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Date: Fri, 13 May 94 16:01:25 PDT 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 #522 To: Info-Hams Info-Hams Digest Fri, 13 May 94 Volume 94 : Issue 522 Today's Topics: Amateur Radio and Civil Rights A new type of ham radio club / station .... ARLB043 2300 MHz comments sought Daily Summary of Solar Geophysical Activity for 12 May Looking for 71A (antique tube) data sheet nude amateur radio nets sacred frequencies UHF Wideband HT's -any ideas? Will Yaesu MH-18A2B work with HTX-202 World-Chip (7910) info needed 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: 12 May 94 14:23:04 From: ihnp4.ucsd.edu!sdd.hp.com!cs.utexas.edu!howland.reston.ans.net!gatech!newsxfer.itd.umich.edu!jobone!lynx.unm.edu!dns1.NMSU.Edu!opus!ataylor@network.ucsd.edu Subject: Amateur Radio and Civil Rights To: info-hams@ucsd.edu <In article <1994May10.085514.2324@hnrc.tufts.edu> jerry@hnrc.tufts.edu (Jerry Dallal) writes: <In article <gradyCpJnwy.Buu@netcom.com>, grady@netcom.com (Grady Ward) writes: <> I already own my assault radios: Icom-735 with 100khz-30Mhz xmit mod <> and several Icom-W2A's with extended xmit mods for VHF and UHF. <> <> And if that weren't enough, I own a Pro2006 with a clipped diode... <> <> Too bad these are now illegal radios as of April 26th -- the date <> of the assault radio ban. <These are *NOT* illegal radios. No? Great! I'll just stroll out and buy one...please tell me where, in the US, I can buy a *new* radio of the type described above, with the rx/tx tuning capability described. <The only thing that's illegal is tuning in to <some of the frequencies these radios are capable of receiving. Uh huh... ------------------------------ Date: Wed, 11 May 1994 11:35:08 -0400 From: ihnp4.ucsd.edu!dog.ee.lbl.gov!agate!howland.reston.ans.net!math.ohio-state.edu!news.acns.nwu.edu!ftpbox!mothost!lmpsbbs!NewsWatcher!user@network.ucsd.edu Subject: A new type of ham radio club / station .... To: info-hams@ucsd.edu Just for fun I thought we should do a side-by-side to the ARRL operation: In article <znr768510744k@indirect>, nu7i@nowhere (Darrell Shandrow) wrote: > > In article <1994May9.174007.28632@rsg1.er.usgs.gov> bodoh@dgg.cr.usgs.gov > writes: > > > > In article <2qg1o5$j18@Mercury.mcs.com>, svb@MCS.COM (Stephan Bechtolsheim) > > writes: > > |> - maximum of around 10 members. How about 250K- 300K > > |> - $50 to $75 / month membership. With 10 members that > > |> amounts to a 'club income' of $6000 - $9000 a year. At $12 per (assume lots of old life members), that's $3 million minimum > > |> - Nice and heafty sign up fee of, let's say, $300. No penalty from ARRL for first time signup > > |> - Buy / rent some room somewhere. Nice facilities in Newington, bought & maintained out of the above dues > > |> - Every member would have a key to that room. > > |> - This room would be filled with state-of-the-art > > |> equipment: > > |> 1. REAL good and big antennas (theory: if the last > > |> storm didn't blow them down, they were not high > > |> enough). Like how about a 120 foot tower. Why only one tower, W1AW has several. However, if towers blow down, they are no longer useful to support antennas, but the price is not reduced in any proportional fashion. > > |> 2. Nice low band rig with all the goodies, like > > |> amplifier, filters, RTTY, AMTOR, ... > > Sounds like a bunch of elitists to me. This is not within the spirit of > amateur radio at all. It's no worse than many repeater clubs whose members don't participate in HF contests, moonbounce, etc. ARRL does not discriminate between these groups, it encourages activities that benefit amateur radio. > I'd say that such a club should be frowned upon by the amateur community > and not given any undeserved respect. 73 I see no reason to frown, just consider it another special interest group spending their own private funds to enjoy their hobby. ARRL members are in the same position, and look at the respect accorded that organization. > > Darrell Shandrow at Arizona State University > Mentor: Internet Direct Mentorship Program! > Member: National Federation of the Blind > (The complete information access agenda - You print it you braille it too!) > -- > Darrell Shandrow at Arizona State University > Mentor: Internet Direct Mentorship Program! > Member: National Federation of the Blind > (The complete information access agenda - You print it you braille it too!) (No, I'm not a member, but I almost talked me into it!!) -- Karl Beckman, P.E. < The difference between genius and stupidity > Motorola Comm - Fixed Data < is that genius has its limits. -Unknown > The statements and opinions expressed here are not those of Motorola Inc. Amateur radio WA8NVW @ K8MR.NEOH.USA.NA NavyMARS VBH @ NOGBN.NOASI ------------------------------ Date: Thu, 12 May 1994 10:38:53 MDT From: ihnp4.ucsd.edu!dog.ee.lbl.gov!agate!library.ucla.edu!psgrain!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@network.ucsd.edu Subject: ARLB043 2300 MHz comments sought To: info-hams@ucsd.edu SB QST @ ARL $ARLB043 ARLB043 2300 MHz comments sought ZCZC AG08 QST de W1AW ARRL Bulletin 43 ARLB043 >From ARRL Headquarters Newington CT May 11, 1994 To all radio amateurs SB QST ARL ARLB043 ARLB043 2300 MHz comments sought 2300 MHz comments sought The FCC has issued a Notice of Inquiry on reallocation of spectrum from federal government use (in ET Docket 94-32). 50 MHz of spectrum would be transferred to private sector use, possibly as early as this summer. The comment deadline is June 15, 1994. The reallocation is called for under the Omnibus Reconciliation Act of 1993, which requires the Department of Commerce to identify 200 MHz of spectrum below 5 GHz to be reallocated within the next 15 years. The spectrum identified for immediate reallocation is at 2390 to 2400 MHz, 2402 to 2417 MHz, and 4660 to 4685 MHz. Amateurs share the first two ranges. The Commission said that ''there are a number of factors associated with existing allocations of the bands that will affect their potential for private sector use.'' The FCC specifically asked for input on whether the proposed reallocations would adversely affect amateur operations, especially amateur satellites. The Commission said that ''The Department of Commerce expects that the amateur service community can satisfy the majority of its spectrum requirements in the remaining 35 MHz (left after the proposed reallocation). It also believes that current use of the 13 cm band by amateur stations is light compared to use of bands lower in the spectrum, but notes that use may increase for amateur-satellite, high-speed computer data links, amateur TV, and other wide-band applications. ''The Department of Commerce states that it excluded the 2400-2402 MHz band from consideration for reallocation in order to protect existing amateur satellite operations.'' NNNN /EX ------------------------------ Date: Thu, 12 May 1994 22:42:45 MDT From: ihnp4.ucsd.edu!dog.ee.lbl.gov!agate!library.ucla.edu!psgrain!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@network.ucsd.edu Subject: Daily Summary of Solar Geophysical Activity for 12 May To: info-hams@ucsd.edu /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY 12 MAY, 1994 /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ (Based In-Part On SESC Observational Data) SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 12 MAY, 1994 ------------------------------------------------------- NOTE: Electrons at greater than 2 MeV continued at high to very high levels. !!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 132, 05/12/94 10.7 FLUX=087.4 90-AVG=087 SSN=045 BKI=3332 1213 BAI=010 BGND-XRAY=A9.4 FLU1=1.2E+06 FLU10=1.2E+04 PKI=3332 1223 PAI=010 BOU-DEV=027,026,022,014,006,010,006,028 DEV-AVG=017 NT SWF=00:000 XRAY-MAX= B9.7 @ 0525UT XRAY-MIN= A8.2 @ 0056UT XRAY-AVG= B1.3 NEUTN-MAX= +003% @ 0005UT NEUTN-MIN= -002% @ 0250UT NEUTN-AVG= +0.3% PCA-MAX= +0.1DB @ 2355UT PCA-MIN= -0.5DB @ 2245UT PCA-AVG= +0.0DB BOUTF-MAX=55345NT @ 0001UT BOUTF-MIN=55305NT @ 1639UT BOUTF-AVG=55322NT GOES7-MAX=P:+000NT@ 0000UT GOES7-MIN=N:+000NT@ 0000UT G7-AVG=+077,+000,+000 GOES6-MAX=P:+129NT@ 1908UT GOES6-MIN=N:-093NT@ 0219UT G6-AVG=+098,+032,-042 FLUXFCST=STD:090,090,095;SESC:090,090,095 BAI/PAI-FCST=010,025,020/012,025,020 KFCST=2213 3112 3324 3222 27DAY-AP=016,029 27DAY-KP=4333 3334 3652 3354 WARNINGS=*GSTRM;*AURMIDWCH ALERTS= !!END-DATA!! NOTE: The Effective Sunspot Number for 11 MAY 94 was 17.0. The Full Kp Indices for 11 MAY 94 are: 4+ 5- 4o 4o 3o 3+ 3o 4- The 3-Hr Ap Indices for 11 MAY 94 are: 31 38 27 27 15 17 15 23 Greater than 2 MeV Electron Fluence for 12 MAY is: 1.3E+09 SYNOPSIS OF ACTIVITY -------------------- Solar activity was very low, however, numerous activity was reported last period. A total of 16 B-class x-ray events were recorded, most of which were optically uncorrelated. The two largest, a B7 at 12/0409Z and a B9 at 12/0524Z were accompanied by strong discrete and sweep frequency radio bursts. Numerous moderate to strong sweep frequency emissions have been observed this entire period. Two weak to moderate B-class/SF flares were reported from Region 7722 (N07E81). This DHO beta spot group appears to have some delta characteristics, but is still rotating onto the disk. New Region 7723 (N10E30) emerged early this period as a BXO beta spot group but has grown in the last few hours to a DAO beta. Solar activity forecast: solar activity is expected to be very low to low. Both Regions 7722 and 7723 exhibits good potential for C-class activity. The geomagnetic field has been at quiet to active levels for the past 24 hours. The GT 2 MeV electron flux levels have decreased to the high range. Geophysical activity forecast: the geomagnetic field is expected to be mostly quiet to unsettled on day one of the forecast period. On day's two and three, geomagnetic activity is expected to increase to mostly unsettled to active with some minor storm periods. This is in response to a favorably positioned coronal hole. Event probabilities 13 may-15 may Class M 05/10/15 Class X 01/01/01 Proton 01/01/01 PCAF Green Geomagnetic activity probabilities 13 may-15 may A. Middle Latitudes Active 20/30/25 Minor Storm 05/25/20 Major-Severe Storm 01/05/05 B. High Latitudes Active 25/30/30 Minor Storm 10/30/25 Major-Severe Storm 01/10/05 HF propagation conditions improved over the last 24 hours as levels of geomagnetic activity subsided to quieter levels. High and polar latitude paths have observed improvements to near-normal values, at times. Middle and low latitude paths are observing normal propagation. Propagation is expected to remain near-normal over all regions on 13 May and then may again take a dip toward slightly degraded values (particularly for high and polar latitude paths) as the next disturbance degrades signal qualities. This anticipated disturbance should only last a few days before conditions begin returning back to near-normal levels. COPIES OF JOINT USAF/NOAA SESC SOLAR GEOPHYSICAL REPORTS ======================================================== REGIONS WITH SUNSPOTS. LOCATIONS VALID AT 12/2400Z MAY ------------------------------------------------------ NMBR LOCATION LO AREA Z LL NN MAG TYPE 7721 S12E42 144 0000 AXX 01 001 ALPHA 7722 N07E65 121 0320 DKO 05 005 BETA 7723 N10E28 158 0030 CAO 04 009 BETA 7714 S14W97 283 PLAGE 7718 N10W51 237 PLAGE 7719 S07W43 229 PLAGE 7720 S10W14 200 PLAGE REGIONS DUE TO RETURN 13 MAY TO 15 MAY NMBR LAT LO 7707 N00 078 7705 N03 091 LISTING OF SOLAR ENERGETIC EVENTS FOR 12 MAY, 1994 -------------------------------------------------- BEGIN MAX END RGN LOC XRAY OP 245MHZ 10CM SWEEP 0405 0409 0411 B7.6 3400 40 0522 0524 0526 B9.7 460 0752 0755 0757 B2.4 110 1450 1453 1455 B2.1 180 POSSIBLE CORONAL MASS EJECTION EVENTS FOR 12 MAY, 1994 ------------------------------------------------------ BEGIN MAX END LOCATION TYPE SIZE DUR II IV NO EVENTS OBSERVED INFERRED CORONAL HOLES. LOCATIONS VALID AT 12/2400Z --------------------------------------------------- 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 ------ ---- ---- ---- ---- -- ------ ------ --------- --------- --------- 11 May: 1738 1752 1802 B3.4 1942 1947 1954 B1.0 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 0 002 (100.0) Total Events: 002 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: Fri, 13 May 1994 01:43:16 GMT From: ihnp4.ucsd.edu!news.acns.nwu.edu!math.ohio-state.edu!darwin.sura.net!nih-csl!postman@network.ucsd.edu Subject: Looking for 71A (antique tube) data sheet To: info-hams@ucsd.edu Does anyone have a data sheet for the 71A (or CX371A) vacuum tube? I am looking for much more that just the pinouts. Tube characterists and curves would be the best. This tube dates back to about 1930. Thanks. Andy Voice: (301) 496-4991 FAX: (301) 496-0630 (will accept high resolution FAX) -- ---------------------------------------------------------------------------- Andrew Mitz, Biomedical Eng., Nationl Institutes | Opinions are mine alone of Health Animal Center, Poolesville, MD | arm@helix.nih.gov ---------------------------------------------------------------------------- ------------------------------ Date: Thu, 12 May 94 14:45:28 EDT From: newshub.sdsu.edu!nic-nac.CSU.net!usc!howland.reston.ans.net!europa.eng.gtefsd.com!news.msfc.nasa.gov!news.larc.nasa.gov!lerc.nasa.gov!kira.cc.uakron.edu!malgudi.oar.net@ihnp4.ucsd.edu Subject: nude amateur radio nets To: info-hams@ucsd.edu -----BEGIN PGP SIGNED MESSAGE----- jfw@ksr.com (John F. Woods) writes: > kludge@netcom.com (Scott Dorsey) writes: > >In article <1994May9.145745.26616@emba.uvm.edu> gdavis@griffin.emba.uvm.edu > <>What is wrong with you geeks? Haven't you ever wished to join the natives > >>of the Amazon rain forests? > <>What could be more natural? > >No way. Sure, it's wet enough for good grounding, but the treeline is > <too high to put up a decent antenna system. I think I'll stay nude right > >here, thank you very much. > > No, no, you climb one of the trees and put the mast for your vertical up > toward the top of one of them. The ARRL Antenna Book includes more details. > You should probably feed with low-loss openwire rather than coax, due to the > length (see Reflections, by Maxwell). Or, you can use jungle creepers to > build a hammock up in the canopy somewhere, for the ideal in operating comfor Nude ham radio creates hazards. One famous safety precautions when engaging in certain maintenance procedures is to keep one hand in your pocket.... -----BEGIN PGP SIGNATURE----- Version: 2.3a iQCVAgUBLdJ5psmzkeX3rfUNAQGvXQP+OIBqLbYtPFw5jwdVIH4/NvQ1EI+DT1jq fPRM41xnLifhlmHeJuTGj/9HR3NpA8Y3HBRZDJkfCSIIDbBuG7HRmnjFYClIxMU8 2AyvbrcLYTRTC4K9Tl9XazH/AwWIi9PKGXQP56j5OrcJPIaDn6wTfe3RVNOvw1Hm wZx4EatuSpA= =uwux -----END PGP SIGNATURE----- /--------------------------------------------------------------------------\ | Jim Grubs, W8GRT Voxbox Enterprises Tel.: 419/885-2814 | | jgrubs@voxbox.norden1.com 6817 Maplewood Ave. Fax/Data: 419/885-2905 | | Fido: 1:234/1.0 Sylvania, Ohio 43560 Home: 419/882-2697 | | AMATEUR RADIO - The National Park of the Mind | \-+------------------------------------------------------------------------/ ------------------------------ Date: Thu, 12 May 1994 12:30:59 GMT From: ihnp4.ucsd.edu!dog.ee.lbl.gov!agate!library.ucla.edu!csulb.edu!csus.edu!netcom.com!rogjd@network.ucsd.edu Subject: sacred frequencies To: info-hams@ucsd.edu Derek Wills (oo7@astro.as.utexas.edu) wrote: : rogjd@netcom.com (Roger Buffington) says: : >>Erich Franz Stocker (stocker@spsosun.gsfc.nasa.gov) wrote: : >>The most absurd statement I have heard is that a "dxer" has the : >>"right" to complain because someone may use the frequency : >>that nothing has been heard on for 5min or more. That : >>certainly isn't real friendly band sharing. : >You are exactly right. I couldn't agree with you more. : I disagree, within limits. There are standard DX frequencies : in the phone bands that are used by DXpeditions and individual : DX operators, such as 3795, 14195, 21295, 28495. These are : recognized worldwide as DX gathering places. If you know this, : and insist on starting a ragchew on 14195, I think it would be : unnecessarily provocative. : DX newsletters will often say "Expedition such-and-such will : operate on the standard DX frequencies", and they are small : enough in number and well-enough known by most hams that it : is courteous to avoid those for casual operating when possible. : Whether this is what the original poster is thinking of, I have : no idea, but outright condemnation of DXers for wanting to keep : one frequency per band clear for their sport is not warranted. : It's a little like claiming that it's OK to park right next to : a fire hydrant because there hasn't been a local fire for the : last 5 minutes. There is room for honest disagreement here, and I disagree with you thoroughly. Firstly, I've been an amateur since 1966, and I've never heard of the frequencies you reference in the context you mention. Not once. And I subscribe to CQ and QST. If I didn't know about it, how many of the many many newcomers who are upgrading to general class and above are gonna know it? Darned few, that's how many. The dx stations have VFOs on their rigs just like the rest of us. They can move a few Khz right or left. If someone else is using the frequency, then that's too bad. I've had a sked for years with a buddy on 14.0765. At a certain time, I sure wish the rest of you would stay off it. For some reason the rest of hamdom doesn't listen to my pleas and we often have to sidestep. :-) Sorry, but I think you are wrong on this one. : Derek "is this frequency in use CQ CQ CQ CQ" Wills (AA5BT, G3NMX) : Department of Astronomy, University of Texas, : Austin TX 78712. (512-471-1392) : oo7@astro.as.utexas.edu -- rogjd@netcom.com Glendale, CA AB6WR ------------------------------ Date: Wed, 11 May 1994 10:45:39 -0400 From: ihnp4.ucsd.edu!dog.ee.lbl.gov!agate!howland.reston.ans.net!math.ohio-state.edu!news.acns.nwu.edu!ftpbox!mothost!lmpsbbs!NewsWatcher!user@network.ucsd.edu Subject: UHF Wideband HT's -any ideas? To: info-hams@ucsd.edu In article <2qmb7m$cnj@agate.berkeley.edu>, kennish@kabuki.EECS.Berkeley.EDU (Ken A. Nishimura) wrote: > In article <2qm6pl$9j7@sbctri.sbc.com>, > Kenneth M. Gianino <gianino@sbctri.sbc.com> wrote: > >Is there a good, UHF only HT out there that can be modified to transmit and > >receive up to 470MHz? I don't mind retuning and losing the part or all of the > >70cm band. I've checked the mods servers and there seems to be very little > >interest in the UHF siblings of the current crop of 2m HT's. I'm not > >interested in dual band units. Anyone out there experienced with the Yaesu > >FT-73? I need an easily tunable unit for testing UHF GMRS repeaters and I am > >aware of the type acceptance problems if used on the air. I'm also aware of > >the type accepted units on the market that are very expensive and awkward to > >program. Any information would be appreciated. Thanks in advance. > >-Ken WB0QNA gianino@sbctri.sbc.com Ken, have you considered that, since there are only 8 GMRS repeater channels, anybody's (type-accepted for Part 95) 8 channel radio covers your repeater testing needs as well as those pesky legal requirements of the ever-meddling FCC? Once programmed, your test unit will be useful for a very long time. If you also want talk-around and simplex on the 5W ERP offsets, the maximum channel count required is 23 frequencies. If you are doing testing into a dummy load and you run the illegally modified and operated portable directly into the receiver through a decent RF attenuator, you won't have any external radiation to worry about. You also could use a simple RF signal generator and a frequency counter if the sig-gen is too simple and therefore unstable. Either way, your amateur and GMRS licenses will then not be in jeopardy. Of course, being a law (and FCC Rules) abiding amateur, you DO also hold a valid GMRS license or letter of authorization from the licensee for each and every one of those GMRS repeaters you access on the air, right?? I know that your employer (and mine) takes a VERY dim view of any FCC rules violations, particularly if they could be business-related. > > I don't know about the FT-73, but the Yaesu FT-41 with the appropriate > mods will transmit up to 470 Mhz. The mod itself is for MARS/CAP and > specified a 420-460 MHz range, but I have tested the unit to 470 MHz on > the analyzer here at work, and it seems to work. Variations in the VCO > from unit to unit may make it somewhat flaky out at 470 MHz. Very > small unit, low voltage amplifier. Not a lot of RF output with the > standard battery pack. It is interesting that Yaesu would publically distribute a "MARS/CAP" mod in the USA when they are fully aware that neither of those services are authorized to operate anywhere in the 420 MHz to 460 MHz frequency range. The official range for the military and Feds is 406-420 MHz, 420-450 MHz is us amateurs (except up here near the Canadian border), while the 450-460 range is under FCC jurisdiction and is used for land mobile Parts 20, 90, and 95 amongst others. > > Of course, I don't guarantee that your unit (if you choose to buy one > and mod it) will work to 470 MHz. Your mileage may vary. Oh, and you'll > have to get the mods from someone other than me -- I hate to be this > way, but since you have freely admitted that you would be doing something > illegal, I won't help you -- call me tighta**ed, but blame the trial > lawyers. > > Yes, type accepted units are hard to program. That is a requirement > of type acceptance -- make it hard for the user to go somewhere he/she > isn't supposed to go. > > -Ken It also ensures at least a minimum standard of equipment technical performance which amateur operators are not required (and most are not equipped) to maintain. This is a necessary condition in any channelized radio service. Let's try not to give the Amateur Radio Service another black eye by defying the FCC Rules! -- Karl Beckman, P.E. < The difference between genius and stupidity > Motorola Comm - Fixed Data < is that genius has its limits. -Unknown > The statements and opinions expressed here are not those of Motorola Inc. Amateur radio WA8NVW @ K8MR.NEOH.USA.NA NavyMARS VBH @ NOGBN.NOASI ------------------------------ Date: Thu, 12 May 1994 12:53:11 GMT From: ihnp4.ucsd.edu!dog.ee.lbl.gov!agate!howland.reston.ans.net!gatech!newsxfer.itd.umich.edu!jobone!ukma!rsg1.er.usgs.gov!junger@network.ucsd.edu Subject: Will Yaesu MH-18A2B work with HTX-202 To: info-hams@ucsd.edu In article <tblake.49.2DCFAAAB@stpaul.ncr.com>, <tblake@stpaul.ncr.com> wrote: >Hi Gang, > >I was debating whether or not to buy a speaker-microphone >for my RS HTX-202. A co-worker has a Yeasu MH-18A2B >speaker-microphone he does not want. Will the Yaesu >speaker-mic work with my HTX-202? > > I bought RS's speaker-mike that they recommend for the HTX-202. It seems to work fine, and I have had good audio reoprts using it. As a more specific reply to your question, the RS speaker-mike package/instructions has written on it in large letters: "Yaesu and Icom compatible", whatever that means. But remember that YMMV, etc. etc. 73's - John, W3GOI ------------------------------ Date: Thu, 12 May 1994 01:36:26 GMT From: ihnp4.ucsd.edu!dog.ee.lbl.gov!agate!howland.reston.ans.net!cs.utexas.edu!swrinde!emory!rsiatl!ke4zv!gary@network.ucsd.edu Subject: World-Chip (7910) info needed To: info-hams@ucsd.edu In article <01HC7LWENXPU8WXHRE@pitvax.xx.rmit.edu.au> DAVID@pitvax.xx.rmit.EDU.AU (David Taylor RMIT Bundoora) writes: > >I'm trying to assemble equipment to get started on this mode. I've come >across an old modem that has a 'AM7910DC WORLD-CHIP' in it. I've heard >that some TNC's use the 7910 chip, so am wondering if this is the same? Yes. >I will need circuit and pin strapping info for it as well - the original >modem offered 1200/75 operation only. Looking in the packet directories >of several ham archives (uscd, funet, buffalo) has yielded nothing on basic >1200b modems. I heard of a modem cct. in the 1992 ARRL handbook, does this >use a 7910? Yes. >While I'm asking questions... can anyone tell me if 1200b packet (Bell 202) >uses straight FSK and what the audio frequencies are? I can't find this >info anywhere :-( Typically, Bell 202 is used via AFSK over FM voice radios. Bell 103 is used at HF, either FSK or AFSK over a SSB radio (that amounts to the same thing with a good SSB rig). The Bell 202 tone frequencies are 1200 and 2200 Hz. Bell 103 has two sets of tones depending on whether it's in originate or answer mode. They are 1070 and 1270 for originate mode and 2025 and 2225 for answer mode. Typical HF operation is in originate loopback mode. AM7910 pinouts are as follows: Pin Signal 1 !Ring (tie high) 2 Vcc (+5 volts) 3 Reset (tie between a .033 uf cap to ground and a 1 meg resistor tied to 5 volts) 4 Vbb (-5 volts) 5 RC (this is receive carrier, feed receiver audio to it through a a 0.68 uf cap and bridge a 10 k resistor from the pin to ground.) 6-7 Join these two pins with a 2000 pf cap and 100 ohm resistor in series 8 TC (this is transmit carrier, feed to microphone input via 0.68 uf) 9 Ground 10 TD (transmit data TTL, feed through 1489 RS232 converter chip) 11 !BRTS (tie to +5 volts through a pullup resistor) 12 !RTS (request to send, feed through 1489) 13 !CTS (clear to send, feed from 1488 RS232 converter chip) 14 !BCTS Not used 15 BRD not used 16 !DTR ( Data Terminal Ready, feed through 1489) 17-21 MC0 thru MC4 mode programming pins. (see below) 22 Ground 23-24 Crystal/clock (connect with a 2.4576 MHz crystal and put a 22 pf cap from pin 23 to GND and a 15 pf cap from pin 24 to GND) 25 !CD (carrier detect, send to 1488) 26 RD (received data, send to 1488) 27 BCD Not used 28 BTD Not used Program modes MC4 MC3 MC2 MC1 MC0 Function 1 0 0 0 0 Bell 103 orignate loopback 1 0 0 0 1 Bell 103 answer loopback 1 0 0 1 0 Bell 202 main loopback 1 0 0 1 1 Bell 202 loopback (equalized) The mode you want for 1200 baud packet is 10010. A 1 is a pullup to 5 volts and a 0 is a ground. Gary -- Gary Coffman KE4ZV | You make it, | gatech!wa4mei!ke4zv!gary Destructive Testing Systems | we break it. | uunet!rsiatl!ke4zv!gary 534 Shannon Way | Guaranteed! | emory!kd4nc!ke4zv!gary Lawrenceville, GA 30244 | | ------------------------------ Date: Fri, 13 May 1994 13:12:56 GMT From: ihnp4.ucsd.edu!agate!library.ucla.edu!csulb.edu!csus.edu!netcom.com!kludge@network.ucsd.edu To: info-hams@ucsd.edu References <1994May9.145745.26616@emba.uvm.edu>, <kludgeCpJvEK.5Ap@netcom.com>, <2qtk96$e8h@hopscotch.ksr.com>0 Subject : Re: nude amateur radio nets In article <2qtk96$e8h@hopscotch.ksr.com> jfw@ksr.com (John F. Woods) writes: >kludge@netcom.com (Scott Dorsey) writes: >>In article <1994May9.145745.26616@emba.uvm.edu> gdavis@griffin.emba.uvm.edu (Gary Davis) writes: ><>What is wrong with you geeks? Haven't you ever wished to join the natives >>>of the Amazon rain forests? ><>What could be more natural? >>No way. Sure, it's wet enough for good grounding, but the treeline is ><too high to put up a decent antenna system. I think I'll stay nude right >>here, thank you very much. > >No, no, you climb one of the trees and put the mast for your vertical up >toward the top of one of them. The ARRL Antenna Book includes more details. >You should probably feed with low-loss openwire rather than coax, due to the >length (see Reflections, by Maxwell). Or, you can use jungle creepers to >build a hammock up in the canopy somewhere, for the ideal in operating comfort. Been there, done that. Verticals don't seem to work well in such a situation. Most of your signal is striking the wet trees around you. The only decent system I managed to get set up was a dipole stretched across a burned clearing. --scott (who still has a PRC-8 somewhere in the garage and will be using it on Field Day) -- "C'est un Nagra. C'est suisse, et tres, tres precis." ------------------------------ End of Info-Hams Digest V94 #522 ******************************