpret this to mean that if I used a mix
- of HB on some bands, but commercial on some others, I cannot take
- credit for the bonus. This seems like the honest way to me, but the
- way it is written I could see one saying "I used a HB transmitter,
- so..." Is my interpretation correct?
-
- TNX - 72/73 Jan, WA4VQD jheise@ic1d.harris.com
-
-
-
- From qrp-request@Think.COM Tue Jan 25 19:52:41 1994
- Return-Path: <bal@ccd.harris.com>
- id AA03446; Tue, 25 Jan 94 19:52:32 EST
- id AA47054; Tue, 25 Jan 1994 19:57:30 -0500
- From: bal@ccd.harris.com (Bruce Lifter)
- Message-Id: <9401260057.AA47054@sarsa>
- Subject: Building the NN1G Mark II XCVR
- To: qrp@Think.COM
- Date: Tue, 25 Jan 1994 19:57:29 -0500 (EST)
- Cc: bal@ccd.harris.com (Bruce Lifter)
- X-Mailer: ELM [version 2.4 PL20]
- Mime-Version: 1.0
- Content-Type: text/plain; charset=US-ASCII
- Content-Transfer-Encoding: 7bit
- Content-Length: 5819
-
- Our next local club meeting's program is going to be on QRP. I provided
- the following article to be included in the corresponding newsletter. I
- though you all might also be interested.
-
- 73, Bruce
-
- ----------------------------------------------------------------------------
-
- Building the NN1G Mark II XCVR
- by Bruce Lifter, KR4AQ
-
- I was interested in building a small QRP rig that would fit in my brief
- case that I could take with me when I'm out of town. I really did not want
- to dump $200 into a kit for fear it would not perform that well and I might
- not get it working. I ran across a few references to the NN1G rig via various
- internet sources. It was getting pretty good remarks about it and, most
- important, it was inexpensive ($59.95). This seemed like pretty low risk,
- so I went ahead and ordered one from Dan's Small Parts and Kits.
-
- The NN1G Mark II is a 1.5 watt single band superhet transceiver. It
- was designed around three NE602 IC's (double balanced mixer and oscillator
- all on a single chip). The rig has a VFO based on the Hartley oscillator and
- has a crystal filter. According to the documentation provided, the rig is
- supposed to draw about 30 mA on receive and about 215 mA on transmit.
-
- The kit comes with two silk screened boards (one TX, one Recv), all
- board mounted components, a 10k audio pot, and a nice air variable
- capacitor. The air variable is optional. He sells the kit for $10 less
- without the air variable. The Air variable he sends depends on what he has
- on hand. The one I received had a 7:1 reduction drive built in. The kit is
- for either 80, 40, 30, or 20 meter bands. I ordered the 40 meter kit.
- The builder must supply the case, hook up wire, and all knobs and connectors.
-
- The documentation that came with the kit consisted of a circuit diagram,
- 2 pages listing the parts included, 2 pages of parts layout diagrams (one
- for the TX board and one for the Recv board), an article describing the
- original NN1G rig by Dave Benson (NN1G) from the January 93 QRP Quarterly,
- 2 pages of information on building and aligning the NN1G Mark II transceiver
- (written by NN1G), and a page on putting the NN1G Transceiver on 80/40/30
- meters, apparently from another edition of the QRP Quarterly.
-
- This is definitely not a Heath kit! The documentation gives very little
- instruction on how to put the kit together. There is a few tips provided
- on building such as not putting the chips in sockets for it may cause one
- them to oscillate at VHF.
-
- I started by checking the parts provided against the parts list. Everything
- checked out OK except for two capacitors that were supposed to be 47pf which
- measured on my multimeter as 470pf. They were marked with 470 which can
- be interpreted as either 47 or 470.
-
- Not having much experience in building XCVRs, I decided to solder it all
- together, mount it in its case and then jump right into the alignment procedure.
- I won't do that again. I got to step 3 in the alignment procedure and found
- that the local oscillator was not oscillating. This drove me crazy for about
- a week. To make a long story short, I ended up desoldering all the IC chips
- and methodically replacing every component in the VFO circuit. The bottom line
- was that a single 330pf NPO capacitor was bad. The worst part was that I had
- taken out the bad capacitor, measured it and then put it back in the board
- again only to later find out that it was the guilty party. I still don't know
- whats wrong with the cap, it checks out with my meter.
-
- Once I got the LO to oscillate, things went much smoother. I plugged the ICs
- back in the board and completed the rest of the alignment with little trouble.
- The alignment procedure was easy to follow and well written.
-
- I installed the rig in a Radio Shack 3 X 5.25 X 5.875 metal cabinet. The
- boards and air variable fit with plenty of room for future modifications. I
- have already made two minor mods to the rig. First I added a trimmer cap
- in parallel to the air variable. This allows me to easily change the start
- and end frequency of the rig. (The rig has about 80k hertz coverage with
- air variable supplied with my kit.) The mod does not seem to affect the
- stability of the VFO. The other mod was also pretty minor; I placed a diode
- in series with the power supply for polarity protection.
-
- The rig seems to operate quite well. My only complaints so far are in the audio
- portion of the rig (all of which should be fixed shortly with further
- minor modifications). The kit, as it comes, does not seem to be able to drive
- anything other than a set of head phones. The LM386 used in the audio section
- is supposed to have another 20 dB of gain in reserve. Dan is sending me
- a mod sheet that will allow the rig to easily drive a 5 inch speaker. My
- other complaint is that the side tone audio is to low while transmitting.
- While testing with a strong station across town, I could barely hear my side
- tone while transmitting. A mod to cure this is already floating around
- Internet.
-
- Overall I am very pleased with this kit. My main rig is an ICOM 737 without
- a CW filter. The Mark II is actually easier to listen to at night during noisy
- band conditions due to its filter. I think I'm ready to build another one for
- 20 or 30 meters. I talked to Danny Stevig (of Dan's Small Parts and Kits)
- today and he tells me that he currently has the kits on special, 4/$200 mix
- and match the bands.
-
- One more note,... special thanks to Doug Snowden, N4IJ and Dave Rush, WO4Z
- for their patient help in my struggle get the LO working.
-
-
- --
- Bruce Lifter MS: R5-202
- Harris Corporation email: blifter@ccd.harris.com
- Controls Division Amateur Radio Packet: KR4AQ@N5AUV.#MLB.FL.USA.NA
- ----------------------------------------------------------------------------
-
- From qrp-request@Think.COM Tue Jan 25 20:45:13 1994
- Return-Path: <jkearman@nyx10.cs.du.edu>
- (5.65c/IDA-1.4.4 for <qrp@think.com>); Tue, 25 Jan 1994 18:43:11 -0700
- id AA15883; Tue, 25 Jan 94 18:43:57 MST
- Date: Tue, 25 Jan 94 18:43:57 MST
- From: jkearman@nyx10.cs.du.edu (Jim Kearman)
- Message-Id: <9401260143.AA15883@nyx10.cs.du.edu>
- X-Disclaimer: Nyx is a public access Unix system run by the University
- of Denver. The University has neither control over nor
- responsibility for the opinions or correct identity of users.
- To: qrp@Think.COM
- Subject: NN1G Mark II Transceiver
-
-
- Ed Pacyna mentioned some problems with long, narrow traces
- connected to the NE602 devices. I talked to Dave Benson a
- few minutes ago, and he's working on a better board layout.
- Bear in mind, if this was a commercial operation, his rig
- wouldn't be available for two years! He went from drawing board
- to having 200 units in the field in a matter of months.
-
- Of course, we "reactionary" types who insist on building
- ground-plane style don't have these problems..... :>
-
- 72
-
- Jim, KR1S
-
-
- From qrp-request@Think.COM Tue Jan 25 20:41:54 1994
- Return-Path: <jkearman@nyx10.cs.du.edu>
- (5.65c/IDA-1.4.4 for <qrp@think.com>); Tue, 25 Jan 1994 18:39:53 -0700
- id AA15467; Tue, 25 Jan 94 18:40:40 MST
- Date: Tue, 25 Jan 94 18:40:40 MST
- From: jkearman@nyx10.cs.du.edu (Jim Kearman)
- Message-Id: <9401260140.AA15467@nyx10.cs.du.edu>
- X-Disclaimer: Nyx is a public access Unix system run by the University
- of Denver. The University has neither control over nor
- responsibility for the opinions or correct identity of users.
- To: qrp@Think.COM
- Subject: QRP Wattmeters
-
-
- Jan, WA4VQD asks about accurate QRP wattmeters. First, the
- Bird wattmeter isn't that accurate at QRP levels, on HF.
- The smallest full-scale element you can get is 25 W.
-
- It is fairly simple to calibrate a wattmeter if the load
- is of known, non-reactive impedance. An oscilloscope or
- rf voltmeter is all you need.
-
- A pretty good wattmeter a few of us have built appears
- in recent editions of the ARRL Handbook. It was designed
- by Roy Lewallen, and originally appeared in Feb 90 QST.
- I think Oak Hills sells kits, and you can get boards from
- FAR Circuits.
-
- The Wenz Company marketed a couple of QRP-range wattmeters
- in the US for a while. I'm not sure if Wenz is the actual
- manufacturer or not; similar wattmeters have also been sold
- with Yaesu's name on them. As far as I know, they're no longer
- sold here, though.
-
- An SWR indicator I particularly like is in Solid State
- Design. It uses a load to protect your finals while you
- tune the antenna; then you switch out the load and operate.
- This indicator doesn't indicate actual SWR or power, but
- most of the time I don't care. The circuit is shown as
- part of a 40-meter T-match antenna tuner, near the back of
- the book. Sorry, my copy is still in the box from when I
- relocated my desk.
-
- 72,
-
- Jim, KR1S
-
- From qrp-request@Think.COM Tue Jan 25 22:29:29 1994
- Return-Path: <fmsystm!andrews@wariat.org>
- Tue, 25 Jan 94 22:27 EST for Think.COM!qrp
- id m0pP0p3-0001BiC; Tue, 25 Jan 94 22:21 EST
- Message-Id: <m0pP0p3-0001BiC@fms.com>
- From: andrews@fms.com (Andrew Sargent N8OFS)
- Subject: 10.14 xmiter schematics???
- To: qrp@Think.COM (QRP)
- Date: Tue, 25 Jan 1994 22:21:41 -0500 (EST)
- Reply-To: andrews@telemax.com
- X-Mailer: ELM [version 2.4 PL21]
- Mime-Version: 1.0
- Content-Type: text/plain; charset=US-ASCII
- Content-Transfer-Encoding: 8bit
- Content-Length: 604
-
- Hello gang,
-
- Since 10.14Mhz is in the 30M band, why dosen't somebody design a
- 5W (or less) xmiter, and I will build them and sell them (QRP
- mail-list members have first dibbs). I managed to locate 12 10.14
- xtals, I'll probably find more.
-
- Just wondering...
-
- BTW, my personal 5.6GHz record is 37.75 miles on 2W Point-to-Point.
-
- --
- Mesmerized by a decade of hate, ! AMATEUR = N8OFS
- Flowers and remorse, ! ARMY MARS = AAN5HJT
- Fading vision lost in time, ! CB = THE NEON KNIGHT
- Tragedy on course!!! - Frontline Assembly ! HACKER = TH3 N30N KN16Ht
-
- From qrp-request@Think.COM Wed Jan 26 01:00:20 1994
- Return-Path: <jherman@uhunix.uhcc.Hawaii.Edu>
- id AA12698; Tue, 25 Jan 94 20:00:07 HST
- id AA29701; Tue, 25 Jan 94 20:00:08 HST
- Date: Tue, 25 Jan 94 20:00:08 HST
- From: Jeff Herman <jherman@uhunix.uhcc.Hawaii.Edu>
- To: QRP@Think.COM
- Subject: 10.14 mhz xmtrs
- Message-Id: <CMM.0.90.2.759564008.jherman@uhunix3.uhcc.Hawaii.Edu>
-
- Gang,
- Andrew brought up a good idea - now that we know a source for 10.14 MHZ
- xtals (the older synthesized CBs) why not take one of those QRP xmtr
- circuits I posted for, say, 40M and change L and C in the tank and filter
- sections so they're resonant in the 30M band. 30M seems awfully quiet
- from my QTH here in Hawaii; even last month while I was in California
- that band was dead. Let's put some life into it!
-
- Jeff NH6IL
-
- From qrp-request@Think.COM Wed Jan 26 09:16:58 1994
- Return-Path: <gmd@rfc.comm.harris.com>
- id AA06573; Wed, 26 Jan 1994 09:20:19 -0500
- id AA09803; Wed, 26 Jan 1994 09:20:18 -0500
- Message-Id: <9401261420.AA09803@usc02.rfc.comm.harris.com>
- To: qrp@Think.COM
- Subject: QRP Wattmeters
- Date: Wed, 26 Jan 94 09:20:11 -0500
- From: gmd@rfc.comm.harris.com
- X-Mts: smtp
-
-
- A question was asked about what existed out there for affordable
- QRP wattmeters, a timely question as February QST has a Jeff Gold
- article which in part discusses this.
-
- Jim (KR1s) mentioned the W7EL wattmeter in a recent post... I just
- finished building one this past weekend. It seems to work just fine.
- You'll notice that this is the design which Oak Hills Research most
- likely uses for their wattmeter. My kit was from 624 Kits, and didn't
- include the 1 mA meter, enclosure, or RF connectors, as opposed to the
- Oak Hills kit which is complete. In my situation, I had a case laying
- around which is roughly the same size as the OHR enclosure and cost me $2;
- a quick trip to the Ramsey parts outlet netted me a 1 mA meter for $1.
- Here's how I see the economics of building this particular wattmeter:
-
- 1. Oak Hills Research Kit - complete - $80
-
- 2. 624 Kits - parts kit - $36
- ($40 = cost of kit + my enclosure/meter/connectors)
-
- 3. You procure all parts, enclosure, and meter - $20
- Note that depending on your local/mailorder surplus parts
- accessibility, the above cost may vary.
-
- If you are really interested in this design, check out the February
- 1990 issue of QST, or look it up in the ARRL book "QRP Classics".
-
- 73 to all.
- - Gary N2JGU
-
- ------------ Gary M. Diana, Sr. N2JGU
- | | | | Harris Corporation
- | | | | RF Communications Division
- |-|/\/\/\/\|-| Automated Communications Group, MS 220
- |-|/\/\/\/\|-| 1680 University Avenue
- | | | | Rochester, NY 14610
- | | | | (716) 242-3807
- ------------ Internet: gmd@rfc.comm.harris.com
-
- From qrp-request@Think.COM Wed Jan 26 10:16:04 1994
- Return-Path: <jkearman@arrl.org>
- id AA01200 for qrp@think.com; Wed, 26 Jan 94 10:16:11 -0500
- (Smail3.1.28.1 #6) id m0pPBxK-000B8iC; Wed, 26 Jan 94 10:14 EST
- id AA4963 ; Wed, 26 Jan 94 10:06:15 GMT
- Date: Wed, 26 Jan 94 15:07:07 GMT
- Message-Id: <7812@jek>
- From: jkearman@arrl.org (Jim Kearman)
- To: QRP@Think.COM, boatanchors@gnu.ai.mit.edu
- Subject: 73
-
- My efforts to reduce the hassle factor have apparently backfired,
- so I am voluntarily unsubscribing from these groups.
-
- 73,
-
- Jim, KR1S
-
-
-
- From qrp-request@Think.COM Wed Jan 26 10:40:28 1994
- Return-Path: <JMG@tntech.edu>
- <01H84TY36ANKDRPZCE@tntech.edu>; Wed, 26 Jan 1994 09:42:45 CST
- Date: Wed, 26 Jan 1994 09:42:45 -0600 (CST)
- From: "JEFF M. GOLD" <JMG@tntech.edu>
- Subject: New Ham
- To: qrp@Think.COM
- Message-Id: <01H84TY398R6DRPZCE@tntech.edu>
- X-Vms-To: IN%"qrp@think.com"
- X-Vms-Cc: JMG
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
- Content-Transfer-Encoding: 7BIT
-
- Help,
-
- There is a local young ham that went through a Novice class I taught and
- I have been friendly with the family since. He called and is interested
- in upgrading to General. I need to get him the latest test banks for
- Technician and General. He will be borrowing my QRP equipment to get on
- the air. .so really is relevant to this group HI HI.
-
- What is the easiest way to get it.. any ftp sites.. does ARRL have it
- available over Internet.
-
- thanks in advance for any help.
-
- 72
-
- Jeff, AC4HF
-
- From qrp-request@Think.COM Wed Jan 26 12:00:20 1994
- Return-Path: <cleveland@gvg47.gvg.tek.com>
- id AA20623; Wed, 26 Jan 94 08:41:08 PST
- id AA04098; Wed, 26 Jan 1994 08:42:52 -0800
- V4.2-12 #4050) id <01H84S0LGGKGN9WFO0@gvg47.gvg.tek.com>; Wed,
- 26 Jan 1994 08:44:54 PDT
- Date: Wed, 26 Jan 1994 08:44:34 -0800
- From: cleveland@gvg47.gvg.tek.com (Grover Cleveland)
- Subject: Antenna modeling software
- To: qrp@Think.COM
- Message-Id: <01H84S0Q9SXIN9WFO0@gvg47.gvg.tek.com>
- X-Envelope-To: qrp@think.com
- Mime-Version: 1.0
- Content-Type: text/plain; charset="us-ascii"
- Content-Transfer-Encoding: 7BIT
-
- I am in need of inexpensive antenna modeling software. It doesn't need
- to do anything but wire antennas but must produce accurate plots
- of horizontal and vertical gain at any height above ground.
-
- Any suggestions?
-
- Grover
- WT6P
-
-
-
- From qrp-request@Think.COM Wed Jan 26 12:31:43 1994
- Return-Path: <Raymond.Anderson@EBay.Sun.COM>
- id AA08982; Wed, 26 Jan 94 09:31:34 PST
- id AA14345; Wed, 26 Jan 94 09:31:32 PST
- id AA04406; Wed, 26 Jan 94 09:32:53 PST
- Date: Wed, 26 Jan 94 09:32:53 PST
- From: Raymond.Anderson@EBay.Sun.COM (Ray Anderson)
- Message-Id: <9401261732.AA04406@uranium.EBay.Sun.COM>
- To: qrp@Think.COM
- Subject: re:73
-
-
-
- Your second exit was even quicker than your first return.
- What would we do without red-tape and management? (Probably quite a bit)
-
- 73's,
- Ray, WB6TPU
-
-
- ----- Begin Included Message -----
-
- From qrp-request@Think.COM Wed Jan 26 08:44:38 1994
- Date: Wed, 26 Jan 94 15:07:07 GMT
- From: jkearman@arrl.org (Jim Kearman)
- To: QRP@Think.COM, boatanchors@gnu.ai.mit.edu
- Subject: 73
- Content-Length: 137
-
- My efforts to reduce the hassle factor have apparently backfired,
- so I am voluntarily unsubscribing from these groups.
-
- 73,
-
- Jim, KR1S
-
-
-
-
- ----- End Included Message -----
-
-
- From qrp-request@Think.COM Wed Jan 26 12:58:30 1994
- Return-Path: <dfinley@aoc.nrao.edu>
- id AA01664; Wed, 26 Jan 1994 10:58:25 -0700
- Message-Id: <199401261758.AA01664@orion.aoc.nrao.edu>
- Date: Wed, 26 Jan 1994 10:58:25 -0700
- From: Dave Finley <dfinley@aoc.nrao.edu>
- To: qrp@Think.COM
- Subject: Any info on QRP Plus?
-
-
- Has anyone had recent contact with Index Labs or actually seen
- a QRP Plus transceiver?
-
- A friend of mine called the phone number on the flyer and got
- a message that the number had been disconnected.
-
- Thanks,
-
- Dave Finley, N1IRZ
-
-
- From qrp-request@Think.COM Wed Jan 26 13:56:54 1994
- Return-Path: <dick@kanga.demon.co.uk>
- Date: Tue, 25 Jan 94 22:58:52 GMT
- Message-Id: <1179727@kanga.demon.co.uk>
- From: dick@kanga.demon.co.uk (Dick G0BPS)
- Reply-To: dick@kanga.demon.co.uk
- To: qrp@Think.COM
- Subject: Re: I'm back (agn)
- X-Mailer: PCElm 1.08
- Lines: 5
-
- After all that, he's back
- and I thought we has lost him.
- Welcome home Jim
- --
- Dick G0BPS
-
- From qrp-request@Think.COM Wed Jan 26 16:00:19 1994
- Return-Path: <ccm!Michael_D_Wyman@intelhf.intel.com>
- (Smail3.1.28.1 #2) id m0pPHLJ-000MPkC; Wed, 26 Jan 94 13:00 PST
- (Smail3.1.28.1 #1) id m0pPHNu-00013DC; Wed, 26 Jan 94 13:02 PST
- Date: Wed, 26 Jan 94 13:02:46 PST
- From: Michael D Wyman <Michael_D_Wyman@ccm.hf.intel.com>
- Message-Id: <940126130246_207@ccm.hf.intel.com>
- To: qrp@Think.COM
- Subject: QRP Plus . . .
-
-
- Text item: Text_1
-
-
- I talked to Bruce Franklin yesterday and he has a shipment on
- Feb 5. The number is (206)851-5725. We chatted a while about the radio
- and the future stuff that he is considering . . .
-
- Hope that helps 72
- Mike Wyman WB1CWD
-
- From qrp-request@Think.COM Wed Jan 26 18:51:56 1994
- Return-Path: <adams@chuck.dallas.sgi.com>
- for qrp@think.com id AA21543; Wed, 26 Jan 94 15:51:51 -0800
- for @sgi.sgi.com:qrp@think.com id AA11059; Wed, 26 Jan 94 17:34:35 -0600
- for @sgidal.dallas.sgi.com:qrp@think.com id AA14068; Wed, 26 Jan 94 17:34:34 -0600
- Date: Wed, 26 Jan 94 17:34:34 -0600
- From: adams@chuck.dallas.sgi.com (Chuck Adams)
- Message-Id: <9401262334.AA14068@chuck.dallas.sgi.com>
- To: qrp@Think.COM
- Subject: 40 meters
-
-
- seems like 40 meters this past week has been hot.
-
- two nights ago, for the first time in over a month, i fired up the
- K5FO Special on 40 (the only band it'll work on).
-
- heard a W6 calling CQ around 7040 and he was 599, so what the hey.
- also, he was doing 40wpm. he gave me 539 (stingy S-meter) :-)
-
- no QRM, so he asked me if i could crank it up. of course. so at 70wpm
- we carried on for a while. he had me clear but i heard an amtor from
- europe (my guess) just above the noise level.
-
- the W6 was running 1KW and i was at 0.95W. i'll be on tonite.
-
- i have spent some time (the reason why the low level of activity with
- this group) entering 30+ years of awards data for the QRP ARCI into
- a PC computer. :-) had to do it to make sure that it was set for
- eternity.
-
- congrats to Jeff Gold on his highly visible article in the Feb QST.
- Jeff obviously has too much time on his hands. :-) ;-)
-
- more to follow. the vacation is over.
-
-
- dit dit
- Chuck Adams K5FO CP-60 wpm
- adams@sgi.com
-
-
-
-
- From qrp-request@Think.COM Wed Jan 26 22:32:24 1994
- Return-Path: <fmsystm!andrews@wariat.org>
- Wed, 26 Jan 94 22:31 EST for Think.COM!qrp
- id m0pPNOy-000110C; Wed, 26 Jan 94 22:28 EST
- Message-Id: <m0pPNOy-000110C@fms.com>
- From: andrews@fms.com (Andrew Sargent N8OFS)
- Subject: Re: 10.14 mhz xmtrs
- To: jherman@uhunix.uhcc.Hawaii.Edu (Jeff Herman)
- Date: Wed, 26 Jan 1994 22:28:16 -0500 (EST)
- Cc: qrp@Think.COM (QRP)
- In-Reply-To: <CMM.0.90.2.759564008.jherman@uhunix3.uhcc.Hawaii.Edu> from "Jeff Herman" at Jan 25, 94 08:00:08 pm
- Reply-To: andrews@telemax.com
- X-Mailer: ELM [version 2.4 PL21]
- Mime-Version: 1.0
- Content-Type: text/plain; charset=US-ASCII
- Content-Transfer-Encoding: 8bit
- Content-Length: 1409
-
- > Date: Tue, 25 Jan 94 20:00:08 HST
- > From: Jeff Herman <jherman@uhunix.uhcc.Hawaii.Edu>
- > To: QRP@Think.COM
- > Subject: 10.14 mhz xmtrs
- > Message-Id: <CMM.0.90.2.759564008.jherman@uhunix3.uhcc.Hawaii.Edu>
- > Content-Type: text
- >
- > Gang,
- > Andrew brought up a good idea - now that we know a source for 10.14 MHZ
- > xtals (the older synthesized CBs) why not take one of those QRP xmtr
- ^^^^^^^^^^^^^^^^^^^^^^^^^
- Jeff, Jeff, Jeff... You wern't listening... The 10.14 xtals _only_
- come from older 23CH _XTAL_ CB's, not the synthesised ones! I never
- immagined that my CB knowledge would come in handy...
-
- > circuits I posted for, say, 40M and change L and C in the tank and filter
- > sections so they're resonant in the 30M band. 30M seems awfully quiet
- > from my QTH here in Hawaii; even last month while I was in California
- > that band was dead. Let's put some life into it!
- >
- I can't opperate 30M because I'm only a No-Code, but if someone supplies
- my with schematics, I will build a few 30M Xtal Xmitters, and sell _or_
- raffle off the xmiters to the group only.
- >
- > Jeff NH6IL
- >
- Andy (also known as a few other things)
- --
- Mesmerized by a decade of hate, ! AMATEUR = N8OFS
- Flowers and remorse, ! ARMY MARS = AAN5HJT
- Fading vision lost in time, ! CB = THE NEON KNIGHT
- Tragedy on course!!! - Frontline Assembly ! HACKER = TH3 N30N KN16Ht
-
- From qrp-request@Think.COM Wed Jan 26 22:40:20 1994
- Return-Path: <mvjf@mvubr.att.com>
- Message-Id: <9401270340.AA15299@Early-Bird.Think.COM>
- From: mvjf@mvubr.att.com
- Date: Wed, 26 Jan 94 22:34 EST
- Original-From: mvubr!mvjf (James M Fitton +1 508 960 2577)
- To: QRP@Think.COM
- Subject: 40 Meters
-
-
- Chuck,
- Yes 40m has been RED hot.
- QRPers are easily working them. Never have
- imagined this type of DX.
-
- Congrats on your QRQ/QRP/QSO with W6....
- Lately some DX signals have sent the NorCal-40 into AGC mode.
- The Yugo station running 100W with a 4 el. beam
- and the station from Spain with 2 el. and 100w.
-
- On GLN, the 80 meter QRP net tonight run by NN1G, a
- German station checked in !!
-
- Can you imagine that..... on 80 M ?
-
- On 40 m, I worked countries #37 and 38 with the
- NorCal-40 running 4 watts.
-
- .
-
-
-
- 73/72 Jim Fitton, W1FMR QRP-NE mvjf@mvubr.att.com
-
- From qrp-request@Think.COM Wed Jan 26 23:17:29 1994
- Return-Path: <m.watt1@genie.geis.com>
- (1.37.109.4/15.6) id AA00631; Thu, 27 Jan 94 04:16:36 GMT
- From: m.watt1@genie.geis.com
- Message-Id: <9401270416.AA00631@relay2.geis.com>
- Date: Thu, 27 Jan 94 00:41:00 BST
- To: qrp@Think.COM
- Subject: QRP Logos
- X-Genie-Id: 4615560
- X-Genie-From: M.WATT1
-
- Anybody have or seen a PCX, BMP, or other desktop publishing files of QRP
- organizations, specifically the QRP ARCI? If so, please send e-mail to :
- M.WATT1@GENIE.GEIS.COM. I don't have full internet access, to FTP is not
- possible for me. Thanks for the assistance.
-
- Marty, KN4BH, Jackson, Tennessee
-
-
- From qrp-request@Think.COM Thu Jan 27 08:12:11 1994
- Return-Path: <mvjf@mvubr.att.com>
- Message-Id: <9401271312.AA03675@Early-Bird.Think.COM>
- From: mvjf@mvubr.att.com
- Date: Thu, 27 Jan 94 08:02 EST
- Original-From: mvubr!mvjf (James M Fitton +1 508 960 2577)
- To: QRP@Think.COM
- Subject: NC-40
-
-
- Oooops!
- The 40m dx is being worked with the NorCal at 2 Watts, not 4.
-
- Also found an Internet Mail server in my area that charges
- $20 every 6 months, with a maximum use of 90 minutes per day.
- That sounds incredible!!..... I will have to try it.
-
- With Low Band QRP-DX, Internet, and the NorCal-40 ......
- Miracles seem commonplace these days....
-
- What fantastic things will happen next ? Probably Dayton...
-
-
-
-
-
-
-
- 73/72 Jim Fitton, W1FMR QRP-NE mvjf@mvubr.att.com
-
- From qrp-request@Think.COM Thu Jan 27 10:14:14 1994
- Return-Path: <Frank.Milos@East.Sun.COM>
- id AA04482; Thu, 27 Jan 94 07:14:04 PST
- id AA06586; Thu, 27 Jan 94 07:14:02 PST
- id AA01043; Thu, 27 Jan 94 10:14:01 EST
- id AA17681; Thu, 27 Jan 94 10:13:59 EST
- id AA06389; Thu, 27 Jan 94 10:11:11 EST
- Date: Thu, 27 Jan 94 10:11:11 EST
- From: Frank.Milos@East.Sun.COM (Frank Milos - Sun USOPS CSU Manufacturing Engineering)
- Message-Id: <9401271511.AA06389@quirp.East.Sun.COM>
- To: QRP@Think.COM
- Subject: New Book
- Classification: Sun Proprietary: Internal Use Only
-
-
- I got a post card in the mail yesterday advertising a new book
- containing mods for the HW-7,8,9. Thought I would pass the info along
- in case anyone with the rig had any interest.
-
- Here is the scoop:
-
- THE HW-8 HANDBOOK is a collection of mods for the HW-7, -8, -9 QRP
- rig. Over 50 pages of mods and tips.
-
- COST $11.00 (includes first class mail to your door)
-
- Order from Sunlight Energy Systems
- 2225 Mayflower NW
- Massillon,OH 44647
-
- Standard disclaimer - I have no affiliation with Sunlight Energy Systems,
- have not seen the book, but thought I share the information.
-
- 72
-
- Frank - NO1E
-
-
-
- From qrp-request@Think.COM Thu Jan 27 10:40:14 1994
- Return-Path: <Frank.Milos@East.Sun.COM>
- id AA08024; Thu, 27 Jan 94 07:40:09 PST
- id AA07811; Thu, 27 Jan 94 07:40:07 PST
- id AA03462; Thu, 27 Jan 94 10:40:06 EST
- id AA18169; Thu, 27 Jan 94 10:40:04 EST
- id AA06398; Thu, 27 Jan 94 10:37:16 EST
- Date: Thu, 27 Jan 94 10:37:16 EST
- From: Frank.Milos@East.Sun.COM (Frank Milos - Sun USOPS CSU Manufacturing Engineering)
- Message-Id: <9401271537.AA06398@quirp.East.Sun.COM>
- To: QRP@Think.COM
- Subject: Re: NC-40
- Classification: Sun Proprietary: Internal Use Only
-
-
- In his mail, Jim, W1FMR, writes:
-
- "Yes 40m has been RED hot.
-
- <Stuff Deleted>
-
- On 40 m, I worked countries #37 and 38 with the
- NorCal-40 running 2 watts."
-
- The NC-40 sounds like a great rig and have gotten confirmation from
- Jim Cates that I'm on the list for delivery next month.
-
- I almost worked a 9A2 (don't know what country) on 40M 3 nights ago
- with an OHR HP DC xcvr at 1.5 W, but he couldn't quite pull me out of the
- mud.
-
- The one thing that seems to always be forgotten is the antenna. I was using
- an 80M delta loop fed at the apex (29') and the bottom at ~12. Its hanging
- in pine trees that give me a run for my money getting the wire into the
- branches every time I try to change toi a different antenna. If I remember
- correctly, Jim has in the past used a delta but is now using a Half Square
- or Bobtail Curtain. Even under the best of conditions, hunting dx is always
- easier if you have a good antenna and there is a big difference working dx with
- a dipole at 20 feet and a wire beam up 70 feet.
-
- I remember many years ago one of the magazines had an article about the
- importance of the antenna location in working dx and that it could be done
- with a simple dipole. Peaking my interest, I read on about all the pileups
- this ham worked and the thousands of contacts he made with a simple dipole up
- 30 feet. The last paragraph was the clincher when he said that his
- antenna was located on some tiny island where it was a rare call and he
- was one of the only hams. The antenna and location is important
- after all.
-
- Have a good day all!
-
- 72
-
- Frank - NO1E
-
- From qrp-request@Think.COM Thu Jan 27 11:40:13 1994
- From: dquagliana@attmail.com (os2user@vmdoug.utsd.att.com)
- Date: 27 Jan 94 16:23:22 GMT
- To: qrp@Think.COM
- Message-Service: mail
- id AA0115; Thu, 27 Jan 94 11:32:35 -0500
- Subject: A cheap L/C meter from frequency measurements
- Reply-To: dquagliana@attmail.com
- Return-Path: <os2user@vmdoug.utsd.att.com>
- Message-Id: <9401271632.AA0115@vmdoug.utsd.att.com>
- Content-Type: text
-
- I've heard that it is possible to build a simple inductance and
- capacitance meter by measuring the audio frequency of a LC audio
- oscillator. As I understand it, you use a known L and an
- unknown C ( or an unknown L and a known C ) and then measure the
- audio frequency generated by the oscillator. You then plug all the
- known values into a formula and solve for the unknown.
-
- Now: Has anyone actually built one of these? How did it work? About
- how (in)accurate was yours? Does anyone have a schematic for something
- like this?
-
- Yes, I realize that this sort of thing isn't going to have much accuracy.
- I'm not trying to measure individual component tolerances, but it
- would be nice if I could tell if it was a 47 pf or a 470 pf.
-
- Replies to qrp mailing list or email to dquagliana@attmail.com
-
- Douglas Quagliana
- dquagliana@attmail.com - I speak for myself, not for AT&T
-
-
- From qrp-request@Think.COM Thu Jan 27 13:20:57 1994
- Return-Path: <lakeith@wrdis01.robins.af.mil>
- id AA29019; Thu, 27 Jan 94 13:20:55 -0500
- Message-Id: <9401271820.AA29019@wrdis01.robins.af.mil>
- Date: Thu, 27 Jan 94 13:20:55 -0500
- From: lakeith@wrdis01.robins.af.mil (CONTRACTOR Larry Keith;653 CCSG/SCT)
- Subject: Re: A cheap L/C meter from frequency measurements
- To: dquagliana@attmail.com
- Cc: qrp@Think.COM
- X-Orig-Date: 27 Jan 94 16:23:22 GMT
- X-Orig-From: dquagliana@attmail.com (os2user@vmdoug.utsd.att.com)
- X-Orig-Message-Id: <9401271632.AA0115@vmdoug.utsd.att.com>
-
- In your message of 27 Jan 1994 at 1307 EST, you write:
- > I've heard that it is possible to build a simple inductance and
- > capacitance meter by measuring the audio frequency of a LC audio
- > oscillator. As I understand it, you use a known L and an
- > unknown C ( or an unknown L and a known C ) and then measure the
- > audio frequency generated by the oscillator. You then plug all the
- > known values into a formula and solve for the unknown.
- >
- A simpler solution is a 12VAC xfmr hooked in series with a 10 meg
- resistor and the unknown component. Measure voltage drop across
- resistor to get current. Measure voltage drop across unknown
- component. Compute Z = E/I. Use Z formula to compute capacitance or
- inductance. If 10 meg resistor doesn't work, change to 1 meg, or 100
- meg, or 10k....
-
- remember the freq is 60 Hz.
-
-
- 73,
-
- Larry
-
- From qrp-request@Think.COM Thu Jan 27 13:43:36 1994
- Return-Path: <randy@cyphyn.radnet.com>
- id m0pPbei-0001SXC; Thu, 27 Jan 94 13:41 EST
- Message-Id: <m0pPbei-0001SXC@cyphyn.radnet.com>
- From: randy@cyphyn.radnet.com (Randy)
- Subject: Re: A cheap L/C meter from frequency measurements
- To: dquagliana@attmail.com
- Date: Thu, 27 Jan 1994 13:41:27 -0500 (EST)
- Cc: qrp@Think.COM (qrp @think.com)
- In-Reply-To: <9401271632.AA0115@vmdoug.utsd.att.com> from "os2user@vmdoug.utsd.att.com" at Jan 27, 94 04:23:22 pm
- X-Mailer: ELM [version 2.4 PL21]
- Content-Type: text
- Content-Length: 566
-
- YES! I made a similar ckt...1st one uses a bridge ckt and is good only for
- caps ( coils DC ohms messes up the true null in such a ckt) but another
- one I did up was as you said...but was a low freq RF job...run to freq
- counter etc..
-
- Give me time to do up the 2 diagrams here and I send em out...ok?
-
- --
- Randy KA1UNW If you get a shock while
- servicing your equipment, "Works for me!"
- randy@192.153.4.200 DON'T JUMP! -Pete Keyes
- You might break an expensive tube!
-
- From qrp-request@Think.COM Thu Jan 27 14:30:39 1994
- Return-Path: <gc@fox.gsfc.nasa.gov>
- id AA25403; Thu, 27 Jan 94 14:30:33 -0500
- id AA03699; Thu, 27 Jan 94 14:30:32 EST
- Date: Thu, 27 Jan 94 14:30:32 EST
- From: gc@fox.gsfc.nasa.gov (Gary Chatters)
- Message-Id: <9401271930.AA03699@fox.gsfc.nasa.gov>
- To: uunet!attmail.com!dquagliana@Think.COM
- Subject: Re: A cheap L/C meter from frequency measurements
- Cc: qrp@Think.COM
-
- Douglas asks about building an audio oscillator to measure
- an unknown L or C. If you already have a variable audio
- oscillator on your test bench, here is a scheme you might try.
- I threw it together in about 10 minutes after reading the post
- to the list. However, I have not made any real practical use
- of it.
-
- Equipment needed:
-
- Variable frequency audio oscillator
-
- AC voltmeter (high impedence)
-
- A resistor (I used 100K ohm)
-
- Known L and unknown C or vice versa.
-
- Bunch of clip leads.
-
- Frequency counter (optional)
-
- Procedure:
-
- Hook up L and C in parallel circuit.
-
- Feed LC circuit from oscillator through the 100k resistor
-
- Measure the voltage across the LC circuit.
-
- Tune the oscillator to find a voltage peak.
-
- Results of a test:
-
- I used an .088 h toroid coil and a 0.056 microfarad mylar cap
- in parallel feed through a 100k resistor.
-
- Measured resonant frequency: 2281 Hz.
-
- Using the formula L = 1.0/(4*Pi^2*f^2*C)
- (or L = 1.0/(4.0 * Pi**2 * f**2 * C) for FORTRAN users)
- and the similar formula for C the results are:
-
- Computed Labeled
- L 0.0869 h 0.088 h
-
- C 0.0553 ufd 0.056 ufd
-
- Comments:
-
- This can be a rather accurate method of measuring unknown
- L or C, which can make it difficult to use. I had to
- be within 10% of the resonant frequency to see a reading
- on the meter. It helped that I knew about where resonance would be.
-
- You can also measure the Q of the resonant circuit.
-
- Is this of any help?
-
- 73,
-
- Gary
-
- From qrp-request@Think.COM Thu Jan 27 14:41:53 1994
- Return-Path: <burdick@interval.com>
- Message-Id: <9401271941.AA07751@interval.interval.com>
- Date: Thu, 27 Jan 1994 11:40:22 -0800
- To: fkf1@cornell.edu (F. Kevin Feeney)
- From: burdick@interval.com (Wayne Burdick)
- Subject: Re: How's the second batch of NorCal's coming?
- Cc: qrp@Think.COM
-
- Kevin Feeney wrote:
-
- >I was wondering if you had any idea what the current status
- >of the second batch of Norcals was?
-
- We have all the parts for the NC40's kitted and ready to go, but I'm
- hand-delivering the custom boxes and PC boards to Jim Cates (who's mailing
- out the kits) next week. That means first shipments will be the first week
- of February. Sorry for the delay. (By the way--they're all sold out.)
-
- Let me know how it works (or doesn't--god forbid!) when you get it.
-
- 72,
- Wayne
-
-
-
- From qrp-request@Think.COM Thu Jan 27 14:45:03 1994
- Return-Path: <jpo@acd4.acd.com>
- (5.61/UUNET-internet-primary) id AAwaru26484; Thu, 27 Jan 94 14:44:54 -0500
- (queueing-rmail) id 144224.28547; Thu, 27 Jan 1994 14:42:24 EST
- id AA13192; Thu, 27 Jan 94 13:08:39 EST
- From: jpo@acd4.acd.com ( Jim Osburn )
- Message-Id: <9401271808.AA13192@IEDV5.acd.com>
- Subject: Re: New Book
- To: qrp@Think.COM (QRP Mailing List)
- Date: Thu, 27 Jan 94 13:08:38 EST
- In-Reply-To: <9401271511.AA06389@quirp.East.Sun.COM>; from "Frank Milos - Sun USOPS CSU Manufacturing Engineering" at Jan 27, 94 10:11 am
- X-Mailer: ELM [version 2.3 PL11]
-
- > Here is the scoop:
- >
- > THE HW-8 HANDBOOK is a collection of mods for the HW-7, -8, -9 QRP
- > rig. Over 50 pages of mods and tips.
- >
- > COST $11.00 (includes first class mail to your door)
- >
- > Order from Sunlight Energy Systems
- > 2225 Mayflower NW
- > Massillon,OH 44647
- >
-
- I have a copy of that book.
- It's not new, I bought it at a hamfest last year.
- Mostly it's reprints of articles from various publications.
- It's a good book to have if you buy a used HW-8.
- It helps in figuring out the mods that have been made and why.
-
- 73,
-
- Jim, WD9EYB
-
- From qrp-request@Think.COM Thu Jan 27 18:42:29 1994
- Return-Path: <auratek!auratek.com!epacyna@uunet.UU.NET>
- (5.61/UUNET-internet-primary) id AAwask29499; Thu, 27 Jan 94 18:42:21 -0500
- (queueing-rmail) id 184014.8934; Thu, 27 Jan 1994 18:40:14 EST
- id AA07159; Thu, 27 Jan 94 15:09:17 EST
- Date: Thu, 27 Jan 94 15:09:17 EST
- From: epacyna@auratek.com (Edward Pacyna)
- Message-Id: <9401272009.AA07159@auratek.com>
- To: qrp@Think.COM, uunet!attmail.com!dquagliana@uunet.UU.NET
- Subject: Re: A cheap L/C meter from frequency measurements
-
- Doug
-
- There a numerous ways to measure L and C, and they can give quite accurate
- results. Here are a couple that come to mind.
-
- Measuring L
- -----------
-
- A couple of years ago, QST published an article for a inductance meter. The
- article was by Doug DeMaw was capable of directly reading L values for .1uH
- to hundreds of uH and worked as follows.
-
-
- Crystal Oscillator--------Parallel L/C Tuned Circuit-------Analog Meter
-
- The crystal oscillator was lightly coupled to a parallel tuned circuit which
- consisted of a high value variable capacitor and the unknown L. The capacitor
- was varied to find a peak on the meter. The dial was calibrated in uH because
- there is one equation for resonance and 2 of the 3 variables were know (F and
- C). The ranges were selected by switching different oscillator frequencies.
-
-
- Another way to measure L is to build a simple oscillator circuit with a
- fixed amount of capacitance. Then connect an unknown L and measure the
- frequency with a counter or calibrated receiver. Solve the resonance formula
- to determine L. You can also measure C values with this approach by using
- a known L, some know C and adding in the unknown C and taking before and
- after frequency readings (a single formula can be derived for this situation.
-
-
- BTW, the basic formula is: C = 1 / (L W^2) where W = 2 pie F
-
- A simple version is C = 25330.295 / (F^2 L) C in pF, L in uH, F in Mhz
-
- Note: The frequencies used in both above techniques need to be appropriate
- for the typical values being measured.
-
- Measuring C
- -----------
-
- For large vaues (e.g. .01uF to maybe 100uF) you can build a simple NE555
- square wave generator. There are several "how to use the NE555" paper back
- books with typical circuits. Basically, an R C value determines the freq-
- uency. If you use a known R and measure the frequency, you can easily solve
- for C.
-
- Most of these books also have a real simple circuit using (3) NE555's that
- allows a frequency counter to read C directly. I built one a while back and it
- worked quite well and measured C values from a few pF to at least 100uF. It was
- also an educational experience as it used the NE555 as a square wave generator,
- a one shot and an integrator.
-
- Back issues of QST, Ham Radio and 73 magazine have lots of articles on this
- topic.
-
- 73
-
- Ed W1AAZ
-
-
- From qrp-request@Think.COM Thu Jan 27 19:37:55 1994
- Return-Path: <fmsystm!andrews@wariat.org>
- Thu, 27 Jan 94 19:36 EST for Think.COM!qrp
- id m0pPh9L-0000obC; Thu, 27 Jan 94 19:33 EST
- Message-Id: <m0pPh9L-0000obC@fms.com>
- From: andrews@fms.com (Andrew Sargent N8OFS)
- Subject: Re: 10.14 mhz xmtrs
- To: jherman@uhunix.uhcc.Hawaii.Edu (Jeff Herman)
- Date: Thu, 27 Jan 1994 19:33:27 -0500 (EST)
- Cc: qrp@Think.COM (QRP)
- In-Reply-To: <CMM.0.90.2.759649583.jherman@uhunix3.uhcc.Hawaii.Edu> from "Jeff Herman" at Jan 26, 94 07:46:22 pm
- Reply-To: andrews@telemax.com
- X-Mailer: ELM [version 2.4 PL21]
- Mime-Version: 1.0
- Content-Type: text/plain; charset=US-ASCII
- Content-Transfer-Encoding: 8bit
- Content-Length: 2260
-
- > Date: Wed, 26 Jan 94 19:46:22 HST
- > From: Jeff Herman <jherman@uhunix.uhcc.Hawaii.Edu>
- > To: andrews@telemax.com
- > Subject: Re: 10.14 mhz xmtrs
- > In-Reply-To: Your message of Wed, 26 Jan 1994 22:28:16 -0500 (EST)
- > Message-Id: <CMM.0.90.2.759649583.jherman@uhunix3.uhcc.Hawaii.Edu>
- > Content-Type: text
- >
- > Wrong wrong wrong, Andrew! The 10 MHz and 37 MHz xtals were mixed
- > to synthesize the 27 MHz signal! Yes, these xtals come from the older
- > 23 ch. CB rigs; the 23 xmt and rcv frequencies were gotten (synthesized)
- > by the formula: 37-10=27 MHz (and of course 37+10=47 which is filtered
- > out). So rather than 23 xmt xtals and 23 rcv xtals (=46) the manufacturers
- > were able to synthesize the required frequencies with only 16 xtals.
- >
- Hmmm... (I zink vat ve have here iz a failure to communicates) There
- is a difference in terminology between 'synthesised' and 'mixed'.
- 'synthesised' requires the use of a PLL & VCO. 'mixed' is what you
- reffered to above regarding the old 23 CH CB's. True, it is eiaser
- and cheaper to use 16 rocks rather than 46! (including cheaper too!)
- Keep in mind that _most_ 23 CH CB's (AM/SSB) had '_wierd_' xtal
- filters also (eg. 11.2735 or 10.6935 + a few others depending on
- brand and mfgr).
- >
- > Too bad that out of those 16 xtals only one falls in a ham band: 10.14 mc.
- >
- Unless you wanted to build a 5X xmitter for 6M!
- >
- > *****************************************************************************
- >
- > Commentary:
- > It seems that only a small handful of folks on here are homebrewing. Why
- > is that? There's so much talk of this kit or that kit, but so few speak
- > of building from scratch. Not enough time? Parts too hard to come by?
- > I got licensed in '76 but was building stuff (rcvrs) 10 years prior to
- > that. Am I too old fashioned to want to see hams still building at
- > least their xmtrs? Phooey!
- >
- > Jeff NH6IL
- >
- Commentary:
- I am _still_ a No-Code and proud of it. I am not to be confused with
- a 2M appliance opperator!
-
- --
- Mesmerized by a decade of hate, ! AMATEUR = N8OFS
- Flowers and remorse, ! ARMY MARS = AAN5HJT
- Fading vision lost in time, ! CB = THE NEON KNIGHT
- Tragedy on course!!! - Frontline Assembly ! HACKER = TH3 N30N KN16Ht
-
- From qrp-request@Think.COM Thu Jan 27 20:36:29 1994
- Return-Path: <auratek!auratek.com!epacyna@uunet.UU.NET>
- (5.61/UUNET-internet-primary) id AAwask29499; Thu, 27 Jan 94 18:42:21 -0500
- (queueing-rmail) id 184014.8934; Thu, 27 Jan 1994 18:40:14 EST
- id AA07159; Thu, 27 Jan 94 15:09:17 EST
- Date: Thu, 27 Jan 94 15:09:17 EST
- From: epacyna@auratek.com (Edward Pacyna)
- Message-Id: <9401272009.AA07159@auratek.com>
- To: qrp@Think.COM, uunet!attmail.com!dquagliana@uunet.UU.NET
- Subject: Re: A cheap L/C meter from frequency measurements
-
- Doug
-
- There a numerous ways to measure L and C, and they can give quite accurate
- results. Here are a couple that come to mind.
-
- Measuring L
- -----------
-
- A couple of years ago, QST published an article for a inductance meter. The
- article was by Doug DeMaw was capable of directly reading L values for .1uH
- to hundreds of uH and worked as follows.
-
-
- Crystal Oscillator--------Parallel L/C Tuned Circuit-------Analog Meter
-
- The crystal oscillator was lightly coupled to a parallel tuned circuit which
- consisted of a high value variable capacitor and the unknown L. The capacitor
- was varied to find a peak on the meter. The dial was calibrated in uH because
- there is one equation for resonance and 2 of the 3 variables were know (F and
- C). The ranges were selected by switching different oscillator frequencies.
-
-
- Another way to measure L is to build a simple oscillator circuit with a
- fixed amount of capacitance. Then connect an unknown L and measure the
- frequency with a counter or calibrated receiver. Solve the resonance formula
- to determine L. You can also measure C values with this approach by using
- a known L, some know C and adding in the unknown C and taking before and
- after frequency readings (a single formula can be derived for this situation.
-
-
- BTW, the basic formula is: C = 1 / (L W^2) where W = 2 pie F
-
- A simple version is C = 25330.295 / (F^2 L) C in pF, L in uH, F in Mhz
-
- Note: The frequencies used in both above techniques need to be appropriate
- for the typical values being measured.
-
- Measuring C
- -----------
-
- For large vaues (e.g. .01uF to maybe 100uF) you can build a simple NE555
- square wave generator. There are several "how to use the NE555" paper back
- books with typical circuits. Basically, an R C value determines the freq-
- uency. If you use a known R and measure the frequency, you can easily solve
- for C.
-
- Most of these books also have a real simple circuit using (3) NE555's that
- allows a frequency counter to read C directly. I built one a while back and it
- worked quite well and measured C values from a few pF to at least 100uF. It was
- also an educational experience as it used the NE555 as a square wave generator,
- a one shot and an integrator.
-
- Back issues of QST, Ham Radio and 73 magazine have lots of articles on this
- topic.
-
- 73
-
- Ed W1AAZ
-
-
- From qrp-request@Think.COM Thu Jan 27 20:57:03 1994
- Return-Path: <fmsystm!andrews@wariat.org>
- Thu, 27 Jan 94 19:36 EST for Think.COM!qrp
- id m0pPh9L-0000obC; Thu, 27 Jan 94 19:33 EST
- Message-Id: <m0pPh9L-0000obC@fms.com>
- From: andrews@fms.com (Andrew Sargent N8OFS)
- Subject: Re: 10.14 mhz xmtrs
- To: jherman@uhunix.uhcc.Hawaii.Edu (Jeff Herman)
- Date: Thu, 27 Jan 1994 19:33:27 -0500 (EST)
- Cc: qrp@Think.COM (QRP)
- In-Reply-To: <CMM.0.90.2.759649583.jherman@uhunix3.uhcc.Hawaii.Edu> from "Jeff Herman" at Jan 26, 94 07:46:22 pm
- Reply-To: andrews@telemax.com
- X-Mailer: ELM [version 2.4 PL21]
- Mime-Version: 1.0
- Content-Type: text/plain; charset=US-ASCII
- Content-Transfer-Encoding: 8bit
- Content-Length: 2260
-
- > Date: Wed, 26 Jan 94 19:46:22 HST
- > From: Jeff Herman <jherman@uhunix.uhcc.Hawaii.Edu>
- > To: andrews@telemax.com
- > Subject: Re: 10.14 mhz xmtrs
- > In-Reply-To: Your message of Wed, 26 Jan 1994 22:28:16 -0500 (EST)
- > Message-Id: <CMM.0.90.2.759649583.jherman@uhunix3.uhcc.Hawaii.Edu>
- > Content-Type: text
- >
- > Wrong wrong wrong, Andrew! The 10 MHz and 37 MHz xtals were mixed
- > to synthesize the 27 MHz signal! Yes, these xtals come from the older
- > 23 ch. CB rigs; the 23 xmt and rcv frequencies were gotten (synthesized)
- > by the formula: 37-10=27 MHz (and of course 37+10=47 which is filtered
- > out). So rather than 23 xmt xtals and 23 rcv xtals (=46) the manufacturers
- > were able to synthesize the required frequencies with only 16 xtals.
- >
- Hmmm... (I zink vat ve have here iz a failure to communicates) There
- is a difference in terminology between 'synthesised' and 'mixed'.
- 'synthesised' requires the use of a PLL & VCO. 'mixed' is what you
- reffered to above regarding the old 23 CH CB's. True, it is eiaser
- and cheaper to use 16 rocks rather than 46! (including cheaper too!)
- Keep in mind that _most_ 23 CH CB's (AM/SSB) had '_wierd_' xtal
- filters also (eg. 11.2735 or 10.6935 + a few others depending on
- brand and mfgr).
- >
- > Too bad that out of those 16 xtals only one falls in a ham band: 10.14 mc.
- >
- Unless you wanted to build a 5X xmitter for 6M!
- >
- > *****************************************************************************
- >
- > Commentary:
- > It seems that only a small handful of folks on here are homebrewing. Why
- > is that? There's so much talk of this kit or that kit, but so few speak
- > of building from scratch. Not enough time? Parts too hard to come by?
- > I got licensed in '76 but was building stuff (rcvrs) 10 years prior to
- > that. Am I too old fashioned to want to see hams still building at
- > least their xmtrs? Phooey!
- >
- > Jeff NH6IL
- >
- Commentary:
- I am _still_ a No-Code and proud of it. I am not to be confused with
- a 2M appliance opperator!
-
- --
- Mesmerized by a decade of hate, ! AMATEUR = N8OFS
- Flowers and remorse, ! ARMY MARS = AAN5HJT
- Fading vision lost in time, ! CB = THE NEON KNIGHT
- Tragedy on course!!! - Frontline Assembly ! HACKER = TH3 N30N KN16Ht
-
- From qrp-request@Think.COM Fri Jan 28 11:43:59 1994
- Return-Path: <ccm!Mark_E_Gustoff@intelhf.intel.com>
- (Smail3.1.28.1 #2) id m0pPwIN-000MOgC; Fri, 28 Jan 94 08:43 PST
- (Smail3.1.28.1 #1) id m0pPwKk-0000MFC; Fri, 28 Jan 94 08:46 PST
- Date: Fri, 28 Jan 94 08:46:14 PST
- From: Mark E Gustoff <Mark_E_Gustoff@ccm.hf.intel.com>
- Message-Id: <940128084614_12@ccm.hf.intel.com>
- To: qrp@Think.COM
- Subject: QRP Plus Features
-
-
- Text item: Text_1
-
- We've all heard rumors of a QRP version of the
- Ten-Tec Scout being announced soon. What would
- you all say if it contained a list of features
- like below:
-
- Bands: 160-10M w/WARC & 1.8 - 29.7 Gen Coverage
- Size: 5-1/2"W x 4"H x 6"D
-
- On Rear Panel:
-
- Power: 12VDC 2.5mm X 5.5mm power plug
- 1A Transmit
- 140mA Receive
- Fuse: 3AG 4A fast blow fuse
- RF Pwr: Pot adjusts from 0-5W
- Keying: 1/4" jack for straight key
- 3.5mm stereo jack for paddles
- Microphone: 3.5mm stereo jack
- Mic Gain: Adjustable
- Antenna: BNC connector for RX/TX
- Separate RX antenna jack
- Sidetone: Adjustment with level that tracks the
- front volume control.
-
-
- On Front Panel:
-
- LCD Display (Resolution to 6 digits)
- Pwr/Volume Knob
- Main VFO Knob
- Power/S Meter
- Earphone Jack (3.5mm)
- Memory Button (20 memories)
- Tuning Speed Button (Fast/Normal)
- 20dB Attenuator Switch
- 3-way Transceive/RIT/Split Switch
- Filter Button (100hz-2400hz variable bandwidth)
-
-
- This radio is single conversion synthesized digital
- with 6 pole crystal ladder filter, and SCAF digital
- filters at audio. Transmitter output is via a power
- MOSFET.
-
- Its modes are full break-in CW and SSB. It contains
- lithium battery backup of memory settings.
-
- The size makes it a nice fit, even in newer compact
- automobiles if you desire a mobile setup.
-
- Sorry, this is not the new rumored QRP rig by Ten-Tec.
-
- However, it is some serious competition for Ten-Tec.
- The rig is known as the QRP-PLUS. I've gleened the
- above data from the instruction manual I just received
- in the mail.
-
- The radio sells for $595.
-
- If you're interested, call or write for brochure on
- the QRP PLUS
-
- Index Laboratories
- 9318 Randall Dr. NW
- Gig Harbor, WA 98332
-
- (206) 851-5725
-
- P.S. I am not affilliated with Index Laboratories in
- any capacity de WO7T/QRP
-
-
- Mark_E_Gustoff@ccm.hf.intel.com
-
- From qrp-request@Think.COM Fri Jan 28 12:07:39 1994
- Return-Path: <bmitchel@CBA.Kodak.COM>
- id AA02477; Fri, 28 Jan 94 11:56:29 -0500
- Reply-To: bmitchel@CBA.Kodak.COM
- (5.65c/IDA-1.4.4); Fri, 28 Jan 1994 07:18:19 -0500
- Date: Fri, 28 Jan 1994 07:18:19 -0500
- From: Brad Mitchell <bmitchel@CBA.Kodak.COM>
- Message-Id: <199401281218.AA00337@hobby1.cba.kodak.com>
- To: qrp@Think.COM, dquagliana@attmail.com
- Subject: Re: A cheap L/C meter from frequency measurements
-
- >
- > I've heard that it is possible to build a simple inductance and
- > capacitance meter by measuring the audio frequency of a LC audio
- > oscillator. As I understand it, you use a known L and an
- > unknown C ( or an unknown L and a known C ) and then measure the
- > audio frequency generated by the oscillator. You then plug all the
- > known values into a formula and solve for the unknown.
- >
- > Now: Has anyone actually built one of these? How did it work? About
- > how (in)accurate was yours? Does anyone have a schematic for something
- > like this?
- >
- > Yes, I realize that this sort of thing isn't going to have much accuracy.
- > I'm not trying to measure individual component tolerances, but it
- > would be nice if I could tell if it was a 47 pf or a 470 pf.
- >
- > Replies to qrp mailing list or email to dquagliana@attmail.com
- >
- > Douglas Quagliana
- > dquagliana@attmail.com - I speak for myself, not for AT&T
- >
- >
-
- I just built the Doug Demaw Cap meter and it seems to work very good.
- The only problem is is that I need to find a 50 ua meter to complete
- the project, but in the mean time, I'll use my digital ua meter to
- suffice that I won't use the wrong cap in a project. This meter uses
- a 2-3mhz oscillator and a fixed inductance to cause resonance, or max current
- flow at 1000pf (The intended max measurment)
- It also has been designed to distribute the capacitance
- measurements uniformly over the 50 ua range, or at least somewhat uniformly.
- I don't remember what year/month the meter is, but I'll look tonight.
- There is also another article that Doug Demaw wrote for an inductance meter
- as well, and I have that dog eared as well. I'll try to get that info soon.
- 73
- -----------------
- | ___ ________ | Bradley S. Mitchell WB8YGG
- | | / / | | Eastman Kodak Company
- | | / / | | KEMD Electronic Products
- | |< < K O D A K| | Circuit Board Assembly Dept. 606 Test Engineering
- | | \ \ | | 901 Elmgrove Road Rochester, N.Y. 14653-5211
- | |__\ \________| | (716) 726-5775, FAX (716) 726-7109
- | | INTERNET: bmitchel@kodak.com
- -----------------
-
-
- From qrp-request@Think.COM Fri Jan 28 14:17:44 1994
- Return-Path: <jherman@uhunix.uhcc.Hawaii.Edu>
- id AA18885; Fri, 28 Jan 94 09:17:20 HST
- id AA08033; Fri, 28 Jan 94 09:17:20 HST
- Date: Fri, 28 Jan 94 9:17:19 HST
- From: Jeff Herman <jherman@uhunix.uhcc.Hawaii.Edu>
- To: QRP@Think.COM
- Cc: randy@cyphyn.radnet.com, pjk@cyphyn.radnet.com, psc@colmiks.colmiks.com
- Subject: L/C meters
- Message-Id: <CMM.0.90.2.759784639.jherman@uhunix3.uhcc.Hawaii.Edu>
-
- All these neat ideas for measuring L and C are great! And here I've been
- trying to determine the values of variable caps by measuring the plate
- area and dx between plates; sheesh! I'm still perplexed as to why cap
- manufacturers don't indicate the rane of values of a variable cap on the
- body of the cap itself.
- Anyway, thanks Gang for all the great ideas.
-
- Jeff NH6IL
- Vietnamese proverb: If you study you will become what you wish; if you do
- not study you will never become anything.
-
- From qrp-request@Think.COM Fri Jan 28 14:58:17 1994
- Return-Path: <OSYSMAS@MVS.OAC.UCLA.EDU>
- Message-Id: <9401281958.AA12413@Early-Bird.Think.COM>
- with BSMTP id 1913; Fri, 28 Jan 94 11:58:23 PST
- Date: Fri, 28 Jan 94 11:57 PST
- To: qrp@Think.COM(QRP)
- From: Michael Stein <OSYSMAS@MVS.OAC.UCLA.EDU>
- Subject: Re: 10.14 mhz xmtrs
-
- > Hmmm... (I zink vat ve have here iz a failure to communicates)
- > There is a difference in terminology between 'synthesised' and
- > 'mixed'. 'synthesised' requires the use of a PLL & VCO.
-
- Perhaps in advertising, but not in reality (in the field).
-
- The old CB's used a simple mixing scheme to generate their
- frequencies, however this is/was a valid (incoherent) synthesis
- technique and was used for many purposes other than CBs before
- the current PLL & Coherent synthesis became popular (or
- practical/known).
-
- There are many frequency synthesis techniques other than the PLL
- which most people have seen. Some of these techniques include
- brute-force, harmonic, double-mix, triple-mix, and
- double-mix-divide. These have different trade-offs than PLLs.
- These usually cost more...
-
- From qrp-request@Think.COM Fri Jan 28 15:11:40 1994
- Return-Path: <auratek!auratek.com!epacyna@uunet.UU.NET>
- (5.61/UUNET-internet-primary) id AAwavo23958; Fri, 28 Jan 94 15:11:14 -0500
- (queueing-rmail) id 141745.6193; Fri, 28 Jan 1994 14:17:45 EST
- id AA17901; Fri, 28 Jan 94 13:52:25 EST
- Date: Fri, 28 Jan 94 13:52:25 EST
- From: epacyna@auratek.com (Edward Pacyna)
- Message-Id: <9401281852.AA17901@auratek.com>
- To: uunet!Think.COM!qrp@uunet.UU.NET
- Subject: NN1G Bake-Off
- Cc: ed@auratek.com
-
-
- I continue to make more changes to the NN1G Mark II that I am building. The
- most recent is to the band pass filter between the antenna and RX mixer. The
- problem here is the use of the IF transformers in this circuit. The objective
- of the filter is to provide selectivity to keep strong out of band signals
- from overloading the mixer and eliminate the mixer's image response. At the
- same time, insertion loss needs to be kept to a minimum. By using the IF
- transformers, the best you could hope for is a very compromised result. This
- is because proper design requires specific conditions of loading, coupling,
- design Q etc.. Pre-selection and band pass filter design is well covered in
- Solid State Design for the Radio Amateur (Appendix and chapter on advanced
- receiver concepts). By using the IF transformers, you do not know or can you
- control the important parameters to design a good filter. For example, the
- primary to secondary turns ratio is fixed at 7:1 ( Z ratio of 49:1). So your
- 50 ohm antenna loads the first tuned circuit to 2,450 ohms (50 x 49) and the
- mixer loads the second tuned circuit to 147,000 ohms (3000 x 49). Each tuned
- circuit should have the same loading and it is determined by the required
- filter response and components. Then, the mixer and antenna should be matched
- for maximum power transfer.
-
- Turns out the IF transformer is not even correct for use on the output of the
- IF amp.. The MC1350 gain (and stability) is determined by the load it sees.
- At 10Mhz, around 6 to 8K produces about 50dB of gain. Higher loads result in
- amp. regeneration, increased noise and oscillation. With a 49:1 ratio, the
- product detector's 1500 ohm input presents a load of 73,500 ohms to the IF
- amp.! This is why it was necessary to include a swamping resistor to the
- circuit.
-
- I have replaced the specified transformers with toroids and capacitors.
-
- How much difference in performance will there be between a stock NN1G and
- one built by the book? While exacting measurements will surely favor the
- theory, will the changes be apparent in use?
-
- I would be very interested is comparing my completed unit to a stock NN1G.
- I would just like to do some simple A vs B testing in the following areas.
- -Stability
- -Weak signal reception (noise floor)
- -Weak signal reception near strong signal
- -Reception of multiple strong signals
- -Selectivity
- etc..
-
- Anyone in the Boston area with a 40M stock NN1G willing to help test?
-
- 73
-
- Ed W1AAZ
-
-
-
-
-
-
- From qrp-request@Think.COM Fri Jan 28 19:18:07 1994
- Return-Path: <msdooley@rockdal.aud.alcatel.com>
- id AA20210; Fri, 28 Jan 94 18:16:07 CST
- Date: Fri, 28 Jan 94 18:16:07 CST
- From: msdooley@rockdal.aud.alcatel.com (Michael S. Dooley)
- Message-Id: <9401290016.AA20210@aud.alcatel.com>
- To: qrp@Think.COM
- Subject: Newsletters
-
- Have you guys gotten your QRPp and QRP Quarterly newsletters? I
- haven't seen mine lately and am wondering if I missed them or am
- losing my mind... hmmm... the latter IS a possibility...
- Mike Dooley KE4PC
- msdooley@rockdal.aud.alcatel.com
- Princeton, Texas
-
- From qrp-request@Think.COM Fri Jan 28 22:23:54 1994
- Return-Path: <jaevans@clark.net>
- id AA18332; Fri, 28 Jan 94 22:20:19 EST
- Date: Fri, 28 Jan 1994 22:20:19 -0500 (EST)
- From: "John A. Evans" <jaevans@explorer.clark.net>
- Subject: Re: Newsletters
- To: "Michael S. Dooley" <msdooley@rockdal.aud.alcatel.com>
- Cc: qrp@Think.COM
- In-Reply-To: <9401290016.AA20210@aud.alcatel.com>
- Message-Id: <Pine.3.89.9401282250.A17897-0100000@explorer>
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; charset=US-ASCII
- Content-Length: 1231
-
-
-
- On Fri, 28 Jan 1994, Michael S. Dooley wrote:
-
- > Have you guys gotten your QRPp and QRP Quarterly newsletters? I
- > haven't seen mine lately and am wondering if I missed them or am
- > losing my mind... hmmm... the latter IS a possibility...
- > Mike Dooley KE4PC
- > msdooley@rockdal.aud.alcatel.com
- > Princeton, Texas
- >
-
- Have not received any QRP Quarterly since the July issue, so I wondered
- if I got dropped from the system. As for QRPp, I just became a member so
- don't know when to expect it. Both seem to be great pubs though. Just
- what I want to dive into after completing my MS thesis. &^)
-
- 73s
- john
-
- -------------------------------------------------------------------------------
- John A. Evans, Capt, USAF "My number one goal as a
- VHDL/EDA Engineer runner is to live long enough
- N3QOO Tech Plus !!! to place in my age group!!!"
-
- jaevans@clark.net Linux - the OS of choice !!
- -------------------------------------------------------------------------------
- Once data encryption is outlawed, only outlaws will have data encryption !!!
- -------------------------------------------------------------------------------
-
-
- From qrp-request@Think.COM Sat Jan 29 00:32:00 1994
- Return-Path: <dh@deneb.csustan.edu>
- id AA13523; Fri, 28 Jan 94 21:30:50 PST
- Date: Fri, 28 Jan 94 21:30:50 PST
- From: dh@deneb.csustan.edu (Doug Hendricks)
- Message-Id: <9401290530.AA13523@deneb.csustan.edu>
- To: qrp@Think.COM
- Subject: QRPp Mailing Date
-
- The mailing dates for QRPp are March 1, June 1, Sept. 1 and Dec. 1. The March
- issue is just about finished and I know you guys are anxious, but hey, give
- me a little slack! (GRIN). I will promise that the March issue will mail
- before March 1st. I too am wondering where my QRP Quarterly is. CUL, 72,
- Doug
-
- From qrp-request@Think.COM Sat Jan 29 00:45:42 1994
- Return-Path: <adams@chuck.dallas.sgi.com>
- for qrp@think.com id AA07458; Fri, 28 Jan 94 21:45:38 -0800
- for @sgi.sgi.com:qrp@think.com id AA23140; Fri, 28 Jan 94 23:45:35 -0600
- for @sgidal.dallas.sgi.com:qrp@think.com id AA25491; Fri, 28 Jan 94 23:45:35 -0600
- Date: Fri, 28 Jan 94 23:45:35 -0600
- From: adams@chuck.dallas.sgi.com (Chuck Adams)
- Message-Id: <9401290545.AA25491@chuck.dallas.sgi.com>
- To: qrp@Think.COM
- Subject: Publications
-
-
- Gang,
-
- Friday nite, 1/28/94, no QQ from QRP ARCI.
-
- QRPp will not be out til March 1994.
-
- BUT, I did get in the box, just 30 minutes ago (near midnight),
- the latest and greatest xcvr from MXM Industries. This is for
- 20M and I'll have it going by Sunday. If you want to try a
- schedule, send me email. Of course, not during the period when
- Dallas will beating up on the Buffalo Bills. :-) Joking gang,
- just joking. I'm still a Bears fan.
-
- Everybody stay warm. We're expecting snow here in Dallas. We've
- had snow the last weekend in Oct, Nov, Dec, and now Jan. Hope
- we're through in Feb.
-
- dit dit bcnu agn
-
- Chuck Adams K5FO CP-60 wpm
- adams@sgi.com
-
-
-
-
- From qrp-request@Think.COM Sat Jan 29 07:15:31 1994
- Return-Path: <nshore!seastar!jjw@usenet.INS.CWRU.Edu>
- id AA02385; Sat, 29 Jan 94 07:15:23 -0500 (from nshore!seastar!jjw for qrp@think.com)
- id m0pQEQj-0001AIC; Sat, 29 Jan 94 07:05 EST
- id m0pPv0R-0000nWC; Fri, 28 Jan 94 09:21 CST
- Message-Id: <m0pPv0R-0000nWC@seastar.org>
- From: jjw@seastar.org (John Welch)
- To: qrp@Think.COM
- Date: Fri Jan 28 09:21:10 1994
-
- Newsgroups: qrp
- Path: jjw
- From: jjw@seastar.org (John Welch)
- Subject: 'Synthesized' radios (was 10.14 mhz xmtrs)
- Reply-To: jjw@seastar.org (John Welch)
- Organization: Welch Research.
- Distribution: local
- Date: Fri, 28 Jan 1994 15:21:07 GMT
- Message-ID: <CKCIn7.52F@seastar.org>
- Followup-To: qrp
- References: <m0pPh9L-0000obC@fms.com>
- Lines: 18
-
- As quoted from <m0pPh9L-0000obC@fms.com> by nshore!usenet.INS.CWRU.Edu!fms.com!andrews (Andrew Sargent N8OFS):
-
- > Hmmm... (I zink vat ve have here iz a failure to communicates) There
- > is a difference in terminology between 'synthesised' and 'mixed'.
- > 'synthesised' requires the use of a PLL & VCO. 'mixed' is what you
- > reffered to above regarding the old 23 CH CB's. True, it is eiaser
- > and cheaper to use 16 rocks rather than 46! (including cheaper too!)
- > Keep in mind that _most_ 23 CH CB's (AM/SSB) had '_wierd_' xtal
- > filters also (eg. 11.2735 or 10.6935 + a few others depending on
- > brand and mfgr).
-
- There *is* a different way to have a 'synthesized' radio - use
- a Direct Digital Synthesizer (DDS). Requires no PLL or VCO, yet is
- considered 'synthesized'. BTW, they work quite well not only for
- radios but for home-built test equipment.
-
- --
- John Welch, N9JZW
-
-
- From qrp-request@Think.COM Sat Jan 29 07:24:10 1994
- Return-Path: <bapplega@isd.csc.com>
- Date: Sat, 29 Jan 94 07:30:06 EST
- From: bapplega@isd.csc.com (Bob Applegate)
- id AA05356 for qrp@think.com; Sat, 29 Jan 94 07:30:06 EST
- Message-Id: <9401291230.AA05356@isd.csc.com>
- To: qrp@Think.COM
- Subject: 20m & 40m rig designs?
-
- Hi Gang,
-
- I'm looking for a source of schematics for a 20m & 40m QRP rig. These
- are the features I'd like to have:
-
- 20 or 40 meter coverage with a flip of a switch.
-
- VFO tuning of the CW portions of the bands, plus RIT.
-
- Power ouput in the 2 watt range (no QRPppppp...).
-
- Decent receiver (no DC designs).
-
- Do any of you know if such an animal has been published? Has anyone
- homebrewed this sort of design?
-
- Thanks es 73,
- Bob, WA2ZZX
-
-
- From qrp-request@Think.COM Sat Jan 29 15:45:32 1994
- Return-Path: <dick@kanga.demon.co.uk>
- Date: Sat, 29 Jan 94 20:33:47 GMT
- Message-Id: <786511@kanga.demon.co.uk>
- From: dick@kanga.demon.co.uk (Dick G0BPS)
- Reply-To: dick@kanga.demon.co.uk
- To: qrp@Think.COM
- Subject: Scout wanted
- X-Mailer: PCElm 1.08
- Lines: 12
-
- HI gang,
- After my msg abt vacation in Dom Rep (HI) and perhaps Haiti(HH)
- I am getting a little despondant. It appears that I may not get a
- licence, from comments made. Oh well.... If I can I would like to
- take a Scout 515, they can be wound down to 4watts but also the
- 50 will be usefull on SSB. So,......
-
- Wanted loan or buy.... Scout 515 with lots of band modules.
- Guaranteed to return it if loaned. Many friends on here just ask
- for comments.
- 72 de Dick
- Dick G0BPS
-
- From qrp-request@Think.COM Sat Jan 29 19:36:37 1994
- Return-Path: <randy@cyphyn.radnet.com>
- id m0pQQ7P-0001nfC; Sat, 29 Jan 94 19:34 EST
- Message-Id: <m0pQQ7P-0001nfC@cyphyn.radnet.com>
- From: randy@cyphyn.radnet.com (Randy)
- Subject: oops! Thats qrp
- To: qrp@Think.COM (qrp @think.com)
- Date: Sat, 29 Jan 1994 19:34:26 -0500 (EST)
- X-Mailer: ELM [version 2.4 PL21]
- Content-Type: text
- Content-Length: 895
-
-
- I was on 3700 and 3710kc tonite, and YES indeed, there is a Novice Roundup
- going on.
- While on 3710, K3KMO leapt upon me as I was tuning up my 6AG7 and figgered I
- was a Novice or tech with his fingers stuck in the holes of a rig....
- (getting tuned up on such a rig, it makes some starnge noises)...as I was
- breifly on 3700kc too, but being real busy, I bailed out, and went to 3710.
-
- Well, we had a nice breif qso, as he was OUT to GET Novices! And as I was
- ...well, what ever I am, with a wooden board full of Fhanstock clips and
- it transmits....
- ... I was maybe too much for him!! Yark! yark!
-
- He's gonna get a card ANYway!
-
-
- --
- Randy KA1UNW If you get a shock while
- servicing your equipment, "Works for me!"
- randy@192.153.4.200 DON'T JUMP! -Pete Keyes
- You might break an expensive tube!
-
- From qrp-request@Think.COM Sat Jan 29 21:41:25 1994
- Return-Path: <gc@fox.gsfc.nasa.gov>
- id AA11260; Sat, 29 Jan 94 21:41:21 -0500
- id AA01580; Sat, 29 Jan 94 21:41:19 EST
- Date: Sat, 29 Jan 94 21:41:19 EST
- From: gc@fox.gsfc.nasa.gov (Gary Chatters)
- Message-Id: <9401300241.AA01580@fox.gsfc.nasa.gov>
- To: qrp@Think.COM
- Subject: Mobile CW (Was: oops! that's qrp)
-
- Randy writes:
-
- >While on 3710, K3KMO leapt upon me as I was tuning up my 6AG7 and figgered I
- >was a Novice or tech with his fingers stuck in the holes of a rig....
-
- Operating CW mobile from his motorcycle? Maybe from the van in
- this weather. :-)
-
- [I know this is getting off on a tangent but:] I was never such a good
- CW operator that I would even really think of doing CW mobile, but I really
- do like to see people do things like that to show it can be done.
-
- How many in this group do CW mobile (not necessarily motorcycle)?
-
- Hmmmm, I guess the appropriate activity for this group would be
- bicycle QRP CW mobile. Now, there's a project for next summer. :-)
-
-
- 73,
-
- Gary
-
- From qrp-request@Think.COM Sun Jan 30 03:04:09 1994
- Return-Path: <randy@cyphyn.radnet.com>
- id m0pQX6V-0001nyC; Sun, 30 Jan 94 03:01 EST
- Message-Id: <m0pQX6V-0001nyC@cyphyn.radnet.com>
- From: randy@cyphyn.radnet.com (Randy)
- Subject: Re: Mobile CW (Was: oops! that's qrp)
- To: gc@fox.gsfc.nasa.gov (Gary Chatters)
- Date: Sun, 30 Jan 1994 03:01:57 -0500 (EST)
- Cc: qrp@Think.COM (qrp @think.com)
- In-Reply-To: <9401300241.AA01580@fox.gsfc.nasa.gov> from "Gary Chatters" at Jan 29, 94 09:41:19 pm
- X-Mailer: ELM [version 2.4 PL21]
- Content-Type: text
- Content-Length: 750
-
- >
- > Operating CW mobile from his motorcycle? Maybe from the van in
- > this weather. :-)
- >
- He did not sign mobile.... but it was indeed k3kmo , as he sent it several
- times.
-
- Wait! Is that the guy who's been doing CW on a 'cycle? Oh my...no WONDER
- every now and then the cw would be....well....like going over some bumps!
-
- OH my goodness! whats he doing out in this weather on a cycle?...well you
- said Van... boy, he sure came in good, for what ever ant he must have
- had to have...
-
- --
- Randy KA1UNW If you get a shock while
- servicing your equipment, "Works for me!"
- randy@192.153.4.200 DON'T JUMP! -Pete Keyes
- You might break an expensive tube!
-
- From qrp-request@Think.COM Sun Jan 30 04:13:03 1994
- Return-Path: <dh@deneb.csustan.edu>
- id AA14461; Sun, 30 Jan 94 01:11:53 PST
- Date: Sun, 30 Jan 94 01:11:53 PST
- From: dh@deneb.csustan.edu (Doug Hendricks)
- Message-Id: <9401300911.AA14461@deneb.csustan.edu>
- To: qrp@Think.COM
- Subject: March QRPp Table of Contents
-
- Here is the final table of contents for the March issue of QRPp, Journal of
- the NorCal QRP Club. It will be mailed before March 1st. If you are
- interested in subscribing, send $5 for 4 issues per year to Jim Cates,
- WA6GER, 3241 Eastwood Rd., Sacramento, CA 95821. That will make you a member
- of NorCal. Please include your name, call & address. Foreign subscriptions
- are $15 per year, but are mailed airmail. This issue is 72 pages.
-
- From the Editor, Doug Hendricks, KI6DS 3
- Low Cost Wattmeter, Richard Urmonas, VK3DRU 4
- "Incidentally, What is a 10-10 Award", Duane Mantick, WB9OMC 4
- Characterizing Station Performance, Howie Cahn, WB2CPU 5
- QRP Club List, Chuck Adams, K5FO 6
- HW8 + T50-6 + ECG488 = 5 Watts, Gary Borich, W5UDV 10
- NN1G Up and Running, Paul Mackanos, K2DB 12
- QRP = Cross Country Skiing, Kalman Landon, WD6CZI 13
- TenTec Kits, Jeff Gold, AC4HF 14
- ARCI Sprint, Peter Hardie, VE5VA 14
- CQ-WW-CW Results for AA2U, Randy Rand, AA2U 15
- MI QRP Contest, Brad Mitchell, WB8YGG 15
- Michigan QRP Contest, Jeff Gold, AC4HF 16
- RadioKit QRP20, A Review, Jeff Gold, AC4HF 16
- Hambrew & QRPp Review, Chuck Adams, K5FO 17
- Kits vs. Homebrew, Gary Diana, N2JGU 18
- SSB Contesting in ARRL Sweepstakes, Jeff Gold, AC4HF 19
- Building the NN1G Mark II, Brad Mitchell, WB8YGG 19
- CMOS Super Keyer II, A Review, Jeff Gold, AC4HF 20
- SS '93, Chuck Adams, K5FO 21
- 93 Sweepstakes Report, Warren Lewis, KD4YRN 23
- 93 Sweepstakes, Bob Applegate, WA2ZZX 23
- My Favorite CW Contest, Jeff Gold, AC4HF 23
- My Account of SS, Mark Cronenwett, KA7ULD 24
- Another SS Story, Ron Majewski, WB8RUQ 24
- 93 SS, Greg Taylor, KD4HZ 25
- TenTec Scout - QRP???, Dave Redfern, N4ELM 25
- MFJ-1786 HI-Q Loop, David Baker, AB5PI 25
- MFJ-1786 HI-Q Loop, John Welch, N9JZW 27
- My Version of the MFJ Loop, Tom Farish, KJ5LT 28
- Bagging the NorCal 40 Kits, Jim Cates, WA6GER 29
- NorCal 40 Completed, Rich Mulvey, N2VDS 30
- Evaluation of the NorCal 40, Jeff Gold, AC4HF 31
- NorCal Revisited, Jeff Gold, AC4HF 32
- A Good Laugh with the NorCal 40, Jeff Gold, AC4HF 32
- Fix for Weak Audio in NC40, Wayne Burdick, N6KR 33
- NA Sprint with the NC40, Ron Majewski, WB8RUQ 33
- QRP Directional Wattmeter/Tuner, Jim Pepper, W6QIF 34
- Battling the Great QRP Epidemic, J.C. Smith, KC6EIJ 35
- NorCal 40 Mods, Bob Warmke, W6CYX 37
- Extra Audio for the NC40, Stan Cooper, K4DRD 38
- My NorCal 40, Todd Nichols, KB0HQU/VE3 39
- NorCal 40 Full Band Modification, Terry Young, KC6SOC 40
- QRP Plus Rig Review, Andrew Comas, KF2JH 41
- A 30 Meter VXO Transmitter, Roy Gregson, W6EMT 42
- The K6LV Homebrew Paddles, Doug Hendricks, KI6DS 46
- Tidbits, Hints for the QRPer, Mark Cronenwett, KA7ULD 47
- RadioKit Notes, Chuck Adams, K5FO 52
- RadioKit Review, Ed Pacyna, W1AAZ 53
- NN1G Notes, Ed Pacyna, W1AAZ 55
- A Curtis Keyer PCB, The Hard Way, Mac McClurkin, W7JDZ 56
- 350mW 40M CW Transmitter, Antonio Galindo, AC6G 58
- Winter Contesting, Rusty Smith, KD4GLC 61
- Operating in Barbados, Greg Taylor, KD4HZ 61
- Call For Articles, Doug Hendricks, KI6DS 62
- NorCal November Meeting, Jim Cates, WA6GER 63
- NorCal December Meeting, Doug Hendricks, KI6DS 63
- NorCal January Meeting, Doug Hendricks, KI6DS 65
- The MXM Transceiver Kit, Chuck Adams, K5FO 67
-
- Hope you enjoy this issue. By the way, the club now has 285 members,
- and sorry, but the NorCal 40 second run of 100 kits is sold out. (In less
- than 1 month). There will not be any more produced by the club, as we are
- moving on to our next club project, the Sierra All-Band CW Transceiver, a 6
- band rig being designed by Wayne Burdick, N6KR.
- 72, Doug, KI6DS, Editor, QRPp, Journal of the NorCal QRP Club
-
- From qrp-request@Think.COM Sun Jan 30 09:47:23 1994
- Return-Path: <JMG@tntech.edu>
- <01H8AD58FR9ODU6XYJ@tntech.edu>; Sun, 30 Jan 1994 08:50:04 CST
- Date: Sun, 30 Jan 1994 08:50:04 -0600 (CST)
- From: "JEFF M. GOLD" <JMG@tntech.edu>
- Subject: cw/mobile/qrp
- To: qrp@Think.COM
- Message-Id: <01H8AD58FR9QDU6XYJ@tntech.edu>
- X-Vms-To: IN%"qrp@think.com"
- X-Vms-Cc: JMG
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
- Content-Transfer-Encoding: 7BIT
-
- HI,
-
- I have been operating CW/Mobile/QRP for a couple of years now. I have a
- Ten Tec Argonaut 509, a keyer I built from the ARRL Handbook, and an
- audio filter that is from the Ten Tec design, but home built, because I
- couldn't find anyone to sell me one built. I have added some noise
- supression via Radio Shack kit.
-
- I use the Schurr solid brass, hand made mini-paddle on an old army? leg
- brace. .the paddles are the best I ever used.
-
- Sometimes when I really get into it, and I am in the middle of the
- busiest street in town, I just pull off into a parking lot. People are
- always stopping by to see what I am doing.. the car is now a little bit
- noticable with the Texas Bugcatcher on the back of a small Acura
- Integra. Previously I used a set of whips. The Bug Catcher seems to
- make the QRP up to 100 watt level.
-
- I ofter work a QSO on the way to work (7 miles), at lunch (a couple of
- miles then I stop where I am going to eat and finish the QSO) and on the
- way home.
-
- I have only been a ham for about 2 years, I certainly am no CW whiz..
- tell you what though.. it realy gets you copying in your head after a
- while.
-
- 72
-
- Jeff, AC4HF
-
- From qrp-request@Think.COM Sun Jan 30 16:05:20 1994
- Return-Path: <adams@chuck.dallas.sgi.com>
- for qrp@think.com id AA04658; Sun, 30 Jan 94 13:05:14 -0800
- for @sgi.sgi.com:qrp@think.com id AA28256; Sun, 30 Jan 94 15:05:06 -0600
- for @sgidal.dallas.sgi.com:qrp@think.com id AA02394; Sun, 30 Jan 94 15:05:05 -0600
- Date: Sun, 30 Jan 94 15:05:05 -0600
- From: adams@chuck.dallas.sgi.com (Chuck Adams)
- Message-Id: <9401302105.AA02394@chuck.dallas.sgi.com>
- To: qrp@Think.COM
- Subject: Hambrew
-
-
- Gang,
-
- last day of January and no January issue of Hambrew received.
- it's supposed to have several articles on the new MXM XCVR.
- i should have the 20M version finished shortly. i already have
- the 40 meter version. this is the $149.95 + $5.00 rig that
- i posted last year. time flies when you're having fun.
-
-
- p.s. 1/31/94 0521Z worked an F6 on 40M with 0.95W during their
- test. band was HOT HOT HOT......
-
- dit dit
- Chuck Adams K5FO CP-60 wpm
- adams@sgi.com
-
-
-
-
- From qrp-request@Think.COM Sun Jan 30 16:16:59 1994
- Return-Path: <adams@chuck.dallas.sgi.com>
- for qrp@think.com id AA05797; Sun, 30 Jan 94 13:16:54 -0800
- for @sgi.sgi.com:qrp@think.com id AA28277; Sun, 30 Jan 94 15:16:51 -0600
- for @sgidal.dallas.sgi.com:qrp@think.com id AA02433; Sun, 30 Jan 94 15:16:51 -0600
- Date: Sun, 30 Jan 94 15:16:51 -0600
- From: adams@chuck.dallas.sgi.com (Chuck Adams)
- Message-Id: <9401302116.AA02433@chuck.dallas.sgi.com>
- To: qrp@Think.COM
- Subject: Mobile CW
-
-
- Jeff and others have posted on mobile CW.
-
- If you have never tried it, you may want to take several small
- steps first.
-
- 1. Install rig in mode of transportation first. Volumes have
- been written on this. Use same for listening to and from
- work. JUST LISTEN. This will help you work on copying in
- the head and concentrate on driving. It's obvious which of
- these is life threatening. You'll find out several things first.
- You only need to catch key words - name, qth, rst, wx, ....
- Think about what you would say on your turn to transmit, if you
- were in QSO.
-
- 2. You'll probably hear the majority of people on the same time
- of day, frequency, etc. You'll know their life history as well
- as your own, their likes and dislikes, rigs, kids, etc.
-
- 3. Practice on remembering geographical areas heard, etc.
-
- 4. If the antenna receives well, it'll probably xmit well also.
- Check the SWR when you install the rig and monitor it. It will
- change over time and wx conditions.
-
- I did this on 10M mobile during the last sunspot peak. In fact,
- if you want to practice sending while driving, install 10M and
- practice on the low end of the band. It'll do two things. Give
- you practice without too large an audience and you'll be doing your
- part to keep the 'free banders' (individuals who don't give a toot
- about rules and regulations) away. Maybe they'll think you're some
- government agency, since we know what their stand on code is. :-)
- The 'free banders' that is.
-
- I have been hauling the NN1G on 40M to and from work with a
- hamstick for an antenna. Works quite well. Makes the 30 to 45 drive
- pass more quickly and I may try working with 1W mobile, but I don't
- expect too much success. I'm too spoiled with the 250' long wire.
-
- Just my two cents worth.
-
- Anyone remember the sunspot peak in 1957-1960 timeframe? Now
- those were the days. The next peak in 3 to 4 years. Don't let
- the rest of the world get the 15M and up while the spots are down.
-
-
- dit dit
-
-
- Chuck Adams K5FO CP-60 wpm
- adams@sgi.com
-
-
-
-
- From qrp-request@Think.COM Sun Jan 30 22:13:07 1994
- Return-Path: <adams@chuck.dallas.sgi.com>
- for qrp@think.com id AA27639; Sun, 30 Jan 94 19:13:02 -0800
- for @sgi.sgi.com:qrp@think.com id AA28480; Sun, 30 Jan 94 21:12:59 -0600
- for @sgidal.dallas.sgi.com:qrp@think.com id AA03417; Sun, 30 Jan 94 21:12:59 -0600
- Date: Sun, 30 Jan 94 21:12:59 -0600
- From: adams@chuck.dallas.sgi.com (Chuck Adams)
- Message-Id: <9401310312.AA03417@chuck.dallas.sgi.com>
- To: qrp@Think.COM
- Subject: Dayton
-
-
- Gang,
-
- Dayton is coming up pretty soon.
-
- This is first call for all the qrpers that are going to Dayton.
-
- email me the following information:
-
- name
- call
- days you'll be there
-
-
- First pass at a plan is to meet at the QRP ARCI hospitality suite
- on Saturday nite at 7pm or 8pm. Hopefully a cross-section of this
- group will be there and we can meet face-to-face.
-
- Be there and be square..... :-)
-
- dit dit
-
- Chuck Adams K5FO CP-60 wpm
- adams@sgi.com
-
-
-
-
- From qrp-request@Think.COM Mon Jan 31 07:40:33 1994
- Return-Path: <bapplega@isd.csc.com>
- Date: Mon, 31 Jan 94 07:46:32 EST
- From: bapplega@isd.csc.com (Bob Applegate)
- id AA10315 for qrp@think.com; Mon, 31 Jan 94 07:46:32 EST
- Message-Id: <9401311246.AA10315@isd.csc.com>
- To: qrp@Think.COM
- Subject: NN1G specs
-
- Can someone mail me the specs for the NN1G rig again? Someone was asking
- about them, but I didn't keep a copy around.
-
- Thanks,
- Bob, wa2zzx
-
- From qrp-request@Think.COM Mon Jan 31 09:20:30 1994
- Return-Path: <tjf@beta.lanl.gov>
- id HAA00518; Mon, 31 Jan 1994 07:19:24 -0700
- id AA13045; Mon, 31 Jan 94 07:21:25 -0700
- Date: Mon, 31 Jan 94 07:21:25 -0700
- From: tjf@beta.lanl.gov (Tom J Farish)
- Message-Id: <9401311421.AA13045@beta.lanl.gov>
- To: adams@chuck.dallas.sgi.com, qrp@Think.COM
- Subject: Re: Mobile CW
-
- Good suggestions, but you left off #5: Don't wait 'till the last
- minute to fill out those organ donor cards!
-
- Geez...I can't send decent CW and drink coffee at the same time
- without having an accident!
-
- Tom
- KJ5LT
-
-
- From qrp-request@Think.COM Mon Jan 31 09:51:30 1994
- Return-Path: <ccm!Mark_E_Gustoff@intelhf.intel.com>
- (Smail3.1.28.1 #2) id m0pQzy6-000MNYC; Mon, 31 Jan 94 06:51 PST
- (Smail3.1.28.1 #1) id m0pR00p-0000RRC; Mon, 31 Jan 94 06:54 PST
- Date: Mon, 31 Jan 94 06:54:02 PST
- From: Mark E Gustoff <Mark_E_Gustoff@ccm.hf.intel.com>
- Message-Id: <940131065402_1@ccm.hf.intel.com>
- To: qrp@Think.COM
- Subject: Re: Scout wanted
-
- ARRL is selling one, after having completed review on it a
- couple of months ago. Look in Feb QST for more details. They
- were taking bids starting around $430 I believe. Included
- around 5-8 band modules I believe.
-
- Good Luck..............
-
- de WO7T/QRP
-
-
- ================================================================
-
-
-
-
- HI gang,
- After my msg abt vacation in Dom Rep (HI) and perhaps Haiti(HH)
- I am getting a little despondant. It appears that I may not get a
- licence, from comments made. Oh well.... If I can I would like to
- take a Scout 515, they can be wound down to 4watts but also the
- 50 will be usefull on SSB. So,......
-
- Wanted loan or buy.... Scout 515 with lots of band modules.
- Guaranteed to return it if loaned. Many friends on here just ask
- for comments.
- 72 de Dick
- Dick G0BPS
-
- From qrp-request@Think.COM Mon Jan 31 11:22:21 1994
- Return-Path: <wb9omc@ecn.purdue.edu>
- id AA14170; Mon, 31 Jan 94 11:22:09 -0500
- Date: Mon, 31 Jan 94 11:22:09 -0500
- From: wb9omc@ecn.purdue.edu (Duane P Mantick)
- Message-Id: <9401311622.AA14170@harbor.ecn.purdue.edu>
- To: qrp@Think.COM
- Subject: reminder
-
-
- Here is a reminder that this coming weekend, Feb. 5th and 6th, is the
- 10-10 International Spring phone contest. While I realize that y'all
- tend to be devoted fans of CW, many *have* expressed an interest in
- SSB doing QRP.
-
- I have run my few measly watts during several of these contests and
- while not winning, have made some DX QSO's and picked up countries,
- counties, states, etc. for various award tallies.
-
- If any of you ARE 10-10 members, you doubtless are already aware
- of the specifics. For those who aren't, the contest runs from
- 0000 UTC Feb. 5th (which in my case is about 7 PM or something like
- that Friday evening) until 2400 UTC on Feb. 6th (which in my case is about
- 7 PM or so Sunday evening), or in short for 48 hours.
-
- Those of us who are 10-10ers count other members for 2 points and
- those without a 10-10 number are good for 1 point. That basically sums
- up the scoring - very simple.
-
- I should be running for much of the weekend and can be found somewhere
- between 28.3 and 28.5 MHz, screaming CQ's into the ether..... :-)
-
- BTW, I have had very good cooperation from the other contesters on
- running low power. Sometimes I give my phonetics as whiskey bravo
- nine one masochistic communicator, as a side effect of doing a
- contest in somewhat-QRPmode. :-)
-
- (I'd like to be able to get them to add another scoring category to
- this contest, something like stations under 25 watts or under 10 watts
- or whatever can sign " /QRP" and then count for 5 points for 10-10 members
- and perhaps 3 points for non-members. If enough QRP types get on
- the air and make themselves heard - bad pun that this is - there
- will be that much more leverage to do so.
-
- Even if the ONLY benefit of this ends up being that people will
- listen more closely for QRP stations, and pileups will take time out to
- ASK for QRP stations more often......then the effort would be worthwhile.)
-
- OK, now on the more selfish side of this (what, you thought my goals
- were purely philanthropic in nature? :-) ).....
-
- Any of y'all that are 10-10 members come run the contest. I just got my
- 400 bar, and I think it would be great if I could rack up 100 new ones
- during the contest and get my 500 bar and VP number. Really!
-
- Let's show 'em some QRP skill, eh?
-
- Duane
- WB9omc
-
- From qrp-request@Think.COM Mon Jan 31 12:47:01 1994
- Return-Path: <JMG@tntech.edu>
- <01H8BXRLHD00DU75RL@tntech.edu>; Mon, 31 Jan 1994 11:49:39 CST
- Date: Mon, 31 Jan 1994 11:49:39 -0600 (CST)
- From: "JEFF M. GOLD" <JMG@tntech.edu>
- Subject: Help: coil winding
- To: Qrp@Think.COM
- Message-Id: <01H8BXRLI5XUDU75RL@tntech.edu>
- X-Vms-To: IN%"Qrp@think.com"
- X-Vms-Cc: JMG
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
- Content-Transfer-Encoding: 7BIT
-
- HELP!!!
-
- will Ed, Chuck or one of you other experts please help. I am attempting
- to at least get all the parts on the board of the Radio Kits 20m. I have
- about everything except components that were not present and 5 coils.
-
- These five coils say at the end of the description things like 2 or 3
- turn link. I have never come across this before and can think of many
- meaning for this... anyone know exactly what is meant.. asked the local
- guy .. said ..depends on the circuit.
-
- Wrote off for the missing parts.. now can't find the MRF475.. anyone
- know if I can substitute a SC1969 (higher powered) in that circuit?
-
- Anyone want to finish this and play with it for a couple of months.. I
- have developed a real hate relationship with it.. haven't had this
- problem with a construction or repair since I had an old VW bus that I
- use to fight with all the time.
-
- thanks
-
- 72
-
- Jeff, AC4HF
-
- From qrp-request@Think.COM Mon Jan 31 15:56:07 1994
- Return-Path: <burdick@interval.com>
- Message-Id: <9401312055.AA25344@interval.interval.com>
- Date: Mon, 31 Jan 1994 12:54:27 -0800
- To: "William (W.D.) Redfearn" <cmwdr01@nt.com>
- From: burdick@interval.com (Wayne Burdick)
- Subject: Re: re:NorCal 40: The Second Batch
- Cc: dh@altair.csustan.edu, mvjf@mvubr.att.com, wayne@interval.com,
- ciavarin@mother.millipore.com, qrp@Think.COM
-
- Dave,
-
- Thanks for the question about our next NorCal club project, the Sierra
- multiband CW transceiver. The Sierra isn't quite ready for primetime (I'm
- building the prototype this week and have my fingers crossed), but here's a
- bit to chew on:
-
- - 150KHz coverage of 80/40/30/20/17/15 meters using plug-in modules
- - Similar to NorCal 40 design but with much better receiver
- performance, including plenty of speaker drive and IF amp w/good AGC range;
- receive-mode current drain around 30mA
- - size of main unit is 6.2W x 5.2D x 2.6H (roughly), with one main
- PCB (5.8W x 5D) with all controls and connectors mounted to it, and little
- wiring to do, like the NorCal 40
- - band modules are 4W x 1H and include 4 double-tuned circuits and
- 1 crystal (hope you don't mind toroids: there are eight (8) .375" OD
- toroids on each band module!)
- - Tx power out around 2.5W (nominal), a bit more on low bands and a
- bit less on high bands, and adjustable
- - quick-release latches on either side of the cabinet to get to the
- inside of the box for changing band modules
- - plenty of room inside the box for storage of band modules
- (velcro?), adding keyer, batteries, or antenna tuner, etc.
- - plenty of unused front panel space to add a meter, keyer speed
- control, etc.
- - estimated club kit prices: Sierra with one band module, $150;
- additional band modules around $20-30 each
-
- NOTE: Kits will be sold to NorCal members only--this is a non-profit, club
- project. Joining is $5 and can be concurrent with kit purchase, plus you
- get a great hand-crafted quarterly newsletter from Doug Hendricks.
-
- If you're intereseted, write to get on the Sierra mailing list:
-
- Jim Cates
- 3241 Eastwood Rd.
- Sacramento, CA 95821
-
- That's it for now; if the prototype works right away I'll be so happy that
- I'll probably post some *really* long-winded thing to the Internet next
- week (-:
-
- 73,
- Wayne
-
-
-
- From qrp-request@Think.COM Mon Jan 31 15:59:24 1994
- Return-Path: <ames@nebula.DECNET.LOCKHEED.COM>
- id AA16649; Mon, 31 Jan 1994 12:58:03 -0800
- Date: Mon, 31 Jan 1994 12:58:03 -0800
- Message-Id: <9401312058.AA16649@eagle.is.lmsc.lockheed.com>
- From: ames@nebula.DECNET.LOCKHEED.COM
- To: "QRP@think.com"@EAGLE.DECNET.LOCKHEED.COM
- Subject: SUBSCRIBE
-
- de N2ALE/6
-
- From qrp-request@Think.COM Mon Jan 31 16:26:33 1994
- Return-Path: <ccm!Mark_E_Gustoff@intelhf.intel.com>
- (Smail3.1.28.1 #2) id m0pR68Z-000MNbC; Mon, 31 Jan 94 13:26 PST
- (Smail3.1.28.1 #1) id m0pR6BK-00000bC; Mon, 31 Jan 94 13:29 PST
- Date: Mon, 31 Jan 94 13:29:17 PST
- From: Mark E Gustoff <Mark_E_Gustoff@ccm.hf.intel.com>
- Message-Id: <940131132917_5@ccm.hf.intel.com>
- To: qrp@Think.COM
- Subject: Zack Lau Triband QRP Transceiver
-
-
- Text item: Text_1
-
- Have built the 3 band VXO controlled QRP transceiver of Zack
- Lau's in the red QRP Handbook (by ARRL) or the Aug 89 QST (my
- guess at the date).
-
- Everything on receive side is working fine. The TX oscillator
- is working fine, but final RF amplification is no good. Have
- checked the toroidal transforms in this area three times
- (rewound both of them once already).
-
- I'm starting to suspect an error in the schematic or on
- RadioKit's parts layout diagram. If there are any builders
- of this rig that could help, please e-mail me your
- comments/suggestions.
-
- Tnx de WO7T/QRP
-
- ===================================================================
- Mark_E_Gustoff@ccm.hf.intel.com
- ===================================================================
-
- From qrp-request@Think.COM Mon Jan 31 20:51:46 1994
- Return-Path: <mvjf@mvubr.att.com>
- Message-Id: <9402010151.AA11313@Early-Bird.Think.COM>
- From: mvjf@mvubr.att.com
- Date: Mon, 31 Jan 94 20:43 EST
- Original-From: mvubr!mvjf (James M Fitton +1 508 960 2577)
- To: QRP@Think.COM
- Cc: mvgsd!mvaeh@Think.COM (Arthur E Haley), bwhite@dsd.camb.inmet.com,
- dh@deneb.csustan.edu, ed@auratek.com, ehare@arrl.org,
- esj@harvee.billerica.ma.us, evans@dkas.enet.dec.com,
- flem%hydra@polaroid.com, fmilos@east.sun.com, halbert@world.std.com,
- mvubr!mvjf@Think.COM (James M Fitton), kelsey@csn.org,
- kmg@kepler.unh.edu, kranz@hp-and.an.hp.com, lau@arrl.org,
- mvgpk!mvmed1@Think.COM (Michael E Dawson), randy7388@aol.com,
- rrand@pica.army.mil, smith@vicki.enet.dec.com, swart@curry.shr.dec.com,
- mvgpk!mvwkm@Think.COM (William K Mcnally), wayne@interval.com
- Subject: Forum FIY
-
-
-
-
- Mr. Ron Moorefield, W8ILC,
- Dayton Forum Manager
-
- Thank you for inviting us to speak again on QRP at Hamvention 1994.
- Based on the response from last year's forum it was decided
- to follow through and expand upon a theme introduced last year.
-
- Please confirm the following arrangements for our Forum.
-
- FORUM: "QRP - Those New Clubs"
- Date : 5/1/94 - Sunday
- Time : 0930-1100
- Room : 3
-
- Speakers and Titles:
- --------------------
- Jim Fitton, W1FMR "Coordinating"
- Chuck Adams, K5FO "Technical Interest"
- Doug Hendricks, KI6DS "Newsletters are Necessary"
-
- This year's forum focuses on 3 key ingredients that could
- help to start a successful QRP club in your own area.
- "The Excitement is Building" as Chuck, Doug, and Jim show
- how they tap into the information superhighway for ideas,
- creativity, and technology and generate excitement in their
- own QRP clubs.
-
- I hope this meets with your approval.
- Please let me know if there are any questions.
-
- W1FMR represents QRP-NE, The New England QRP Club.
- K5FO represents NT-QRP, The North Texas QRP Club.
- KI6DS represents NorCal-QRP, The Northern California QRP Club.
-
- 73, Jim Fitton, W1FMR
-
-
- From qrp-request@Think.COM Mon Jan 31 22:08:40 1994
- Return-Path: <ms@space.mit.edu>
- Message-Id: <9402010308.AA13824@Early-Bird.Think.COM>
- Date: Mon, 31 Jan 94 22:08:38 EST
- From: Mark Shelhamer <ms@space.mit.edu>
- To: QRP@Think.COM
- Subject: [QRP] Which books do you recommend?
-
-
- I'd like to branch out a bit and start building from scratch rather than kits.
- First, I'm going to augment my library, and I'm looking at some of the
- ARRL books. Does anyone have any opinions on these:
- QRP Notebook
- Design Notebook
- QRP Classics
- Solid State Design
-
- 73,
- Mark WA3YNO
-
-
- From qrp-request@Think.COM Tue Feb 1 00:45:14 1994
- Return-Path: <jherman@uhunix.uhcc.Hawaii.Edu>
- id AA02942; Mon, 31 Jan 94 19:45:08 HST
- id AA06692; Mon, 31 Jan 94 19:45:07 HST
- Date: Mon, 31 Jan 94 19:45:07 HST
- From: Jeff Herman <jherman@uhunix.uhcc.Hawaii.Edu>
- To: Mark Shelhamer <ms@space.mit.edu>
- Cc: QRP@Think.COM
- Subject: Re: [QRP] Which books do you recommend?
- In-Reply-To: Your message of Mon, 31 Jan 94 22:08:38 EST
- Message-Id: <CMM.0.90.2.760081507.jherman@uhunix3.uhcc.Hawaii.Edu>
-
- Mark - don't forget to get a copy of ``The History of QRP'' EXCELLENT
- READING! I believe the author's name is Weiss. I found a copy of it in
- our public library - couldn't stop reading it. I think the publisher
- is ``Milliwatt Books'' - they're the only one's who sell it, I believe.
-
-
-
- Jeffrey NH6IL jherman@hawaii.edu
-
- Vietnamese Proverb: If you study you will become what you wish
- If you do not study you will never become anything.
-
- From qrp-request@Think.COM Tue Feb 1 01:09:01 1994
- Return-Path: <jherman@uhunix.uhcc.Hawaii.Edu>
- id AA06679; Mon, 31 Jan 94 20:08:51 HST
- id AA07529; Mon, 31 Jan 94 20:08:51 HST
- Date: Mon, 31 Jan 94 20:08:51 HST
- From: Jeff Herman <jherman@uhunix.uhcc.Hawaii.Edu>
- To: QRP@Think.COM
- Subject: Books
- Message-Id: <CMM.0.90.2.760082931.jherman@uhunix3.uhcc.Hawaii.Edu>
-
- Gang,
- Here's the complete info on how to get a copy of this wonderful book,
- HISTORY OF QRP IN THE U.S.:
-
- A. Weiss W0RSP
- Milliwatt Books
- 833 Duke St. #83
- Vermillion, South Dakota 57069
-
- $12 - it'll come first class mail.
-
- Do I recall that the ARRL also sells this?
-
-
-
- Jeffrey NH6IL jherman@hawaii.edu
-
- Vietnamese Proverb: If you study you will become what you wish
- If you do not study you will never become anything.
-
- From qrp-request@Think.COM Tue Feb 1 01:22:05 1994
- Return-Path: <jerry@tr2.com>
- (5.65c/IDA-1.4.4); Mon, 31 Jan 1994 21:54:41 -0800
- id m0pR6Ha-000040C; Mon, 31 Jan 94 21:35 GMT
- Message-Id: <m0pR6Ha-000040C@tr2.COM>
- From: jerry@tr2.com
- Subject: Re: Help: coil winding
- To: JMG@tntech.edu (JEFF M. GOLD)
- Date: Mon, 31 Jan 1994 21:35:46 +0000 (GMT)
- Cc: qrp@Think.COM
- In-Reply-To: <01H8BXRLI5XUDU75RL@tntech.edu> from "JEFF M. GOLD" at Jan 31, 94 11:49:39 am
- X-Mailer: ELM [version 2.4 PL21]
- Mime-Version: 1.0
- Content-Type: text/plain; charset=US-ASCII
- Content-Transfer-Encoding: 7bit
- Content-Length: 2248
-
- Jeff, AC4HF writes:
- >
- > HELP!!!
- >
- > will Ed, Chuck or one of you other experts please help. I am attempting
- > to at least get all the parts on the board of the Radio Kits 20m. I have
- > about everything except components that were not present and 5 coils.
- >
- > These five coils say at the end of the description things like 2 or 3
- > turn link.
-
- **** That's a separate little winding, two or three turns around the
- toroid, that is used to transfer power in and out of it without loading
- down the Q of the tuned circuit. As a rule, a link is wound around the
- ``cold'' end of the tuned circuit ( ground or power ); this minimizes
- capacitive coupling.
-
- It can be interesting and instructive to take a signal generator
- and a scope, and use them to play with a parallel tuned circuit. You
- put the tuned circuit across the output of the generator, and measure
- the voltage across it with the scope. Sweep the generator... Hmm, not
- too selective... Now wind a link around the toroid, and connect the
- signal generator to the link. Sweep again... Wow!! Look at that peak!
-
- You can get a good peak even without the link by putting a big
- resistor in series with the output of the generator. Say, 100K. That
- effectively removes the generator's low output impedance from across the
- tuned circuit, letting it approach its unloaded Q. You could also think
- of the series resistor as giving the tuned circuit something to work
- against when it tries to short out the output.
-
- The disadvantage of the big resistor is that you're not transferring
- much power through the tuned circuit. That's where links come in. They
- let you freely choose what the load on the tuned circuit is, therefore
- what its loaded Q is, therefore what its bandwidth is.
-
- You can get pretty much the same effect as a link by just tapping down
- on the main coil. But when you use toroids, links are easier. They
- also give you the added benefit of DC isolation.
-
- - Jerry
- --
- ***************************************************************
- * Jerry Kaidor jerry@tr2.com, jkaidor@synoptics.com *
- * KF6VB *
- ***************************************************************
-
- From qrp-request@Think.COM Tue Feb 1 09:06:46 1994
- Return-Path: <JMG@tntech.edu>
- <01H8D4FTOSDIDU7IUE@tntech.edu>; Tue, 1 Feb 1994 08:09:27 CST
- Date: Tue, 01 Feb 1994 08:09:26 -0600 (CST)
- From: "JEFF M. GOLD" <JMG@tntech.edu>
- Subject: coil winding
- To: qrp@Think.COM
- Message-Id: <01H8D4FTOSDKDU7IUE@tntech.edu>
- X-Vms-To: IN%"qrp@think.com"
- X-Vms-Cc: JMG
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
- Content-Transfer-Encoding: 7BIT
-
- All,
-
- I checked the instruction sheet on the Radio Kits 20m.. here is what it
- says and I will tell you why I am somewhat confused:
-
- L1-20T #28 on T30-2, tap at 7 t from ground,-2t link at fround end
-
- *note doesn't say biflar
-
- L3/L4-12t biflar #20 on t30-2-2t link.
-
- Now does that mean on the L3/L4 you wind 12 turns of double wire and
- then add another 3rd wired for the 2t link? or is L1 really biflar.
-
- thanks
-
- Jeff, AC4HF
-
- From qrp-request@Think.COM Tue Feb 1 10:24:30 1994
- Return-Path: <randolph@est.enet.dec.com>
- id AA09605; Tue, 1 Feb 94 07:24:27 -0800
- Message-Id: <9402011524.AA09605@enet-gw.pa.dec.com>
- Date: Tue, 1 Feb 94 07:24:27 PST
- From: N1OOQ Tom R. @ MRO1 01-Feb-1994 1011 <randolph@est.enet.dec.com>
- To: qrp@Think.COM
- Apparently-To: qrp@think.com
- Subject: re: [QRP] Which books do you recommend?
-
- Mark,
- I just got Solid State Design and W1FB QRP Notebook for my birthday 8-)...
- Of the two, SSD is probably better if you want to design your own circuits.
- It goes into pretty good detail on things like xsistor theory, oscillators,
- VXOs, VFOs, etc. (yup, I haven't gotten to the RX part yet). QRP Notebook is
- better if you want a good selection of designed and tested HF QRP circuits
- to choose from. SSD also covers up into VHF/UHF. Both excellent books, and
- pretty well up to date... most of the parts in the designs are readily
- available from the major distributors, with some specialized stuff that you
- have to go to Amidon, RF Parts, etc. for. Flea market season starts up again
- very soon here in the Northeast, so I'm looking forward picking up some needed
- parts. Anyone wanna see my QRP Notebook shopping list?
- -Tom R. N1OOQ randolph@est.enet.dec.com
-
- From qrp-request@Think.COM Tue Feb 1 11:52:18 1994
- Return-Path: <laurahal@microsoft.com>
- id AA29986; Tue, 1 Feb 94 08:53:02 -0800
- Message-Id: <9402011650.AA10330@itgmsm>
- From: laurahal@microsoft.com
- To: ms@space.mit.edu, QRP@Think.COM
- Subject: RE: [QRP] Which books do you recommend?
- Date: Tue, 01 Feb 94 08:50:00 PST
- X-Mailer: Microsoft Mail V3.0
-
-
- Mark Shelhamer asks for opinions on:
-
- > QRP Notebook
- > Design Notebook
- > QRP Classics
- > Solid State Design
-
- They're all good. Buy them all.
-
- If I was to do it again I'd buy W1FB's books first, then _QRP Classics_,
- then _Solid State Design_ - going from the least nerdy to the most nerdy,
- more-or-less.
-
- After that I'd start looking for goodies like those cool Motorola RF devices
- books, and some good books on RF transistor design and the like. One of my
- standard recommendations is the RSGB's _Radio Communication Handbook_, which
- covers much of the same ground as the ARRL Handbook, but from a very
- different approach. Yes, it is a little dated by now and some of the British
- parts can be hard to find in North America, but it's still a good buy, IMHO.
-
- One book I'd like to see might be entitled _The ham radio Compendium_. That
- was one way cool magazine and people who have old issues are rarely
- interested in parting with them...
-
- 73 from Burnaby,
- laura VE7LDH
-
- From qrp-request@Think.COM Tue Feb 1 14:47:44 1994
- Return-Path: <auratek!auratek.com!epacyna@uunet.UU.NET>
- (5.61/UUNET-internet-primary) id AAwbkh23382; Tue, 1 Feb 94 14:47:33 -0500
- (queueing-rmail) id 144641.25156; Tue, 1 Feb 1994 14:46:41 EST
- id AA24705; Tue, 1 Feb 94 11:56:05 EST
- Date: Tue, 1 Feb 94 11:56:05 EST
- From: epacyna@auratek.com (Edward Pacyna)
- Message-Id: <9402011656.AA24705@auratek.com>
- To: qrp@Think.COM, uunet!tntech.edu!JMG@uunet.UU.NET
- Subject: Re: coil winding
-
- >
- >All,
- >
- >I checked the instruction sheet on the Radio Kits 20m.. here is what it
- >says and I will tell you why I am somewhat confused:
- >
- >L1-20T #28 on T30-2, tap at 7 t from ground,-2t link at fround end
- >
- >*note doesn't say biflar
-
- L1 forms the tuned circuit between the antenna and RX mixer. This is to
- provide some selectivity in front of the mixer (eliminate out of band
- signals that can produce IMD and the mixer image response from being
- heard while you tune the frequencies of interest), and provide maximum
- power transfer by matching the antenna to the mixer. Maximum power is
- transferred when the source Z is equal to the load Z.
-
- The 2 turn secondary link steps up both the low antenna Z and voltage
- through transformer action. The basic formulas are in every basic book
- on electronics. In your case the 50 ohm antenna is stepped up to 9,800
- ohms across the primary ( (28/2)^2 X 50 ) and the voltage is increased
- to 14 times the antenna voltage at 50 ohms. The 7 turn tap also provides
- a transformer between primary of L1 and the mixer. The Z transformation
- is (28/7)^2 or 16:1. Since the single ended NE602 mixer input is 1500
- ohms, it will now appear across L1 as 24,000 ohms (1500 X 16). Note that
- the antenna is NOT matched to the load and you will have some uneccessary
- losses. You can change the # of turns in either the link or tap point to
- correct this (e.g. you want both of the transformed Z's to be equal for
- minimum loss).
-
- There is also another consideration, the selectivity. The Q of this circuit
- is basically (w L) / R. Where w = 2 pie f and R is the total loading on the
- parallel tuned circuit. There are actually 3 R's involved. In addition to
- the two mentioned above, the components themselves have loss (mainly the
- inductor and the loss is express as an resistance where R = Qu w L, Qu is
- the unloaded Q of the inductor. A typical value for the toroid above at
- 14Mhz would be 150. So the tuned circuit sees; R antenna of 9,800 ohms,
- R mixer of 24,000 ohms and R component of about 32,000 ohms. The 3 in
- parallel combine to 2,860 ohms. The tuned circuit Q is about 13 which is
- a 3dB bandwith of a little over 1Mhz ( BW = F / Q). Given that this is
- a single tuned circuit (not to much attenuation in stop band), the image
- may be heard. The QRP20 (with a 4MHz VFO and 10Mhz IF) will probably hear
- 6Mhz images at night.
-
- So adjust either the link or tap point and build the circuit. The only
- tickey point is to wind the primary and secondary windings in the same
- sense (that means same direction and cold and hot ends start and stop
- at the same end). Also, links are usually wound over the cold end (e.g.
- ground end) in narrow band tuned circuits and over the center in wide
- band or center tapped circuits.
-
-
-
- >L3/L4-12t biflar #20 on t30-2-2t link.
- >
- >Now does that mean on the L3/L4 you wind 12 turns of double wire and
- >then add another 3rd wired for the 2t link? or is L1 really biflar.
- >
-
- Very similar to above discussion. I recall that this circuit is used
- between the mixer output and crystal filter. The curve here is that
- they are using a bifilar winding connected together to make a single
- primary winding with center tap. The tricky part here is to connect the
- bifilar winding correctly. Think of it this way. Use two equal lengths
- wires (one red and one green) and twist them together in a hand drill.
- Wind the combined wires the correct # of turns (remember every time you
- pass through the inside of the toroid it is 1 turn). Connect the red wire
- from one end to the green wire at the other end to make the center tap.
- The link should be added as above. Since the center tap is formed via
- a bifilar winding you just wind the link over the primary.
-
-
- 73
-
- Ed W1AAZ
-
-
- From qrp-request@Think.COM Tue Feb 1 15:32:42 1994
- Return-Path: <JMG@tntech.edu>
- <01H8DHOOQH8GDU7CXM@tntech.edu>; Tue, 1 Feb 1994 14:34:30 CST
- Date: Tue, 01 Feb 1994 14:34:30 -0600 (CST)
- From: "JEFF M. GOLD" <JMG@tntech.edu>
- Subject: Argosy
- To: qrp@Think.COM
- Message-Id: <01H8DHOOR0IQDU7CXM@tntech.edu>
- X-Vms-To: IN%"qrp@think.com"
- X-Vms-Cc: JMG
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
- Content-Transfer-Encoding: 7BIT
-
- Well thanks to Kevin Anderson and a number of people on this
- list I do believe I have finally found an Argosy II.
-
- I have been trying to collect some old Ten Tec gear. I have recently got
- hold of a Century 21 (just replaced the finals last night... seems to be
- working good) and will be receive a Century 22 any day now. I already
- have an Argonaut 509 that I use mobile.
-
- I had been checking the Swap and equipment groups religously, but missed
- the .misc group lately.. and of course that is where one finally showed
- up.. think I got the first call in.. gave full price with a smile..
- suppose to be in mint condition.
-
- Sure would like to find some of the really old stuff.. (didn't they have
- seperate TX/REC..think I saw some while I was at the factory).
-
- I have a chance to pick up a Scout.. but think I would rather hold off
- and check out the QRP Plus
-
- Time to build more desk space.. I leave all my rigs operational.
-
- PS.. if any of you are straight key or paddle collectors (my other vise)
- I have a really different single paddle ( I normally use the dual
- paddles) really high speed paddle on the way in.. I ordered extra info
- sheets incase anyone was interested (Chuck will get one automatically).
- Saw it a few times at ham fests.. and tried it out each time. the new
- one has a really nice wood finger piece.. so different in design, I
- can't explain it. I can almost be understood with a Vibroplex Bug at
- this point.. one of my challenges.
-
- 72
-
- Jeff, AC4HF
-
- From qrp-request@Think.COM Wed Feb 2 00:33:36 1994
- Return-Path: <adams@chuck.dallas.sgi.com>
- for qrp@think.com id AA25286; Tue, 1 Feb 94 21:33:31 -0800
- for @sgi.sgi.com:qrp@think.com id AA11204; Tue, 1 Feb 94 23:33:28 -0600
- for @sgidal.dallas.sgi.com:qrp@think.com id AA14670; Tue, 1 Feb 94 23:33:28 -0600
- Date: Tue, 1 Feb 94 23:33:28 -0600
- From: adams@chuck.dallas.sgi.com (Chuck Adams)
- Message-Id: <9402020533.AA14670@chuck.dallas.sgi.com>
- To: qrp@Think.COM
- Subject: Hambrew
- Cc: exit@chuck.dallas.sgi.com
-
-
- Gang,
-
- i haven't heard a word, have you?
-
- Hambrew Magazine
- P.O. Box 260083
- Lakewood, CO 80226-0083
- 1-800-5-HAM RIG for Ads and Subscriptions
-
- guess it's time to call and find out what's going on.
-
- i did hear indirectly that George (owner, editor, publisher) wants
- yours truly to write an article, but i think i'll pass.
-
- also of remarkable note: a miracle has happened. i got the sun
- spot data for everymonth since 1749, when they were first taken.
- stand by, this data will appear in an article in QQ, next issue.
- graphs and all for correlation between QRP activity and the sunspot
- activity.
-
-
- ok, back to work.
-
- dit dit
- Chuck Adams K5FO CP-60 wpm
- adams@sgi.com
-
-
-
-
- From qrp-request@Think.COM Wed Feb 2 01:42:34 1994
- Return-Path: <usr1163a@tso.uc.EDU>
- <01H8E57FALGG921IN9@UCBEH.SAN.UC.EDU>; Wed, 2 Feb 1994 01:40:03 EST
- Date: Wed, 02 Feb 1994 00:44:23 -0500 (EST)
- From: usr1163a@tso.uc.EDU (Edwin E. Albert)
- Subject: Subscribe
- To: qrp@Think.COM
- Message-Id: <9402020544.AA29907@tso.uc.edu>
- Content-Transfer-Encoding: 7BIT
-
- Subscribe Edwin E. Albert KF8EE
-
- From qrp-request@Think.COM Wed Feb 2 08:53:25 1994
- Return-Path: <sunsrvr6!sunsrvr2.cci.com!jdc@uu3.psi.com>
- id AA26347 for ; Wed, 2 Feb 94 08:43:38 -0500
- id AA01683; Wed, 2 Feb 94 08:33:21 EST
- id AA26672; Wed, 2 Feb 94 08:33:20 EST
- Date: Wed, 2 Feb 94 08:33:20 EST
- From: jdc@sunsrvr2.cci.com (James D. Cronin)
- Message-Id: <9402021333.AA26672@sunsrvr2.cci.com>
- To: qrp@Think.COM
- Subject: Hambrew magazine
-
-
- According to George, the Post Office is to blame. He sends
- copies of the magazine out. They never arrive.
-
- 73...Jim
- N2VNO
-
-
- From qrp-request@Think.COM Wed Feb 2 09:41:04 1994
- Return-Path: <JMG@tntech.edu>
- <01H8EJMF0E0GDU7V2C@tntech.edu>; Wed, 2 Feb 1994 08:43:27 CST
- Date: Wed, 02 Feb 1994 08:43:27 -0600 (CST)
- From: "JEFF M. GOLD" <JMG@tntech.edu>
- Subject: New Toy
- To: qrp@Think.COM
- Message-Id: <01H8EJMF1Q8IDU7V2C@tntech.edu>
- X-Vms-To: IN%"qrp@think.com"
- X-Vms-Cc: JMG
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
- Content-Transfer-Encoding: 7BIT
-
- All,
-
- got in a new toy last night. It is a very unusual single paddle key that
- I saw at a few ham fests, played with and liked.
-
- It is called the VSL X3. is has solid gold contacts frabricated form W.
- E. Alloy #1, 69% gold, 25% silver, 6% platinum.
-
- the contact base is 1/2" thick, clear Lexan. The spacing assembly is
- very precise form 1/2 oz go 2.5 oz
-
- 2.2 lb of steel weights directly over key feet for stability.
-
- or 3 X 3.5" horizontal
-
- solid brass posts, contact screws and lever bar (except for "feel
- adjustment which I think are nylon)
-
- capable of speeds over 50 wpm (so claimed.. think Chuck will have to
- test that concept out)
-
- Hardwood finger piece of polished Cocobolo (really nice and feels great)
-
- phono jack output for easy changing of keying polarity
-
- Optional clear dust cover (waste of money.. not real pleased with this
- miniature piece of nothing.. only usable if you use key in horizontal
- position)
-
- 1-800-726-8936
-
- I have nothing to do with this company (as usual) except for a recent
- contribution of funds that was applied toward the key I received
- ================================================================
-
-
- OK, now my comments.. I collect and love keys and paddles.. only special
- ones.. sold my Benchers right off when I saw better paddles..I usually
- use dual iambic paddles (love my Kents). So with this in mind.. had to
- be pretty different and good for me to spend the bucks. The key can be
- used in one of two vertical positions.. the difference being the "feel"
- of the key. It can also be used in the vertical position for what he
- says is a "bug" like feel. I have played with both vertical positions
- and preferred the one it was designed to do.. but if time permitts
- tonite I am going to try the horizontal position (with the key that is).
-
- I prefer a very sensitive touch with straight keys and paddles. I found
- that you can really get a great feel setting with this key. I found it
- very easy to send properly using this single paddle key and could send
- just as fast without using the keyer's Iambic feature.
-
- He will send you a nice brochure if you call.
-
- 72
-
- Jeff, AC4HF
-
- *go ahead Doug .. its all yours
-
- From qrp-request@Think.COM Wed Feb 2 10:30:52 1994
- Return-Path: <JMG@tntech.edu>
- <01H8ELA7IMU8DU7UNW@tntech.edu>; Wed, 2 Feb 1994 09:33:25 CST
- Date: Wed, 02 Feb 1994 09:33:25 -0600 (CST)
- From: "JEFF M. GOLD" <JMG@tntech.edu>
- Subject: Centruy 21..transistors
- To: qrp@Think.COM
- Message-Id: <01H8ELA7JPF6DU7UNW@tntech.edu>
- X-Vms-To: IN%"qrp@think.com"
- X-Vms-Cc: JMG
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
- Content-Transfer-Encoding: 7BIT
-
- Hi,
-
- Recently purchased a Century 21 off the net for my future Ten Tec
- collection.
-
- * anyone know anything about "power mites"?
-
- I had to replace one of the finals.. RF parts had the MRF475 for 9.95. I
- cross referenced it to a 2SC1969..same as used in the Gary Breeds. The
- 2sc1969s were $2.65.. so bought 5 or them.. figured could always use
- them if I blew one in my GB. Well I had heard that the 21s put out 50
- watts. I am looking at the spec.. says.."Final RF pwr Output.. 13W"
-
- They were cheap enought so i replaced both.. figured more likely to be
- closer matched. (matched sets of MRF475s were like $25.
-
- I really liked the module design of the Century 21.. while I was in the
- radio.. replaced some wires that didn't look great.... it was fun.
- Wasn't real hard to replace the transistors. I think that someone hadn't
- set the current limiter correctly and that is why the transistor blew.
- Haven't really looked at it.. but the manual says the finals are suppose
- to be protected.
-
- The manual also said 25-30 watts. Well couldn't find anything in the
- book to help me set the two thumb wheel Pots? one I know sets the meter
- adjust ... the other..current limiter? Played around with them till it
- seemed about right.. (not really good way.. but works sometimes).
- Adjusted the power input by checking my Watt meter and noticing at which
- point the radio was near full power.. coincided with about the right
- power input level.. so left it alone. The rig seems to loaf at 35-40
- watts on 20 meters.
-
- I got on 80 meters and tuned my 10-12-15-17-20 meter quad for 80
- meters.. pointed north (the rotor is frozen with our very cold wx) and
- of course heard a station calling CQ from Guatemala. Now I lost a few
- other people calling CQ.. not use to the DC receiver.. think they are
- calling at one freq., I am answering at another.. played with my 850S
- and adjusted the RIT on the 21 till I seemed to figure out where I
- needed to be. Answered the CQ and the guy came right back to me... got a
- good report also. The wattmeter was peaking at about 50 watts and
- running average over 40.
-
- Those $2.65 2SC1969s seem to be enjoying themselves and I didn't have
- the power input up to the suggested level.. going to start going down to
- QRP now that I know the rig works.
-
- 72
-
- Jeff, AC4HF
-
- From qrp-request@Think.COM Wed Feb 2 12:06:06 1994
- Return-Path: <ccm!Mark_E_Gustoff@intelhf.intel.com>
- (Smail3.1.28.1 #2) id m0pRl1R-000MOqC; Wed, 2 Feb 94 09:05 PST
- (Smail3.1.28.1 #1) id m0pRl3p-0001M8C; Wed, 2 Feb 94 09:08 PST
- Date: Wed, 2 Feb 94 09:08:17 PST
- From: Mark E Gustoff <Mark_E_Gustoff@ccm.hf.intel.com>
- Message-Id: <940202090817_8@ccm.hf.intel.com>
- To: qrp@Think.COM
- Subject: Re: Centruy 21..transistors
-
- Jeff:
-
- My Century 21 has 75W input, and it is good for between 25-35W
- out on most bands. I could do a band by band check tonight, and
- give you more accurate power out measurements.
-
- 72
-
- Mark_E_Gustoff@ccm.hf.intel.com
-
-
-
- Hi,
-
- Recently purchased a Century 21 off the net for my future Ten Tec
- collection.
-
- * anyone know anything about "power mites"?
-
- I had to replace one of the finals.. RF parts had the MRF475 for 9.95. I
- cross referenced it to a 2SC1969..same as used in the Gary Breeds. The
- 2sc1969s were $2.65.. so bought 5 or them.. figured could always use
- them if I blew one in my GB. Well I had heard that the 21s put out 50
- watts. I am looking at the spec.. says.."Final RF pwr Output.. 13W"
-
- They were cheap enought so i replaced both.. figured more likely to be
- closer matched. (matched sets of MRF475s were like $25.
-
- I really liked the module design of the Century 21.. while I was in the
- radio.. replaced some wires that didn't look great.... it was fun.
- Wasn't real hard to replace the transistors. I think that someone hadn't
- set the current limiter correctly and that is why the transistor blew.
- Haven't really looked at it.. but the manual says the finals are suppose
- to be protected.
-
- The manual also said 25-30 watts. Well couldn't find anything in the
- book to help me set the two thumb wheel Pots? one I know sets the meter
- adjust ... the other..current limiter? Played around with them till it
- seemed about right.. (not really good way.. but works sometimes).
- Adjusted the power input by checking my Watt meter and noticing at which
- point the radio was near full power.. coincided with about the right
- power input level.. so left it alone. The rig seems to loaf at 35-40
- watts on 20 meters.
-
- I got on 80 meters and tuned my 10-12-15-17-20 meter quad for 80
- meters.. pointed north (the rotor is frozen with our very cold wx) and
- of course heard a station calling CQ from Guatemala. Now I lost a few
- other people calling CQ.. not use to the DC receiver.. think they are
- calling at one freq., I am answering at another.. played with my 850S
- and adjusted the RIT on the 21 till I seemed to figure out where I
- needed to be. Answered the CQ and the guy came right back to me... got a
- good report also. The wattmeter was peaking at about 50 watts and
- running average over 40.
-
- Those $2.65 2SC1969s seem to be enjoying themselves and I didn't have
- the power input up to the suggested level.. going to start going down to
- QRP now that I know the rig works.
-
- 72
-
- Jeff, AC4HF
-
- From qrp-request@Think.COM Wed Feb 2 12:55:45 1994
- Return-Path: <JMG@tntech.edu>
- <01H8EQRFL6AODU7RYC@tntech.edu>; Wed, 2 Feb 1994 11:58:10 CST
- Date: Wed, 02 Feb 1994 11:58:10 -0600 (CST)
- From: "JEFF M. GOLD" <JMG@tntech.edu>
- Subject: Power Mites
- To: qrp@Think.COM
- Message-Id: <01H8EQRFLZ8IDU7RYC@tntech.edu>
- X-Vms-To: IN%"qrp@think.com"
- X-Vms-Cc: JMG
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
- Content-Transfer-Encoding: 7BIT
-
- All,
-
- My next quest is to find a Ten Tec Power Mite. I was told there was a
- SB3? 20/40.. I want one. Anyone know anyone who knows anyone who might
- know of someone he might sell one?
-
- 72
-
- Jeff, AC4HF
-
- From qrp-request@Think.COM Wed Feb 2 12:57:29 1994
- Return-Path: <ames@nebula.DECNET.LOCKHEED.COM>
- id AA02631; Wed, 2 Feb 1994 09:47:12 -0800
- Date: Wed, 2 Feb 1994 09:47:11 -0800
- Message-Id: <9402021747.AA02631@eagle.is.lmsc.lockheed.com>
- From: ames@nebula.DECNET.LOCKHEED.COM
- To: "qrp@Think.COM"@EAGLE.DECNET.LOCKHEED.COM
- Subject: QRP rig
-
- I'm just getting into QRP and sent off for membership in QPR ARCI.
- I have a TS-830S but have a Yaesu Ft-7 lined up just for QPR, my interest
- is contesting so lack of 30m is not an issue (today).
-
- Any thoughts about this rig? Have I "scored big" or "messed up"?
- PSE reply direct especially for the latter.
-
- 73, alan N2ALE/6
- ames@force.decnet.lockheed.com
-
- From qrp-request@Think.COM Wed Feb 2 14:49:36 1994
- Return-Path: <jherman@uhunix.uhcc.Hawaii.Edu>
- id AA23709; Wed, 2 Feb 94 09:49:27 HST
- id AA22505; Wed, 2 Feb 94 09:48:05 HST
- Date: Wed, 2 Feb 94 9:48:04 HST
- From: Jeff Herman <jherman@uhunix.uhcc.Hawaii.Edu>
- To: QRP@Think.COM
- Subject: qrp talk on r.r.a.misc
- Message-Id: <CMM.0.90.2.760218484.jherman@uhunix3.uhcc.Hawaii.Edu>
-
- Gang,
- There's a QRP thread that has started on rec.radio.amateur.misc -
- finally saw someone from here (Chuck!) contribute to it. This is a good
- chance to tell the world about our first love (r.r.a.misc has an estimated
- readership of 50,000). Let's get some more of you in this thread!
-
-
- Jeffrey NH6IL jherman@hawaii.edu
-
- Vietnamese Proverb: If you study you will become what you wish
- If you do not study you will never become anything.
-
- From qrp-request@Think.COM Wed Feb 2 16:32:48 1994
- Return-Path: <kub@upl.com>
- id AA16930; Wed, 2 Feb 94 14:32:40 MST
- Date: Wed, 2 Feb 94 14:32:40 MST
- From: kub@upl.com (Steve Kubisch)
- Message-Id: <9402022132.AA16930@uplherc.upl.com>
- To: qrp@Think.COM
- Subject: wire antennas for qrp
-
-
- Hi,
- I'm new to internet and new to this group. Have enjoyed reading
- the mail from here and have picked up some new ideas. I have a
- Tejas Backpacker II on 30 meters and am expecting a Norcal40 from
- the new batch of 100. I would like some of your opinions on gud
- wire antennas for my qrp rigs both perminent and portable as I
- take the little pups backpacking and camping here in Utah....
- sooo... what are you guys using???
-
- Thanks,
-
- Steve Kubisch WW7Y kub@upl.com
-
- From qrp-request@Think.COM Wed Feb 2 18:10:52 1994
- Return-Path: <turner@safety.ICS.UCI.EDU>
- 2 Feb 94 15:10 PST
- To: "JEFF M. GOLD" <JMG@tntech.edu>
- Cc: qrp@Think.COM
- Subject: Re: Power Mites
- In-Reply-To: Your message of "Wed, 02 Feb 1994 11:58:10 CST."
- <01H8EQRFLZ8IDU7RYC@tntech.edu>
- Date: Wed, 02 Feb 1994 15:10:40 -0800
- From: Clark Savage Turner WA3JPG <turner@safety.ICS.UCI.EDU>
- Message-Id: <9402021510.aa14625@paris.ics.uci.edu>
-
- Hi Jeff:
-
- I had my first Ten Tec rig in about 1970 or so, it was the Ten Tec
- Power Mite PM3A. It was a 40 and 20 meter CW rig, DC receiver
- with small tuning meter, several tune up controls, very little
- audio (headphones only) with exposed needle for analog tuning
- purposes. Ran some 4 watts out or so from a 12 volt lantern
- battery. Not selective, but plenty sensitive. I liked it so much
- I saved up for an Argonaut 505 in 1972.
-
- They are boxes about the size of your 509, but are white. I knew of
- the PM 1, the PM 2, and the PM 3.
-
- I'll keep my eye open for you. Good luck.
-
- 72
-
- Clark
- WA3JPG
-
- From qrp-request@Think.COM Wed Feb 2 18:26:26 1994
- Return-Path: <turner@safety.ICS.UCI.EDU>
- 2 Feb 94 15:26 PST
- To: Steve Kubisch <kub@upl.com>
- Cc: qrp@Think.COM
- Subject: Re: wire antennas for qrp
- In-Reply-To: Your message of "Wed, 02 Feb 1994 14:32:40 MST."
- <9402022132.AA16930@uplherc.upl.com>
- Date: Wed, 02 Feb 1994 15:26:19 -0800
- From: Clark Savage Turner WA3JPG <turner@safety.ICS.UCI.EDU>
- Message-Id: <9402021526.aa15413@paris.ics.uci.edu>
-
- Hello Steve:
-
- A very open ended question, and I believe the short answer is that
- just about anything full length and at reasonable height will work
- fine. I have always used a 100 foot dipole as a standard first
- antenna at a new QTH. I feed it with 300 ohm TV twin lead to a tuner,
- and it is usually about 30 feet up. I run 5 watts and under and
- work plenty of DX, mostly on 40. I have also put up an extended
- double zepp for 40 meters, about 150 foot dipole, also fed with
- 300 ohm twin lead, and it gives me a better signal broadside to
- the wire by a few db, noticeable on my receiver when I switch
- antennas (I have them oriented the opposite way).
-
- SO, heck, I have always had lots of success with a 50 foot wire
- thrown up into a tree fed at the end to a tuner for 40-10, and
- it will work up on 75, though not so well. I have end fed
- horizontal wires just fine also. You need only have lots of wire,
- a decent antenna tuner, some supports and lots of imagination.
- Hey, try a loop if you have the space. Just put out as much
- wire as you can, as high as you can, and get on the air.
-
- 72
-
- Clark
- WA3JPG
-
- From qrp-request@Think.COM Wed Feb 2 22:45:31 1994
- Return-Path: <mvjf@mvubr.att.com>
- Message-Id: <9402030345.AA01312@Early-Bird.Think.COM>
- From: mvjf@mvubr.att.com
- Date: Wed, 2 Feb 94 22:36 EST
- Original-From: mvubr!mvjf (James M Fitton +1 508 960 2577)
- To: QRP@Think.COM
- Subject: ARCI QQ
-
-
- The ARCI QRP Quarterly (QQ) should be in the mail by Friday....
- There is a hole on one page where the printer lost a photo....
- For the sake of expediency, since the editor is in IL and
- printer in TX, it was decided not to hold the presses
- but to run without it......
-
- 72/73.... W1FMR
-
- From qrp-request@Think.COM Thu Feb 3 00:57:45 1994
- Return-Path: <mont@netcom.com>
- id VAA24965; Wed, 2 Feb 1994 21:56:48 -0800
- From: mont@netcom.com (Mont Pierce)
- Message-Id: <199402030556.VAA24965@mail.netcom.com>
- Subject: Re: Articles in QST
- To: tardis@atd.mke.ab.com (Bob Citkowski)
- Date: Wed, 2 Feb 1994 21:56:45 -0800 (PST)
- Cc: QRP@Think.COM, jkearman@arrl.org
- In-Reply-To: <9401191518.AA07197@hammer.atd.mke.ab.com> from "Bob Citkowski" at Jan 19, 94 09:18:30 am
- X-Mailer: ELM [version 2.4 PL23]
- Mime-Version: 1.0
- Content-Type: text/plain; charset=US-ASCII
- Content-Transfer-Encoding: 7bit
- Content-Length: 3114
-
- >
- > hi,
- > continuing on this drawn out thread..... the february 73 magazine has an "article", not
- > a review of a kit, on an ascii to cw project. provides the schematic, parts list,
- > long article on what's going on, but, no listing of the code for the eprom program that
- > the micro uses. in the parts list the "kit" provider for $27 will sell you the micro
- > and eeprom with the required code burned along with the source code and software tools
- > to program/modify the code yourself, of course one needs to have a eprom eraser/programmer
- > available to do this. this seems to be a recurring "problem"(?) with the projects that
- > are being published according to the thread on this list. but, from the average ham i
- >.....
-
- Well, actually this ham has provided all parts needed for any builder at
- whatever level. You can get the burned prom, along with the source. Or,
- you can login to the bbs and download the source for FREE if you already
- have the means to make your own proms.
-
- I think this project is being offered in the manner that most of us would
- like to see. The complaints have been about some who force you to buy their
- preprogrammed proms, etc. and won't let you have the source code. You have
- no option to personalize how it works, you have to take what they give you
- or do without, unless you can create your own from scratch.
-
- The real problem is that there is a conflict of interests in the minds of
- some project designers. We, the general ham public, have gotten used to
- the idea of receiving electronic circuit designs for free. Professional
- programmers on the otherhand are used to getting a price for their software
- creativity, they do it for a living. Even an average computer user cannot
- comprehend how much effort and time goes into software development. Software
- that is mass produced can be sold for <$100 and still make a good profit,
- because they can sell hundreds of thousands of copies. If they could only
- sell a few hundred copies, they would have to charge thousands of dollars
- to pay for the software development expenses.
-
- On the otherhand, as I actually have a foot in both doors, the ham world
- and the professional software programming world, I can understand the
- hesitation of those project designers who do not reveal their source codes.
- For now, I think we have to be patient and not worry too much this issue.
- As most of you net users are aware, there is more and more software becoming
- available for free on the net. I think this trend will also occur in ham
- projects requiring software. One thing we could encourage is starting a
- group of programmers on the net to work together on a programming project.
-
- Just another ham's 2 cents worth...
-
- 73,
- --
- Mont Pierce
-
- +-------------------------------------------------------------------------+
- | Ham Call: KM6WT Internet: mont@netcom.com |
- | bands: 80/40/20/15/10/2 IBM vnet: mont@ibmmail.com |
- | modes: cw,ssb,fm |
- +-------------------------------------------------------------------------+
-
- From qrp-request@Think.COM Thu Feb 3 11:54:11 1994
- Return-Path: <g-taylor4@tamu.edu>
- From: g-taylor4@tamu.edu
- via Charon-4.0-VROOM with IPX id 100.940203083023.5568;
- 03 Feb 94 09:06:22 +600
- Message-Id: <MAILQUEUE-99.940203083014.672@taex003n.tamu.edu>
- To: qrp@Think.COM
- >From: TAEX003N!GTAYLOR
- Date: 3 Feb 94 08:30:14 CDT
- Subject: Re: wire antennas for qrp
- Reply-To: g-taylor4@tamu.edu
- X-Mailer: Pegasus Mail v2.1c R5.
- Content-Type: text
- Content-Length: 1522
-
- > horizontal wires just fine also. You need only have lots of wire,
- > a decent antenna tuner, some supports and lots of imagination.
- > Hey, try a loop if you have the space. Just put out as much
- > wire as you can, as high as you can, and get on the air.
- >
- Thats been my experience, using about 100 ft of wire center fed with 450
- ohm at 25 feet I've got almost 200 countries mixed 5w or less. Have tried
- various other types - used a wire ground plane on 10 when it was hot,
- center, side and corner fed loops, etc. Never found a single element
- antenna at the height I can reach that was sufficiently better than the
- (G5RV to use one word) to make it permanent. About the only part of the
- world I have a real problem getting into with these antennas is over the
- pole into the Indian ocean area...VU, 4S7 etc. Could get into central asia
- (old(?) UL, UM) but just seems like the signal has a real problem making
- that one additional hop. Guess it would be take that 1 in 100 propagation
- opening that I'm never there for.
-
- 72, Greg
-
-
-
-
-
- ******************************************************************************
- Dr. Gregory S. Taylor !MAIL: 110 Dairy Science Building
- Extension Program Leader for ! College Station, TX 77843-2124
- Community Development !VOICE: 409-845-4445
- Texas Agricultural Extension Service!FAX: 409-847-8744
- Texas A&M University System !EMAIL: Reply or g-taylor4@tamu.edu
- ******************************************************************************
-
- From qrp-request@Think.COM Thu Feb 3 20:12:11 1994
- Return-Path: <DACOLEMAN@fair1.fairfield.edu>
- <01H8GA3BGAOK9354W5@fair1.fairfield.edu>; Thu, 3 Feb 1994 14:23:46 EST
- Date: 03 Feb 1994 14:23:46 -0500 (EST)
- From: "D A Coleman (ext. 2850)" <DACOLEMAN@fair1.fairfield.edu>
- Subject: Re: wire antennas for qrp
- To: g-taylor4@tamu.edu
- Cc: qrp@Think.COM
- Message-Id: <01H8GA3BGAOM9354W5@fair1.fairfield.edu>
- X-Vms-To: IN%"g-taylor4@tamu.edu"
- X-Vms-Cc: IN%"qrp@think.com"
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
- Content-Transfer-Encoding: 7BIT
-
- I'd just like to add that, if you are choosing between the greatest
- possible length and the greatest height, sacrificing some length, always
- go for the height--within reason, of course.
-
- 72
-
- Don Coleman, W1VOQ
-
- From qrp-request@Think.COM Thu Feb 3 22:42:23 1994
- Return-Path: <andy@clark.net>
- id AA27995; Thu, 3 Feb 94 22:42:15 EST
- Date: Thu, 3 Feb 1994 22:42:12 -0500 (EST)
- From: "Andrew M. Cohn" <andy@explorer.clark.net>
- Subject: Hotel room QRP operation/antenna
- To: qrp@Think.COM
- Message-Id: <Pine.3.89.9402032227.A27687-0100000@explorer>
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; charset=US-ASCII
- Content-Length: 406
-
- Being in the process of assembling a 5 watt, 40 meter QRP briefcase station,
- and, after reading some of the mail about qrp antennas, I am concerned
- about my proposed operation from hotel rooms during my travels. At best,
- I will have a window that can open. But more typically, my antenna will
- be confined to the single room. Wonder if anyone sees a glimmer of hope
- here....
-
- 73, andy/k4adl
- andy@clark.net
-
-
- From qrp-request@Think.COM Thu Feb 3 23:20:44 1994
- Return-Path: <randy@cyphyn.radnet.com>
- id m0pSI0j-0001t4C; Thu, 3 Feb 94 23:19 EST
- Message-Id: <m0pSI0j-0001t4C@cyphyn.radnet.com>
- From: randy@cyphyn.radnet.com (Randy)
- Subject: Bogus call!
- To: boatanchors@gnu.ai.mit.edu (Boatanchors Real radios)
- Date: Thu, 3 Feb 1994 23:19:17 -0500 (EST)
- Cc: qrp@Think.COM (qrp @think.com), pjk@Think.COM (Pete at Myth),
- psc@colmiks.colmiks.com,
- michael_nagorski@quickmail.cis.yale.edu (michael nagorski),
- jherman@hawaii.edu (Jeff in Hawaii),
- kludge@grissom.larc.nasa.gov (scott dorsey)
- X-Mailer: ELM [version 2.4 PL21]
- Content-Type: text
- Content-Length: 886
-
- Excuse my off-topic and crawling in anyones mailbox....
-
- We have, on 80mtrs, a bogus call: W3PXM...who is actually a silent key
-
- This was bumped into in the course of a qso, and some quite deliberate
- qrm was done...using that call.
-
- As we, in this area ( Connecticut, south central) have a 'known' trouble
- maker who has used others call often and pulled such stunts...it could
- quite likly be him.
-
- Stalking laws now prevent anyone from verifying if or not it is him/his house
- so.....
-
- But, at any rate, wanted to warn everyone about that call...it ain't 'PXM
-
- ak! I can hear him right now! using my call!
- dirt-bag!
-
- --
- Randy KA1UNW If you get a shock while
- servicing your equipment, "Works for me!"
- randy@192.153.4.200 DON'T JUMP! -Pete Keyes
- You might break an expensive tube!
-
- From qrp-request@Think.COM Fri Feb 4 00:19:58 1994
- Return-Path: <adams@chuck.dallas.sgi.com>
- for qrp@think.com id AA26849; Thu, 3 Feb 94 21:19:51 -0800
- for @sgi.sgi.com:qrp@think.com id AA24896; Thu, 3 Feb 94 23:19:38 -0600
- for @sgidal.dallas.sgi.com:qrp@think.com id AA02975; Thu, 3 Feb 94 23:19:34 -0600
- Date: Thu, 3 Feb 94 23:19:34 -0600
- From: adams@chuck.dallas.sgi.com (Chuck Adams)
- Message-Id: <9402040519.AA02975@chuck.dallas.sgi.com>
- To: qrp@Think.COM
- Subject: Hambrew Winter 1994 Issue
-
-
- Gang,
-
- The first issue for 1994 of Hambrew arrived last night. This
- is the first chance I've had today to sit down and get to type
- a review, so this is fast and dirty.
-
- 48 pages including front and back cover.
-
- Table of Contents:
-
- Letters...........................................4
- Kit Review: The MXM SupeRX/TXTX...................7
- Soldering and Parts Identification................9
- A Trio of T/R Switches...........................13
- New Products.....................................16
- A 2 Meter 5 Element Quad.........................19
- The 40 Meter Pipsqueak...........................21
- Neophyte Roundup, Part One.......................23
- The Right Stuff..................................26
- 8 Minute ID Timer................................27
- 20/20 Hindsight..................................29
- The Di-Conical Monopole Antenna..................31
- Modifying the Fire Ball..........................35
- A Sentimental Journey............................44
- Classified Ads...................................46
-
-
- I'd say there was some improvement, but the jury is
- still out on the $20 per year I spent on this puppy.
-
- For me, there is not enough meat between the pages.
-
- I will say that the MXM SupeRX/TX article, on the
- xtal controlled transmitter and SupeRX receiver,
- of which I own one, has one of the best jobs of
- painting of the case and lettering. The case, as
- it turns out, is one of mine. I did not plan this
- and Bruce of MXM has some of my cases and George
- De Grazio, WF0K, built up Bruce's kit and put it
- in the case. George did do a good job.
-
-
- dit dit
- Chuck Adams K5FO CP-60 wpm
- adams@sgi.com
-
-
-
-
- From qrp-request@Think.COM Fri Feb 4 00:30:30 1994
- Return-Path: <adams@chuck.dallas.sgi.com>
- for qrp@think.com id AA27475; Thu, 3 Feb 94 21:30:24 -0800
- for @sgi.sgi.com:qrp@think.com id AA24906; Thu, 3 Feb 94 23:30:16 -0600
- for @sgidal.dallas.sgi.com:qrp@think.com id AA03005; Thu, 3 Feb 94 23:30:12 -0600
- Date: Thu, 3 Feb 94 23:30:12 -0600
- From: adams@chuck.dallas.sgi.com (Chuck Adams)
- Message-Id: <9402040530.AA03005@chuck.dallas.sgi.com>
- To: qrp@Think.COM
- Subject: K5FO dit dit
-
-
- Gang,
-
- On Friday, February 4th, 1994, Chuck Adams, K5FO,
- will be leaving the internet. The time for which
- I will be gone is dependent upon a number of factors.
-
- I have been going night and day for a lengthy period
- of time. I need the rest, so I'm taking a leave of
- absence and thus, will lose my place on the net.
-
- You guys and girls have been great and I have throughly
- enjoyed the exchanges going on here. There is a wealth
- of knowledge and it is my wish that each and everyone
- of you continue to keep up the good work. Be good to
- each other and yourselves.
-
- Don't keep it to yourselves. Spread the word. QRP and
- QRPp is here to stay. Get off your laurels and write
- your experiences, good and bad, and put them in print.
- Do it in the QQ, QRPp, and start and contribute to local
- news letters. You learn and so do the readers.
-
- I have met some new friends and will not disappear from
- the face of the earth. You'll hear my little peanut CW
- signal on or near the QRP ARCI calling frequencies. If
- you hear me, holler. I will go at your speed, no matter
- what it is.
-
- My thanks to each everyone. God Bless and Keep You.
-
- Special thanks to Bruce for keeping the QRP mailing group
- alive and well. I leave you all in good hands. See you
- at Dayton.....
-
- dit dit
-
- Chuck Adams, K5FO and I'm good in the callbook for the last 6 years.
-
- --------------------------cut here------------------------
- <<<<<<<<<<<<<<<<<<<<<<<<<<<SNAP>>>>>>>>>>>>>>>>>>>>>>>>>>>
-
- Chuck Adams K5FO CP-60 wpm
- adams@sgi.com
-
-
-
-
- From qrp-request@Think.COM Fri Feb 4 00:39:40 1994
- Return-Path: <randy@cyphyn.radnet.com>
- id m0pSJDI-0001t4C; Fri, 4 Feb 94 00:36 EST
- Message-Id: <m0pSJDI-0001t4C@cyphyn.radnet.com>
- From: randy@cyphyn.radnet.com (Randy)
- Subject: Re: Hotel room QRP operation/antenna
- To: andy@explorer.clark.net (Andrew M. Cohn)
- Date: Fri, 4 Feb 1994 00:36:20 -0500 (EST)
- Cc: qrp@Think.COM (qrp @think.com)
- In-Reply-To: <Pine.3.89.9402032227.A27687-0100000@explorer> from "Andrew M. Cohn" at Feb 3, 94 10:42:12 pm
- X-Mailer: ELM [version 2.4 PL21]
- Content-Type: text
- Content-Length: 1727
-
- Ah! so THATS where you plan to run from....OK...
-
- Get a 9' chicken band whip...fibreglass job.
-
- Make up a C-clamp and angle bracket that can grip a window sill.....
- or arrange some kinfd of support to hold the whip ,poking out the
- window, from inside.
-
- Now...make an 80 turn coil on some 3" pvc pipe....18 -- 14 ga wire will
- do....space out the turns to not short ( bare wire we are talking about)
- and rig up all this:
-
- /
- / whip 45 deg angled
- /
- /
- coil /
- A o--uuuuuuuuuu---O
- | V tap
- +----o
-
- G o----------o< gnd to radiator or other large metal somthing
-
- THAT, you feed via very short coax to your tuner...
-
- Here's why:
- That mess up there only resonates the ant
- Your 'tuner' only adjusts the in/out Z unless you
- like lots of loss forcing it to also resonate
- an antenna not resonant. ----
- ( not enough ckts in a tuner to do BOTH)
- Have ready
- a few caps of 470uuf 500v to add across A G to help
- tuner reach the very low Z for 80 and 40 mtrs use.
- (ant loaded ant like that wants to offer a very low Z)
-
- That, should do you.
-
- You can do the same trick with some random wire slung across the room
- by subbing the whip in that drawing above, with your wire.
- You still need fasten up to some pipe or other large metal somthing
- for your counterpoise/ground.
-
- Have fun!
-
-
- --
- Randy KA1UNW If you get a shock while
- servicing your equipment, "Works for me!"
- randy@192.153.4.200 DON'T JUMP! -Pete Keyes
- You might break an expensive tube!
-
- From qrp-request@Think.COM Fri Feb 4 05:48:58 1994
- Return-Path: <PENC@psumeteo.psu.edu>
- Fri, 4 Feb 94 10:48:48 GMT
- Date: Fri, 4 Feb 94 10:40:03 GMT
- From: PENC@psumeteo.psu.edu
- Subject: More bogus calls...
- To: qrp@Think.COM
- X-Vms-Mail-To: EXOS%"qrp@think.com"
- Message-Id: <940204104003.2740D605081@psumeteo.psu.edu>
-
- Randy (& Gang):
- While we're on the topic of bogus calls, you're apparently not alone. A
- couple years ago I bec
- gan receiving QSLs from various contests for a call
- (WB2B) I relinquished some years ago (moved to three-land, then back to
- two and at the time preferred to have a call corresponding to my geographical
- location). Later I received an OO report from an ARRL observer stating "I"
- was out of band, and using a relinquished call-- asking "me" why I was doing
- so. The OO never answered me, but the QSLs stopped flowing (at least for now).
- I suspect there are quite a few lower class operators who scout the callbooks
- for unused calls ( silent keyes, callsign changes -- now XX#X) and pirate them
- especially for contesting.
- If the FCC allows reissuance of callsigns, then maybe this will be more diffi-
- cult to do.
- I haven't operated HF in *YEARS* (apartment life and working on PhD leaves
- not much room/time for ham radio). Anyways it does seem to happen, and Randy's
- case is not isolated. If you do contact WB2B, it is not the real "ex" WB2B.
-
-
-
- de WK2A
- penc@psumeteo.psu.edu
-
- From qrp-request@Think.COM Fri Feb 4 10:17:31 1994
- Return-Path: <jkearman@arrl.org>
- id AA22008 for qrp@think.com; Fri, 4 Feb 94 10:17:32 -0500
- (Smail3.1.28.1 #6) id m0pSSGD-000BAEC; Fri, 4 Feb 94 10:15 EST
- id AA16596 ; Fri, 04 Feb 94 10:03:59 GMT
- Date: Fri, 04 Feb 94 15:08:24 GMT
- Message-Id: <8868@jek>
- From: jkearman@arrl.org (Jim Kearman)
- To: QRP@Think.COM
- Subject: NorCal 40 Kits Available?
-
- Need one for possible QST Product Review, but only if
- kits will be available in the future.
-
- Pse email direct to jkearman@arrl.org
-
- 72/73
-
- Jim, KR1S
-
-
-
- From qrp-request@Think.COM Fri Feb 4 10:59:34 1994
- Return-Path: <andy@clark.net>
- id AA15153; Fri, 4 Feb 94 10:59:09 EST
- Date: Fri, 4 Feb 1994 10:59:08 -0500 (EST)
- From: "Andrew M. Cohn" <andy@explorer.clark.net>
- Subject: The "MouseKey"
- To: qrp@Think.COM
- Message-Id: <Pine.3.89.9402041011.A15025-0100000@explorer>
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; charset=US-ASCII
- Content-Length: 1389
-
- Gang...
-
- Here's an idea for a MouseKey some of you might find useful. Personally,
- I don't care for the standard straight key, and I needed a durable key
- for the briefcase QRP station I'm putting together.
-
- At a hamfest, I found a used 3-button mouse for $5. I rewired the guts so
- that two conductors of the cable went directly to the left button. Then I
- wired the right button in parallel. Next, I cut off the serial
- connector and replaced it with a mini jack. Finally, I stuck on 4 flat
- rubber feet at the bottom, along with Velcro (tm). The feet gave the
- mouse stability, and the Velcro allowed the mouse to be attached to the
- side of the rig for side-keying.
-
- Most of you probably have a mouse attached to your computer, and you may
- have absentmindedly tapped out morse code with it. Actually, with a
- miminum of practice, you'll find a mouse makes a great key. In fact, it
- will probably work well as a paddle for an electronic keyer, by wiring
- the left button for dits and the right for dahs!
-
- You can use the MouseKey as you would a regular mouse (with your palm over
- it's body), or you can turn it around 180 degrees and use it more like a
- standard straight key. Even as a straight key, you can use your index
- finger for dits, and the third finger for dahs. Probably, it would work
- well in a mobile installation.
-
- Just a thought. Anyway, it works for me!
-
- andy/k4adl
-
-
-
-
- From qrp-request@Think.COM Fri Feb 4 11:39:41 1994
- Return-Path: <D.R._Shalita.ES_AE@xerox.com>
- X-Ns-Transport-Id: 0000AA0097D468A730FE
- Date: Fri, 4 Feb 1994 08:39:12 PST
- Sender: D.R._Shalita.ES_AE@xerox.com
- From: david_shalita.es_ae@xerox.com
- Subject: nn1g-mkII parts lists, etc
- To: QRP@Think.COM
- Cc: david_shalita.es_ae@xerox.com
- Reply-To: david_shalita.es_ae@xerox.com
- Message-Id: <" 4-Feb-94 8:39:12 PST".*.D.R._Shalita.ES_AE@Xerox.com>
-
- Hi,
- I am trying to build a printed wiring board set for the
- nn1g-mkII transceiver from the files on the QRP FTP SERVER
- at Think.com.
-
- I've located the rx and tx board artwork files in
- sub-directory \qrp\artwork\nn1g_mkII
-
- Can someone help me locate the files containing for the RX and TX
- boards:
- 1. Component Stuffing Diagrams
- 2. Part Lists
- 3. Schematics
-
- Do the files located in
- sub-directory \qrp\artwork\nn1g_mkI
- nn1g.mark1.parts
- nn1g.mark1.ps
-
- apply to nn1g_mkII project?
-
- Can someone list all of the need files and locations for that project?
-
- Looking forward to more buildable QRP projects.
-
- Appreciate any help.
- Thanks,
-
- 73 Dave, w6mik
-
- From qrp-request@Think.COM Fri Feb 4 12:41:19 1994
- Return-Path: <randolph@est.enet.dec.com>
- id AA27641; Tue, 1 Feb 94 14:02:40 -0800
- Message-Id: <9402012202.AA27641@enet-gw.pa.dec.com>
- Date: Tue, 1 Feb 94 14:02:40 PST
- From: N1OOQ Tom R. @ MRO1 01-Feb-1994 1652 <randolph@est.enet.dec.com>
- To: qrp@Think.COM
- Apparently-To: qrp@think.com
- Subject: QRP Notebook shopping list
-
- Ok, I had one request, so I guess that's good enough! 8-)
-
- I, believe it or not, went through all the schematics in QRP Notebook and
- compiled this list of parts needed. This is everything that appeared more than
- once or twice. If it has a + next to it, buy lots of them! Oh BTW, some of the
- important stuff, like air variable caps, are in onesie-twosie amounts, so they
- don't show here.
-
- So now you all know what to stock up on for a QRP junk box...
-
- Transistors Amidon cores Diodes Electrolytic Var Caps Chokes
- 2N2222A+ T24-43 1N914+ or Tantulum 100 trim+ 1mH+
- 2N3553 T37-6+ 1+ 22uH+
- 2N3866 T50-2+ 2.2+ 15uH
- 2N3904+ T50-6+ 4.7 10uH
- 2N4400+ T68-2+ 10+
- 2N4401+ T68-6 22+ (16 & 25V)
- 2N4403+ FT37-43+ 220
- 2N4416+ FT50-43+
- 2N5179+ FT50-63
- MPF102+ BLN43-202
- 40673 Bead, 850mu
-
- Pots NP0 Caps Caps Hardware Op Amps
- 100k+ 0.001++ (102) 150 6-32 741
- 10k+ 0.01++ (103) 68 4-40 747
- 1k 0.1++ (104) TL081
- LM386
-
- Resistors 1/4w 1/2w
- 10+ 100++ 1.0k++ 10k++ 100k++
- 15 150 1.5k+ 12k 220k+
- 22 180+ 2.2k+ 15k 470k+
- 33+ 220 2.7k 22k+
- 47+ 270+ 3.3k+ 27k+
- 56+ 390 3.9k 33k
- 470+ 4.7k+ 47k+
- 560+ 5.6k+ 56k+
-
- -Tom R. N1OOQ randolph@est.enet.dec.com
-
- From qrp-request@Think.COM Fri Feb 4 12:45:11 1994
- Return-Path: <jaevans@clark.net>
- id AA20533; Fri, 4 Feb 94 12:44:20 EST
- Date: Fri, 4 Feb 1994 12:44:18 -0500 (EST)
- From: "John A. Evans" <jaevans@explorer.clark.net>
- Subject: Re: NorCal 40 Kits Available?
- To: Jim Kearman <jkearman@arrl.org>
- Cc: QRP@Think.COM
- In-Reply-To: <8868@jek>
- Message-Id: <Pine.3.89.9402041245.A20381-0100000@explorer>
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; charset=US-ASCII
- Content-Length: 1140
-
-
-
- On Fri, 4 Feb 1994, Jim Kearman wrote:
-
- > Need one for possible QST Product Review, but only if
- > kits will be available in the future.
- >
- > Pse email direct to jkearman@arrl.org
- >
- > 72/73
- >
- > Jim, KR1S
-
- I would love one, too, but am willing to sacrifice any chance of getting
- on for a guaranteed issue of the Sierra.
-
- As I understand it, all of the new batch are committed and the club has
- no plans for further batches, in order to concentrate on the Sierra design.
-
- Still, wouldn't it be nice to get both &^)
-
- 72
-
- -------------------------------------------------------------------------------
- John A. Evans, Capt, USAF "My number one goal as a
- VHDL/EDA Engineer runner is to live long enough
- N3QOO Tech Plus !!! to place in my age group!!!"
-
- jaevans@clark.net Linux - the OS of choice !!
- -------------------------------------------------------------------------------
- Once data encryption is outlawed, only outlaws will have data encryption !!!
- -------------------------------------------------------------------------------
-
-
- From qrp-request@Think.COM Fri Feb 4 13:20:36 1994
- Return-Path: <jkearman@arrl.org>
- id AA26836 for qrp@think.com; Fri, 4 Feb 94 13:20:39 -0500
- (Smail3.1.28.1 #6) id m0pSV7L-000BAEC; Fri, 4 Feb 94 13:18 EST
- id AA17110 ; Fri, 04 Feb 94 13:08:40 GMT
- Date: Fri, 04 Feb 94 18:08:38 GMT
- Message-Id: <8926@jek>
- From: jkearman@arrl.org (Jim Kearman)
- To: QRP@Think.COM
- Subject: Club Kits for Review
-
- I've changed my mind. It's really not a good idea for QST
- to review club kits, as they come and go so fast. By the
- time we got the review in print the stock would be sold
- out. I understand that some second sources are kitting
- up parts for some projects, but the parts quality seems
- to vary all over the landscape, so a review isn't valid.
-
- We MAY consider reviewing commercial kits in the future,
- sort of a one-shot comparative review of stuff we haven't
- looked at already. Please don't volunteer to build a kit
- for us. This hasn't worked out well in the past; we prefer
- to keep tighter control over assembly, alignment and
- testing. It's the least we can do for our readers.
-
- By the way, you may be interested in how the process works.
- A staffer is selected from volunteers, by the Product
- Review editor, Mark Wilson, AA2Z. The staffer must be
- qualified, of course. As bad as my eyesight is getting,
- I'm not sure I'm qualified! The kit is built on the
- reviewer's time, but testing is done by the lab staff.
- The reviewer has the option of keeping the kit or being
- paid for writing the review. In the latter case, the kit
- is offered for sealed-bid auction in QST.
-
- 73
-
- Jim, KR1S
-
-
-
- From qrp-request@Think.COM Fri Feb 4 14:09:54 1994
- Return-Path: <jfw@ksr.com>
- id AA15479; Fri, 4 Feb 1994 14:08:24 -0500
- id AA14950; Fri, 4 Feb 94 14:08:29 EST
- id AA18226; Fri, 4 Feb 94 14:08:27 EST
- Message-Id: <9402041908.AA18226@kaos.ksr.com>
- id AA25381; Fri, 4 Feb 94 14:08:23 EST
- To: N1OOQ Tom R. @ MRO1 01-Feb-1994 1652 <randolph@est.enet.dec.com>
- Cc: qrp@Think.COM, jfw@ksr.com
- Subject: Re: QRP Notebook shopping list
- In-Reply-To: Your message of "Tue, 01 Feb 94 14:02:40 PST."
- <9402012202.AA27641@enet-gw.pa.dec.com>
- Date: Fri, 04 Feb 94 14:08:22 EST
- From: "John F. Woods" <jfw@ksr.com>
-
- Tom R. writes:
- > I, believe it or not, went through all the schematics in QRP Notebook and
- > compiled this list of parts needed.
-
- And a fine list it was, indeed (which I plan to compare against my collection
- tonight in case I've missed anything :-), but there's one minor trap
- awaiting:
-
- The 40673 is no longer in production, and apparently replacements for it are
- getting scarce as well. I *think* the 3N200 is a good replacement, but it may
- not be being produced as well. Danny Stevig's catalog newsletters usually
- mention whichever dual-gate MOSFET he's managed to stock up on most recently.
-
- It's kind of a shame, really; there's a few parts that are sort of icons for
- their device type (2N2222, MPF102, 1N914, 1N4001), but there's no longer an
- icon for the dual-gate mosfet...
-
- John, WB7EEL
-
- From qrp-request@Think.COM Fri Feb 4 14:28:25 1994
- Return-Path: <jaevans@clark.net>
- id AA26369; Fri, 4 Feb 94 14:28:08 EST
- Date: Fri, 4 Feb 1994 14:28:08 -0500 (EST)
- From: "John A. Evans" <jaevans@explorer.clark.net>
- Subject: Re: QRP Notebook shopping list
- To: N1OOQ@explorer.clark.net
- Cc: qrp@Think.COM
- In-Reply-To: <9402012202.AA27641@enet-gw.pa.dec.com>
- Message-Id: <Pine.3.89.9402041452.A26286-0100000@explorer>
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; charset=US-ASCII
- Content-Length: 808
-
-
-
- >
- > -Tom R. N1OOQ randolph@est.enet.dec.com
- >
- Tom - I'd mail directly, but it bounces !!!
-
- BTW - like your call sign
-
- thanks for the parts list - a good place to start!
-
- john
- N3QOO
-
- -------------------------------------------------------------------------------
- John A. Evans, Capt, USAF "My number one goal as a
- VHDL/EDA Engineer runner is to live long enough
- N3QOO Tech Plus !!! to place in my age group!!!"
-
- jaevans@clark.net Linux - the OS of choice !!
- -------------------------------------------------------------------------------
- Once data encryption is outlawed, only outlaws will have data encryption !!!
- -------------------------------------------------------------------------------
-
-
- From qrp-request@Think.COM Fri Feb 4 14:55:56 1994
- Return-Path: <JMG@tntech.edu>
- <01H8HNCHUL6MDU858V@tntech.edu>; Fri, 4 Feb 1994 13:57:39 CST
- Date: Fri, 04 Feb 1994 13:57:39 -0600 (CST)
- From: "JEFF M. GOLD" <JMG@tntech.edu>
- Subject: MXM
- To: qrp@Think.COM
- Message-Id: <01H8HNCHUL68DU858V@tntech.edu>
- X-Vms-To: IN%"qrp@think.com"
- X-Vms-Cc: JMG
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
- Content-Transfer-Encoding: 7BIT
-
- My faith in kits is starting to come back.. after my recent exeriences
- with the Radio Kit kit (and thanks to everyone.. I finally did figure
- out what was meant by "link").
-
- I received my MXM new QRP 20 meter transceiver kit that Chuck has
- written about. I built one of the original MXM transmitter/receivers..
- was crystal controlled.. pretty neat.. put it in a tiny box.. but had
- too much trouble with being stuck on a single transmitt frequency.. so
- still it sits.. anyone want to buy it cheap?
-
- Opened the box carefully and started looking at what was contained
- therein....The different parts for each stage of the radio are packaged
- seperately. Attached to the bag of parts is a very nicely printed list
- of the parts. The board is CLEARLY silk screened. The schematic and
- overlay are clear and seem easy to read (what a novel idea). the case
- that came with it looked REAL familiar.. same as the one i got from
- Chuck Adams... the case is not pre-punched or labeled. One small board..
- plenty of room in the case for keyer and additional filters.
-
- The directions say to built the radio a stage at a time and test each
- out.. I like this concept.
-
- Well that is about as far as I got.. but think I can plan on enjoy
- building this one.. and I believe it already has the "Adams" stamp of
- approval..so I can rest easy.
-
-
- 72
-
- Jeff, AC4HF
-
- From qrp-request@Think.COM Fri Feb 4 14:57:25 1994
- Return-Path: <JMG@tntech.edu>
- <01H8HNJR6084DU858V@tntech.edu>; Fri, 4 Feb 1994 13:59:25 CST
- Date: Fri, 04 Feb 1994 13:59:25 -0600 (CST)
- From: "JEFF M. GOLD" <JMG@tntech.edu>
- Subject: Oak Hills
- To: qrp@Think.COM
- Message-Id: <01H8HNJR6086DU858V@tntech.edu>
- X-Vms-To: IN%"qrp@think.com"
- X-Vms-Cc: JMG
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
- Content-Transfer-Encoding: 7BIT
-
- Latest breaking news!!!
-
- rumor has it that Oak Hills will in the VERY near future (couple of
- weeks?) come out with a new offering... a dual band 20/40 QRP
- transceiver. It will be in the Spirit Box.. and think a lot of the
- circuitry will be similiar. ..don't think it will have the keyer
- though..
-
- Well..my two favorite bands...so I am excited.
-
- 72,
-
- Jeff, AC4HF
-
- From qrp-request@Think.COM Fri Feb 4 14:57:29 1994
- Return-Path: <cmwdr01@nt.com>
- X400-Received:
- by mta mcigate in /PRMD=NT/ADMD=MCI/C=US/; Relayed; Fri, 4 Feb 1994 13:56:58 -0600
- X400-Received:
- by /PRMD=NT/ADMD=MCI/C=US/; Relayed; Fri, 4 Feb 1994 13:56:50 -0600
- X400-Received:
- by /PRMD=NT/ADMD=MCI/C=US/; Relayed; Fri, 4 Feb 1994 08:56:00 -0600
- Date: Fri, 4 Feb 1994 14:56:00 +0000
- X400-Originator: /DD.ID=cmwdr01/G=William/I=WD/S=Redfearn/@nt.com
- X400-Mts-Identifier:
- [/PRMD=NT/ADMD=MCI/C=US/;mcigate.nt.285:04.01.94.19.56.50]
- X400-Content-Type: P2-1984 (2)
- Content-Identifier: RE: Mousekey
- From: "William (W.D.) Redfearn" <cmwdr01@nt.com>
- Sender: "William (W.D.) Redfearn" <cmwdr01@nt.com>
- Message-Id: <"15286 Fri Feb 4 13:56:53 1994"@nt.com>
- To: qrp@Think.COM
- Subject: RE: Mousekey
-
- About six months ago I built a mousekey for my keyer to see how it would
- work for mobile operation.
- I scrounged up a three button mouse, cut off the serial connector, installed
- a plug to fit the keyer (1/8" stereo), and wired the left button to make dots
- and the right button for dashes.
- The feel was considerably different from the regular paddles, but with some pra
- ctice, I could manage a decent 13-15 wpm. I was able to use the heel of my hand
- to hold the mouse down which left my fingers free to key. A velcro strap or som
- ething similar to hold the mouse to my leg might work good too.
- At any rate the mouse worked out to be a cheap and resonably effective set of
- paddles. It did get a lot of attention during a CW open house during a
- Cary ARC club meeting.
- 73 - Dave.
-
- ====================================================================
- Dave Redfearn, SR PC LAN Analyst Northern Telecom RTP, NC.
- ph.(919) 992-3925 email: cmwdr01@nt.com qrl? de N4ELM/qrp
-
- All opinions are my own and do not necessarily reflect the views of
- my employer, co-workers or any other person, real or imaginary.
-
- From qrp-request@Think.COM Fri Feb 4 14:58:30 1994
- Return-Path: <JMG@tntech.edu>
- <01H8HNLZJ996DU858V@tntech.edu>; Fri, 4 Feb 1994 14:00:19 CST
- Date: Fri, 04 Feb 1994 14:00:19 -0600 (CST)
- From: "JEFF M. GOLD" <JMG@tntech.edu>
- Subject: QST
- To: qrp@Think.COM
- Message-Id: <01H8HNLZJ998DU858V@tntech.edu>
- X-Vms-To: IN%"qrp@think.com"
- X-Vms-Cc: JMG
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
- Content-Transfer-Encoding: 7BIT
-
- HI,
-
- did anyone else see the article in this month's QST on the QSOcorder..
- sounds like fun..
-
- 72
-
- Jeff, AC4Hf
-
- From qrp-request@Think.COM Fri Feb 4 16:02:36 1994
- Return-Path: <laurahal@microsoft.com>
- id AA28817; Fri, 4 Feb 94 13:03:21 -0800
- Message-Id: <9402042059.AA24747@itgmsm>
- From: laurahal@microsoft.com
- To: jfw@ksr.com, qrp@Think.COM, randolph@est.enet.dec.com
- Subject: Re: QRP Notebook shopping list
- Date: Fri, 04 Feb 94 12:58:00 PST
- X-Mailer: Microsoft Mail V3.0
-
-
- Joh WB7EEL writes:
-
- > The 40673 is no longer in production, and apparently replacements for it
- are
- > getting scarce as well. I *think* the 3N200 is a good replacement, but it
- may
- > not be being produced as well. Danny Stevig's catalog newsletters usually
- > mention whichever dual-gate MOSFET he's managed to stock up on most
- recently.
-
- The last time I needed some 40673s I went to the parts store and bought some
- NTE222s from the NTE/ECG replacement parts line. Have *they* gone out of
- production too?
-
- 73 from Burnaby,
- laura VE7LDH
-
- From qrp-request@Think.COM Fri Feb 4 16:40:41 1994
- Return-Path: <HEACOCK@KUHUB.CC.UKANS.EDU>
- id <01H8HQNXMC2S9GW377@KUHUB.CC.UKANS.EDU>; Fri,
- 4 Feb 1994 15:40:09 CST (UTC -06:00)
- Date: Fri, 04 Feb 1994 15:40:09 -0600 (UTC -06:00)
- From: Doug Heacock <HEACOCK@KUHUB.CC.UKANS.EDU>
- Subject: RCA 40673 replacements
- To: qrp@Think.COM
- Message-Id: <01H8HQNXMD0M9GW377@KUHUB.CC.UKANS.EDU>
- X-Vms-To: IN%"qrp@Think.COM"
- X-Vms-Cc: HEACOCK
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
- Content-Transfer-Encoding: 7BIT
-
- >And a fine list it was, indeed (which I plan to compare against my collection
- >tonight in case I've missed anything :-), but there's one minor trap
- >awaiting:
- >
- >The 40673 is no longer in production, and apparently replacements for it are
- >getting scarce as well. I *think* the 3N200 is a good replacement, but it may
- >not be being produced as well. Danny Stevig's catalog newsletters usually
- >mention whichever dual-gate MOSFET he's managed to stock up on most recently.
- >
- >It's kind of a shame, really; there's a few parts that are sort of icons for
- >their device type (2N2222, MPF102, 1N914, 1N4001), but there's no longer an
- >icon for the dual-gate mosfet...
- >
- >John, WB7EEL
-
- At least two of the replacement-parts indexes/catalogs list
- replacement parts for the 40673, 3N200, and 3N202--I haven't actually
- used these devices, but here are the numbers, in case anyone is
- interested:
-
- Dual-gate N-channel MOSFETs
-
- Device Replacements
- ------ ------------
- 40673 NTE222, SK3050
- 3N200 NTE222, SK3065
- 3N202 NTE454, SK3991
-
- The Mouser catalog #574 (good until 7/31/93, the most recent one I've
- got at the office) shows the NTE222 available for $3.90; none of the
- other replacements are listed in that particular catalog.
-
- I hope this is useful.
-
- 73 de aa0ms
- --
- =================================================================
- Doug Heacock, KANREN User Services | heacock@ukanaix.cc.ukans.edu
- Academic Computing Services | heacock@kuhub.cc.ukans.edu
- The University of Kansas | heacock@ukanvax.bitnet
- Lawrence, Kansas 66045 | Amateur radio: AA0MS
- =================================================================
-
- From qrp-request@Think.COM Fri Feb 4 17:01:28 1994
- Return-Path: <mvjf@mvubr.att.com>
- Message-Id: <9402042201.AA07646@Early-Bird.Think.COM>
- From: mvjf@mvubr.att.com
- Date: Fri, 4 Feb 94 15:48 EST
- Original-From: mvubr!mvjf (James M Fitton +1 508 960 2577)
- To: QRP@Think.COM
- Subject: QSOcorder
-
-
- I acquired a defunct telephone answering machine with
- a digital signal processor....digital message recording.
-
- You can call CQ into it and it will record it digitally.
- Just press the button.... 16 seconds of fine audio or
- 32 seconds of coarse audio.
- Bet it would work for CW also.
-
-
- 73/72 Jim Fitton, W1FMR QRP-NE mvjf@mvubr.att.com
-
- From qrp-request@Think.COM Fri Feb 4 17:18:17 1994
- Return-Path: <adams@chuck.dallas.sgi.com>
- for qrp@think.com id AA00625; Fri, 4 Feb 94 14:18:11 -0800
- for @sgi.sgi.com:qrp@think.com id AA00232; Fri, 4 Feb 94 16:17:52 -0600
- for @sgidal.dallas.sgi.com:qrp@think.com id AA06588; Fri, 4 Feb 94 16:02:51 -0600
- Date: Fri, 4 Feb 94 16:02:51 -0600
- From: adams@chuck.dallas.sgi.com (Chuck Adams)
- Message-Id: <9402042202.AA06588@chuck.dallas.sgi.com>
- To: qrp@Think.COM
- Subject: Oak Hills Rumor de AC4HF
-
-
- Jeff,
-
- didn't i post info about this more than a month ago?
-
- someone check the archives. see, i knew i was being ignored. :-)
-
- just had to get in one more post. :-) ;-)
-
-
- dit dit
-
- Chuck Adams K5FO CP-60 wpm
- adams@sgi.com
-
-
-
-
-