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- Date: Thu, 24 Mar 94 13:41:44 PST
- From: Info-Hams Mailing List and Newsgroup <info-hams@ucsd.edu>
- Errors-To: Info-Hams-Errors@UCSD.Edu
- Reply-To: Info-Hams@UCSD.Edu
- Precedence: Bulk
- Subject: Info-Hams Digest V94 #325
- To: Info-Hams
-
-
- Info-Hams Digest Thu, 24 Mar 94 Volume 94 : Issue 325
-
- Today's Topics:
- ATTN: ARRL Newington Staff
- Communications to Sarajevo -- update
- Daily Summary of Solar Geophysical Activity for 23 March
- Equipment Users Groups??
- FT-5200: Deaf in Aircraft Band (118-136MHz)?
- FT-5200: Interesting changes after mod
- Grid Squares & Lat/Long
- Is 10M Dead?!
- Kenwood (TS-850) Computer Interface Info Wanted (2 msgs)
- Modifications to the Kenwood TH741???
- Need info on Icom (delta)1A HT
- RF and AF speech processors.
- Voice mail on a repeater?
- Yaesu ft530 question
-
- Send Replies or notes for publication to: <Info-Hams@UCSD.Edu>
- Send subscription requests to: <Info-Hams-REQUEST@UCSD.Edu>
- Problems you can't solve otherwise to brian@ucsd.edu.
-
- Archives of past issues of the Info-Hams Digest are available
- (by FTP only) from UCSD.Edu in directory "mailarchives/info-hams".
-
- We trust that readers are intelligent enough to realize that all text
- herein consists of personal comments and does not represent the official
- policies or positions of any party. Your mileage may vary. So there.
- ----------------------------------------------------------------------
-
- Date: 24 Mar 1994 15:21:12 GMT
- From: ihnp4.ucsd.edu!swrinde!gatech!udel!news.sprintlink.net!news.clark.net!andy@network.ucsd.edu
- Subject: ATTN: ARRL Newington Staff
- To: info-hams@ucsd.edu
-
- Hi Folks...
-
- I will be in Newington on business during the last few days of this
- month, and I'm wondering about how far it might be from my hotel on
- Columbus Boulevard in New Britain to your HQ?
-
- Also, I would appreciate knowing if there any professional videography
- services that you could recommend in the Newington/New Britain area.
- Maybe in the past at HQ you may have retained a video production service
- that you could recommend to me?
-
- Many thanks for your help! andy/k4adl andy@clark.net
-
- ------------------------------
-
- Date: Thu, 24 Mar 1994 15:10:29 GMT
- From: world!slm@uunet.uu.net
- Subject: Communications to Sarajevo -- update
- To: info-hams@ucsd.edu
-
- Thanks to all the people who wrote and called their legislators in
- Washington to support Congressman Markey's efforts to get the UNHCR to
- agree to fly telecommunications equipment to Sarajevo!!! This satellite
- switching station would restore international phone service in and out of
- the city, which was cut off by Serbian forces in the summer of 1992.
- The UNHCR had denied an initial request to transport the equipment into
- Sarajevo's airport, saying it wasn't "humanitarian assistance." As a
- result, one of the few channels of communication in and out of Sarajevo
- has been ham radio -- this has been going on for more than a year and
- a half, and our colleagues in Bosnia have really been swamped with request
- from Bosnians abroad desperate for word of their loved ones trapped in
- the war.
-
- I JUST RECEIVED WORD FROM CONGRESSMAN MARKEY'S OFFICE TODAY (March 24) THAT
- UNHCR HAS AGREED TO FLY THE EQUIPMENT INTO SARAJEVO!!!
-
- The equipment should be leaving for Zagreb soon, probably next week. It's
- hard to predict when it will be transported from the UN warehouse in
- Zagreb to Sarajevo, that might take a few weeks. Nor, unfortunately, can
- anyone predict whether there's going to be a problem with Serbian forces
- trying to block the equipment from going into Sarajevo, I really HOPE not...
- Finally, I don't know how long it will take once the equipment is in the
- city to have it connected and functioning. I hope soon!!!!!
-
- I hope very much that people will soon be able to make regular phone calls
- between the U.S. and Sarajevo.
-
- Again, thanks to all who supported this effort!!!!!
-
- Sharon KC1YR
-
-
- --
- electronic address: slm@world.std.com
-
- ------------------------------
-
- Date: Wed, 23 Mar 1994 23:38:58 MST
- From: ihnp4.ucsd.edu!swrinde!gatech!newsxfer.itd.umich.edu!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@network.ucsd.edu
- Subject: Daily Summary of Solar Geophysical Activity for 23 March
- To: info-hams@ucsd.edu
-
- /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
-
- DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY
-
- 23 MARCH, 1994
-
- /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
-
- (Based In-Part On SESC Observational Data)
-
-
- SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 23 MARCH, 1994
- ---------------------------------------------------------
-
- NOTE: A large area of strengthening stratospheric warming exists from
- southern to eastern Europe and southwestern Siberia.
-
- !!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 082, 03/23/94
- 10.7 FLUX=091.8 90-AVG=105 SSN=032 BKI=3432 3321 BAI=013
- BGND-XRAY=B1.1 FLU1=2.4E+06 FLU10=1.7E+04 PKI=3533 4322 PAI=017
- BOU-DEV=020,060,029,019,025,025,013,008 DEV-AVG=024 NT SWF=00:000
- XRAY-MAX= B3.9 @ 2038UT XRAY-MIN= A8.6 @ 1111UT XRAY-AVG= B1.4
- NEUTN-MAX= +002% @ 1325UT NEUTN-MIN= -002% @ 2010UT NEUTN-AVG= +0.0%
- PCA-MAX= +0.1DB @ 0220UT PCA-MIN= -0.4DB @ 0805UT PCA-AVG= -0.0DB
- BOUTF-MAX=55340NT @ 0520UT BOUTF-MIN=55310NT @ 1908UT BOUTF-AVG=55328NT
- GOES7-MAX=P:+000NT@ 0000UT GOES7-MIN=N:+000NT@ 0000UT G7-AVG=+069,+000,+000
- GOES6-MAX=P:+125NT@ 1941UT GOES6-MIN=N:-101NT@ 0505UT G6-AVG=+089,+024,-045
- FLUXFCST=STD:095,095,095;SESC:095,095,095 BAI/PAI-FCST=010,010,010/015,015,010
- KFCST=3223 4111 1112 3111 27DAY-AP=005,014 27DAY-KP=1112 2121 1254 2232
- WARNINGS=
- ALERTS=
- !!END-DATA!!
-
- NOTE: The Effective Sunspot Number for 22 MAR 94 was 32.6.
- The Full Kp Indices for 22 MAR 94 are: 4+ 3- 2- 3- 5o 3- 3- 3-
- The 3-Hr Ap Indices for 22 MAR 94 are: 34 12 7 12 46 12 12 12
- Greater than 2 MeV Electron Fluence for 23 MAR is: 2.7E+08
-
-
- SYNOPSIS OF ACTIVITY
- --------------------
-
- Solar activity was very low. Only a few small flares were
- observed during the day. Region 7692 (N18W32) showed some
- development and Region 7693 (N08W70) was decaying. There were
- indications of some small erupting flux regions near day's end
- at N08E62 and at S10E45.
-
- Solar activity forecast: solar activity is expected to be
- very low to low.
-
- The geomagnetic field ranged from quiet to active levels
- with some brief minor storm periods at high latitudes.
- The higher levels of activity were limited to the 0300-
- 1500Z time window.
-
- Geophysical activity forecast: the geomagnetic field is
- expected to be predominantly unsettled for the next three days.
-
- Event probabilities 24 mar-26 mar
-
- Class M 01/01/01
- Class X 01/01/01
- Proton 01/01/01
- PCAF Green
-
- Geomagnetic activity probabilities 24 mar-26 mar
-
- A. Middle Latitudes
- Active 25/10/10
- Minor Storm 10/05/05
- Major-Severe Storm 05/01/01
-
- B. High Latitudes
- Active 25/10/10
- Minor Storm 10/05/05
- Major-Severe Storm 05/01/01
-
- Near-normal HF propagation conditions dominated over most
- regions today. High latitude regions (transauroral paths)
- experienced some minor signal degradation during the night, but
- were otherwise near-normal. Similar conditions are expected
- over the next 72 hours. Near-normal propagation should
- dominate.
-
-
- COPIES OF JOINT USAF/NOAA SESC SOLAR GEOPHYSICAL REPORTS
- ========================================================
-
- REGIONS WITH SUNSPOTS. LOCATIONS VALID AT 23/2400Z MARCH
- --------------------------------------------------------
- NMBR LOCATION LO AREA Z LL NN MAG TYPE
- 7692 N18W32 159 0030 CSO 04 004 BETA
- 7693 N08W70 197 0060 CRO 07 008 BETA
- REGIONS DUE TO RETURN 24 MARCH TO 26 MARCH
- NMBR LAT LO
- 7686 N08 037
- 7684 S08 007
-
-
- LISTING OF SOLAR ENERGETIC EVENTS FOR 23 MARCH, 1994
- ----------------------------------------------------
- BEGIN MAX END RGN LOC XRAY OP 245MHZ 10CM SWEEP
- NONE
-
-
- POSSIBLE CORONAL MASS EJECTION EVENTS FOR 23 MARCH, 1994
- --------------------------------------------------------
- BEGIN MAX END LOCATION TYPE SIZE DUR II IV
- 23/ 1952 2038 2119 LDE B3.9 87
-
-
- INFERRED CORONAL HOLES. LOCATIONS VALID AT 23/2400Z
- ---------------------------------------------------
- ISOLATED HOLES AND POLAR EXTENSIONS
- EAST SOUTH WEST NORTH CAR TYPE POL AREA OBSN
- NO DATA AVAILABLE FOR ANALYSIS
-
-
- SUMMARY OF FLARE EVENTS FOR THE PREVIOUS UTC DAY
- ------------------------------------------------
-
- Date Begin Max End Xray Op Region Locn 2695 MHz 8800 MHz 15.4 GHz
- ------ ---- ---- ---- ---- -- ------ ------ --------- --------- ---------
- 22 Mar: 0620 0643 0700 B3.0
- 1617 1624 1634 B1.7
- 1658 1709 1721 B2.2
-
-
- REGION FLARE STATISTICS FOR THE PREVIOUS UTC DAY
- ------------------------------------------------
-
- C M X S 1 2 3 4 Total (%)
- -- -- -- -- -- -- -- -- --- ------
- Uncorrellated: 0 0 0 0 0 0 0 0 003 (100.0)
-
- Total Events: 003 optical and x-ray.
-
-
- EVENTS WITH SWEEPS AND/OR OPTICAL PHENOMENA FOR THE LAST UTC DAY
- ----------------------------------------------------------------
-
- Date Begin Max End Xray Op Region Locn Sweeps/Optical Observations
- ------ ---- ---- ---- ---- -- ------ ------ ---------------------------
- NO EVENTS OBSERVED.
-
- NOTES:
- All times are in Universal Time (UT). Characters preceding begin, max,
- and end times are defined as: B = Before, U = Uncertain, A = After.
- All times associated with x-ray flares (ex. flares which produce
- associated x-ray bursts) refer to the begin, max, and end times of the
- x-rays. Flares which are not associated with x-ray signatures use the
- optical observations to determine the begin, max, and end times.
-
- Acronyms used to identify sweeps and optical phenomena include:
-
- II = Type II Sweep Frequency Event
- III = Type III Sweep
- IV = Type IV Sweep
- V = Type V Sweep
- Continuum = Continuum Radio Event
- Loop = Loop Prominence System,
- Spray = Limb Spray,
- Surge = Bright Limb Surge,
- EPL = Eruptive Prominence on the Limb.
-
-
- ** End of Daily Report **
-
- ------------------------------
-
- Date: 24 Mar 1994 16:02:23 GMT
- From: ihnp4.ucsd.edu!swrinde!sgiblab!wrdis02.robins.af.mil!lakeith@network.ucsd.edu
- Subject: Equipment Users Groups??
- To: info-hams@ucsd.edu
-
- [ Article crossposted from rec.radio.amateur.equipment ]
- [ Author was CONTRACTOR Larry Keith;653 CCSG/SCT ]
- [ Posted on 24 Mar 1994 16:00:42 GMT ]
-
- I need some help to complete a magazine article that I am writing
- about buying used ham gear.
-
- Basically, I need names/addresses/phone numbers/internet address (if
- applicable) of users groups for specific brands or types of equipment.
- For instance, I know that there is a Collins user group that conducts
- a weekly net and publishes a newsletter, I think. But, I don't know
- about Ten-Tec, Icom, Kenwood, Heath, etc..
-
- replies to lakeith@wrdis01.robins.af.mil would be appreciated..
-
- Thanks and 73,
-
- Larry, KQ4BY
-
- ------------------------------
-
- Date: 24 Mar 1994 07:53:57 GMT
- From: ihnp4.ucsd.edu!swrinde!gatech!newsxfer.itd.umich.edu!newsrelay.iastate.edu!news.iastate.edu!jdwhite@network.ucsd.edu
- Subject: FT-5200: Deaf in Aircraft Band (118-136MHz)?
- To: info-hams@ucsd.edu
-
- I was wondering if other 5200 owners could receive Air band transmissions.
- I'm not even sure if the radio will switch to an AM receive mode in those
- bands. I have performed the extended TX mod.
-
- --
- Jason D. White Durham Center Operations Staff
- jdwhite@iastate.edu Repeater Chairman, Cyclone Amateur Radio Club
- Iowa State University Packet: n0rwu @ ki0q.#cia.ia.usa.na
- Ames, Iowa
-
- ------------------------------
-
- Date: 24 Mar 1994 07:56:38 GMT
- From: ihnp4.ucsd.edu!agate!howland.reston.ans.net!gatech!newsxfer.itd.umich.edu!newsrelay.iastate.edu!news.iastate.edu!jdwhite@network.ucsd.edu
- Subject: FT-5200: Interesting changes after mod
- To: info-hams@ucsd.edu
-
- After I modified my 5200 for extended TX, I noticed that I could no longer
- do the automatic repeater offset function. Has anyone else had this problem?
-
- --
- Jason D. White Durham Center Operations Staff
- jdwhite@iastate.edu Repeater Chairman, Cyclone Amateur Radio Club
- Iowa State University Packet: n0rwu @ ki0q.#cia.ia.usa.na
- Ames, Iowa
-
- ------------------------------
-
- Date: 24 Mar 1994 15:59:34 GMT
- From: pa.dec.com!nntpd.lkg.dec.com!n1bwt.enet.dec.com!wade@decwrl.dec.com
- Subject: Grid Squares & Lat/Long
- To: info-hams@ucsd.edu
-
- -Article 56577 of rec.radio.amateur.misc:
- -Newsgroups: rec.radio.amateur.misc
- -Subject: Grid Squares & Lat/Long
- -From: JAY@medicine.dmed.iupui.edu (Jay Sissom)
- -
- -Hello!
- -
- -I recently borrowed a GPS device to calculate my Latitude & Longitude. I
- -found a couple of basic programs on Compuserve to calculate my grid square
- -from this info. Either something is wrong with the program, or something is
- -wrong with the ARRL map in one of their books. Here is my lat/long:
- -
- -Lattitude: 39' 39.303 N
- -Longatude: 89' 10.550 W
- -
- -When I feed these numbers into the programs, I get EM59JP. When I look on the
- -map, EM59 is in Illinois and I live in Indianapolis, IN. Is the map wrong, or
- -is the basic program wrong?
- -
- -Thanks
- -Jay
- -KA9OKT
-
- the program is giving you the right answer for the longitude and
- latitude given. grid squares are based on whole degrees of
- longitude and latitude, not arbitrary political boundaries.
-
- paul N1BWT
-
- ------------------------------
-
- Date: Thu, 24 Mar 94 09:45:30 -0500
- From: ihnp4.ucsd.edu!usc!howland.reston.ans.net!noc.near.net!news.delphi.com!usenet@network.ucsd.edu
- Subject: Is 10M Dead?!
- To: info-hams@ucsd.edu
-
- ? I'm from Lancaster, Ohio; near
- the big city of Columbus, and run 10-meter mobile in my Jeep with an HTX-100.
- For some reason, there doesn't seem to be much activity at all across the band.
- Are we in the low part of the cycle? Or are gremlins inside my radio?
-
- - Steven Stultz
- KA8QGN
- sqstultz@delphi.com
- EMAIL or NEWSNET POST
-
- ------------------------------
-
- Date: 24 Mar 94 18:04:22 GMT
- From: news-mail-gateway@ucsd.edu
- Subject: Kenwood (TS-850) Computer Interface Info Wanted
- To: info-hams@ucsd.edu
-
- Text item: Text_1
-
- >A friend is interested in getting details about the computer interface
- >"box" used with the Kenwood TS-850. Has anybody built one...?
- > -Thanx -Adam (N2DHH)
-
- Hi Adam and anybody else...
-
- I have an ICOM-725 which has a single-line bi-directional TTL-level
- wired-OR serial asynchronous interface for external control. Is the
- Kenwood TS-850 the same hardware interface characteristic as the
- ICOM-725?
-
- thanks and 73, Cecil, KG7BK (I do not speak for Intel on Internet)
-
- ------------------------------
-
- Date: 24 Mar 94 15:25:45 GMT
- From: ihnp4.ucsd.edu!usc!howland.reston.ans.net!vixen.cso.uiuc.edu!aries!hawley@network.ucsd.edu
- Subject: Kenwood (TS-850) Computer Interface Info Wanted
- To: info-hams@ucsd.edu
-
- adam@panix.com (Adam Epstein) writes:
-
-
- > A friend is interested in getting details about the computer
- >interface "box" used with the Kenwood TS-850. Has anybody built one
- >for themselves (rather than buying Kenwood's)? Does anybody have
- >schematics? I'm sure that recommendations of commercially available
- >software and other hints and kinks would be appreciated as well.
- >Email to me (adam@panix.com) and I'll forward your replies.
-
- > -Thanx
- > -Adam (N2DHH)
- The box is just opto isolators on the signal lines driven by and driving
- ttl to line driver level converters (5v to +/-10v). Look thru QST for an
- article.....it'll probably cost about the same if you do it right.
- Chuck Hawley KE9UW.
-
- ------------------------------
-
- Date: 24 Mar 94 18:19:16 GMT
- From: news-mail-gateway@ucsd.edu
- Subject: Modifications to the Kenwood TH741???
- To: info-hams@ucsd.edu
-
- If this is the wrong use of this dl, please forgive me. I have documentation
- showing some mods to the Kenwood TH741. The documentation is incomplete. Can
- anyone tell me where to access a complete package of the mods. Thanks in
- advance.
- N6AES
-
- ------------------------------
-
- Date: 24 Mar 1994 07:31:12 GMT
- From: ihnp4.ucsd.edu!usc!howland.reston.ans.net!vixen.cso.uiuc.edu!newsrelay.iastate.edu!news.iastate.edu!jdwhite@network.ucsd.edu
- Subject: Need info on Icom (delta)1A HT
- To: info-hams@ucsd.edu
-
- I am considering purchasing this tri-band HT and was wondering what kind of
- experiences people have had with it. I'm very curious as to how far out of
- band it will receive on the three bands and also in any mods there are for it.
-
- Thanks, in advance, for any information you can provide.
-
- -Jason
-
-
- --
- Jason D. White Durham Center Operations Staff
- jdwhite@iastate.edu Repeater Chairman, Cyclone Amateur Radio Club
- Iowa State University Packet: n0rwu @ ki0q.#cia.ia.usa.na
- Ames, Iowa
-
- ------------------------------
-
- Date: 24 Mar 94 14:23:01 GMT
- From: news-mail-gateway@ucsd.edu
- Subject: RF and AF speech processors.
- To: info-hams@ucsd.edu
-
- Ignacy Misztal (ignacy@ux2.cso.uiuc.edu) wrote:
- >
- >: I am wondering why the QST reviews do not mention the type of processing,
- >: which has a large effect on signal quality. Signals with audio processing
- >: have higher content of AF harmonics, and are subsequently less efficient
- >
- >I don't understand why audio processing has to result in more audio
- >harmonics. Aren't there digital signal processing algorithms that
- >could prevent this effect? Even before DSP, didn't people use split
- >band audio processing to reduce the content of harmonics?
-
- You can use DSP; it is not that hard to write the appropriate
- software that will perform a passable attempt at processing,
- but the really tricky thing [read: needs lots of instructions and
- a well-specified DSP system] is to get a consistent group-delay
- characteristic across the audio passband.
- Without consistent group delay, the phase relationship between the
- input and output of the filter is frequency-dependent, which sounds
- horrible [like someone talking in a tunnel?] and will also cause some
- strange effects when used for data-modes that depend on consistent group
- delay characteristics.
-
- Its also necessary to maintain consistent amplitude response
- across the audio spectrum; if you fail to do this, then for a given
- level of processed signal at the output, some input frequencies will
- have been more heavily processed than others. Ideally, you need
- some form of frequency equalisation before the processor, which
- has to be tailored to suit the particular users voice, and the
- response characteristics of the microphone in use.
- --------------------------------------------------------------------------
- Peter J.M. Lucas NERC Computer Services Swindon England
- pjml@swmis.nsw.ac.uk or pjml@uk.ac.nsw.swmis or g6wbj@gb7sdn.gbr.eu
- "Licensed for highway operation at speeds not in excess of 130MPH"
- --------------------------------------------------------------------------
-
- ------------------------------
-
- Date: 24 Mar 1994 00:48:54 -0500
- From: ihnp4.ucsd.edu!usc!howland.reston.ans.net!news.intercon.com!news1.digex.net!access3!bote@network.ucsd.edu
- Subject: Voice mail on a repeater?
- To: info-hams@ucsd.edu
-
- wkinning@nyx10.cs.du.edu (Warren Kinninger) writes:
- >Here is a DTMF Tone Generator for the Sound Blaster written in Pascal.
- >Jim is working on a repeater controller based around a PC/XT system with
- >advanced features like voice mail and macro programming via 1200 baud ASCII.
-
- I have only heard voice mailboxes on the ACC garbage.
- I know that other repeater controllers have voice mailboxes.
-
- How does voice mail on a ham repeater perform? I am curious
- about actual users' experiences.
-
- If each member has an assigned voice mailbox, then that
- might be useful, but it would definitely drive up the volume
- of traffic on the repeater as people check in
- for messages. Even if the repeater announces that
- messages are waiting, that increase in noise itself
- could become annoying after a while.
-
- On the other hand, I have begged for certain stations
- to reach their destinations or change frequencies
- while they incessantly called over and over and
- over again for someone to no avail.
-
- Is voice mail something that many hams want on their
- favorite repeater?
-
- Comments welcome.
-
- --
-
- rec.nude: your exit to good living along the Information Toll Road.
- finger bote@access.digex.net for PGP key and an operator will help you.
- Only 10 days until Opening Day! How 'bout them Os!!
-
- ------------------------------
-
- Date: Thu, 24 Mar 1994 04:48:44 GMT
- From: ihnp4.ucsd.edu!usc!howland.reston.ans.net!europa.eng.gtefsd.com!news.umbc.edu!eff!news.kei.com!ub!csn!col.hp.com!srgenprp!news.dtc.hp.com!hplextra!rigel!pooley@network.ucsd.edu
- Subject: Yaesu ft530 question
- To: info-hams@ucsd.edu
-
- The FT-530 does not cover the 800MHZ band with the jumper 13 mod.
- It didn't on mine anyway.
-
- fyi,
-
- Chuck
- WA6JAM
-
- ------------------------------
-
- Date: 24 Mar 1994 15:18:00 GMT
- From: ihnp4.ucsd.edu!agate!howland.reston.ans.net!vixen.cso.uiuc.edu!ux2.cso.uiuc.edu!ignacy@network.ucsd.edu
- To: info-hams@ucsd.edu
-
- References <2ml9q1$25h@hplvec.lvld.hp.com>, <2mn2rd$ol0@vixen.cso.uiuc.edu>, <1994Mar23.162557.7558@arrl.org>
- Subject : Re: RF and AF speech processors. Was: FT-990 vs TS-850
-
- >I don't understand why audio processing has to result in more audio
- >harmonics. Aren't there digital signal processing algorithms that
- >could prevent this effect? Even before DSP, didn't people use split
- >band audio processing to reduce the content of harmonics?
- >>--
- >Zack Lau KH6CP/1 2 way QRP WAS
- > 8 States on 10 GHz
- >Internet: zlau@arrl.org 10 grids on 2304 MHz
-
- Cheap AF processors use AF clippers. DSP-based processors are not only
- novelties now, but they are more xepnsive to built than RF processors.
- Why AF clippers are worse than RF (IF) clippers? Consider a 500Hz
- tone test. With AF processor you will get extra 1000,1500,2000,2500
- Hz tones. With RF (SSB and DSB) processor 500Hz will be the only
- output. Please note that some older rigs have "implicit" RF
- processors. For instance, SWAN 500 has 7360, a beam deflection tube,
- as a DSB modulator. By clipping peaks, it acts with the following XTAL
- filter as a DSP processor.
-
- --------------------------------------------------------------------------
- Ignacy Misztal Ham radio: NO9E, SP8FWB
- Internet: ignacy@uiuc.edu Bitnet: ignacy@uiucvmd.bitnet
- University Of Illinois 1207 W. Gregory Dr., Urbana, IL 61801, USA
-
- ------------------------------
-
- End of Info-Hams Digest V94 #325
- ******************************
-