From wang!elf.wang.com!ucsd.edu!info-hams-relay Fri Apr 19 14:48:23 1991 remote from tosspot Received: by tosspot (1.64/waf) via UUCP; Sat, 20 Apr 91 12:28:10 EST for lee Received: from somewhere by elf.wang.com id aa11749; Fri, 19 Apr 91 14:48:22 GMT Received: from ucsd.edu by relay1.UU.NET with SMTP (5.61/UUNET-shadow-mx) id AA01250; Fri, 19 Apr 91 09:52:55 -0400 Received: by ucsd.edu; id AA23500 sendmail 5.64/UCSD-2.1-sun Fri, 19 Apr 91 04:30:32 -0700 for nixbur!schroeder.pad Received: by ucsd.edu; id AA23496 sendmail 5.64/UCSD-2.1-sun Fri, 19 Apr 91 04:30:29 -0700 for /usr/lib/sendmail -oc -odb -oQ/var/spool/lqueue -oi -finfo-hams-relay info-hams-list Message-Id: <9104191130.AA23496@ucsd.edu> Date: Fri, 19 Apr 91 04:30:27 PDT From: Info-Hams Mailing List and Newsgroup Reply-To: Info-Hams@ucsd.edu Subject: Info-Hams Digest V91 #306 To: Info-Hams@ucsd.edu Info-Hams Digest Fri, 19 Apr 91 Volume 91 : Issue 306 Today's Topics: 50 to 75 ohm transformer??? Adjust frequency of4 terminal, rectanglular oscillators? AO-21 QUESTION Ban on Linears on Ten Meters High(?) Speed CW No-Code Testing - Who is to adm. Ten-Tec Where to get a part or two Send Replies or notes for publication to: Send subscription requests to: 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: 18 Apr 91 03:24:29 GMT From: hpl-opus!hpnmdla!alanb@hplabs.hpl.hp.com Subject: 50 to 75 ohm transformer??? To: info-hams@ucsd.edu In rec.radio.amateur.misc, joseph@panix.uucp (Joseph R. Skoler) writes: >I have at my disposal 3/4 inch hardline (about 2000 feet of it) and would >love to put it to good use. The problem is, it's 75 ohm stuff. Someone asked me by E-mail about connectors. When I tried to reply, it bounced. Oh well, others may be interested also. The problem with hardline connectors is they are hard to find, and even if you can find them you probably don't want to pay for them. The last time I looked they were around $30 each, and they are probably more now. One size of hardline (I think it is the 5/8") has a center conductor that fits nicely into the center contact of an S0-239 UHF female connector. The shield is about the same diameter as the SO-239 shell. This means you can plug a double-female ("barrel") connector onto the end of the cable, wrap a piece of thin aluminum sheet around the outside to connect the shield and clamp it down with a couple of hose clamps for strength. I then coated the whole thing in epoxy for watertightness. On the "shack" end of the coax, you don't have to worry about water tightness, so I just cut a hole in a minibox and ran the coax through the hole. I used a metal cable clamp to ground the shield and provide mechanical support. The matching network was in the box, connected to a SO-239 connector on the 50-ohm end. The other question was: "how do you adjust the antenna's gamma match for 75 ohms?" What I did was to temporarily connect a 150-ohm resistor in parallel with the feed point and tune for lowest SWR on a 50-ohm SWR meter. (150 ohms in parallel with 75 ohms = 50 ohms.) 73 AL N1AL ------------------------------ Date: 18 Apr 91 21:18:35 GMT From: ogicse!orstcs!@ucsd.edu Subject: Adjust frequency of4 terminal, rectanglular oscillators? To: info-hams@ucsd.edu I am making a small low power transmitter as an alarm system for my bicycle. It will have a small motion sensitive switch inside and will transmit when if the bike is moved. I would like to transmit audio picked up by a small mike, or at least I need to modulate the signal so I can hear it on my scanner. For space saving and cost reasons I would like to use one of those small can oscillators with 4 terminals. The only problem is how to modulate either the amplitude or the frequency of this device. I have noticed that varying supply voltage changes both the amplitude and frequency. Is this the best way? I don't have any spec sheets on these oscillators but I have determined V+, V-, and the output. The other pin seems to be no connection. ------------------------------ Date: 14 Apr 91 07:20:20 GMT From: kb2ear!overlf!n2aam@RUTGERS.EDU Subject: AO-21 QUESTION To: info-hams@ucsd.edu Does anyone in netland know what is the story with AO-21? When will the transponders be put on line? Any information would be appreciated. Dave Marthouse N2AAM Unix: n2aam@kb2ear.ampr.ORG Fido: dave marthouse 1:107/323 Packet: n2aam @ w2emu-4.nj.usa.na ------------------------------ Date: 17 Apr 91 14:56:44 GMT From: hpda!hpcupt1!holly@hplabs.hpl.hp.com Subject: Ban on Linears on Ten Meters To: info-hams@ucsd.edu I really don't think we are paying for the sins of the CB crowd. Just about any commercial linear can be quickly and easily converted to full operation on 10 meters. After you buy the amplifier send a copy of your license along with the warranty card and in the return mail comes the instructions and parts to modify the amplifier to operate on 10 meters. So you have to wait a week or two before you can use the amp on 10 meters, but 100 watts and a beam is a very commanding signal on 10 meters. Jim, WA6SDM holly@hpcupt1.cup.hp.com ------------------------------ Date: 18 Apr 91 19:10:29 GMT From: chiles.slisp.cs.cmu.edu!chiles@pt.cs.cmu.edu Subject: High(?) Speed CW To: info-hams@ucsd.edu I'd like some serious CW types to discuss their "breaking the barrier". I can just barely write 25 WPM, but this is stressful for QSOs and not fully reliable under poor conditions. Also, after copying a few minutes of that, I can barely use my forearm to drive my key. Do people consider 25-30 WPM high speed? Are these just the barrier speeds? Am I supposed to start head copying? I can hear 30 WPM, but I'm sort of incredulous about ever writing this speed. I know I can type well over 30 WPM, but I wonder how convenient that is? Is this the way I have to go, if not with head copying? Whatever I do now, do I have to take two steps backwards, so I can take 3-4 steps forward; that is, head copying and typing are going to take some time to preceduralize the neural net, and before that happens, the new method is just going to get in the way. So, what are the methods for breaking 30 WPM? I'm have a hard time head copying because I get lost after one or two words, and more than 4-5 character strings get me lost within a single word. I just can't remember what I've heard, but maybe I'm thinking too much. How do people do it, and how do you go about getting there? I hope someone can help, or at least provide me with inspiration by reporting your comfortable CW speed at or over 30 WPM and your method of copy. Thanks, Bill ------------------------------ Date: 18 Apr 91 14:00:48 GMT From: news-mail-gateway@ucsd.edu Subject: No-Code Testing - Who is to adm. To: info-hams@ucsd.edu Tim Wright recently (V91 #384) wrote: "I'm ready to test for the no-code tech but all the VE's I have contacted tell me that they aren't alloud to test the new no-code prospects. I have asked at least 15 different VE's in 75 mile radious of where I live. I'm confused.....Who is aloud to test the new no-code prospects." This is almost beyond belief! We have already held two sessions here in the Rochester, NY area (2/16 & 3/16) at which we tested 'no-code' technicians. The process is the same as before except no code test was administered. I'll not go into details concerning the paperwork, that is the contact VE's responsibility and should not concern the examinee. Your mail note gives me no clue of your location; if I knew what city you lived in or near I could possibly find the name of a contact VE in your area who knew what to do for testing new technician candidates. Send me a mail note with your phone number and address. I have a question, however. You stated that 'I've already filled out the envelope and I'm ready to send out the paper work.' What paperwork are you sending out and to whom? 73 and good luck. Lou Kohnen K2ANC W5YI VE#3182 Xerox Corporation 800 Phillips Rd. Bldg. 128-53E Webster, NY 14580 (716) 422-3899 ------------------------------ Date: 17 Apr 91 20:24:50 GMT From: hpfcso!hpfcdc!perry@hplabs.hpl.hp.com Subject: Ten-Tec To: info-hams@ucsd.edu > I saw in a recent issue of Signal Magazine (AFCEA) that Ten-Tec has > a GSA contract number and is selling to the US government. GOOD WORK > TEN-TEC! > > I also have reliable word that production was at max during Desert Storm > producing Paragons for MARS use. Maybe that's why the new rigs are so > behind schedule. Maybe now Ten-Tec can fold some of the profit back into R&D and create a radio that the rest of us can afford. I'm tired of being forced to buy overseas by their ridiculous $/feature ratio. Perry / KF0CA ------------------------------ Date: 17 Apr 91 22:06:28 GMT From: swrinde!zaphod.mps.ohio-state.edu!think.com!mintaka!bloom-beacon!eru!hagbard!sunic!mcsun!hp4nl!phigate!philica!geertj@ucsd.edu Subject: Where to get a part or two To: info-hams@ucsd.edu In article <3031@ksr.com> jfw@ksr.com (John F. Woods) writes: >Does anyone know where I could buy one or two of either the >Signetics NE-604 (the FM IF chip, not the famous 602 mixer) >or the Motorola MC-3362? As usual, the really interesting parts >aren't available from the usual small-quantify vendors (at least >none of those I have catalogs from). Note that I won't do this except for the fact that the guy mentioned below made a shop out of the frustration to obtain RF parts these days. If you can't find some, try Dolstra Electronics in Veenwoudsterwal, Holland. NE604N Dfl 24,50 MC3362 Dfl 19,50 He can be reached by FAX on +31 5110 3344. I don't have any connections with him. Maybe this helps someone. 73, Geert Jan PE1HZG ------------------------------ Date: 18 Apr 91 18:54:20 GMT From: deccrl!news.crl.dec.com!shlump.nac.dec.com!yacht.enet.dec.com!gettys@decwrl.dec.com To: info-hams@ucsd.edu References <1600@west.West.Sun.COM>, <22076@shlump.nac.dec.com>, <1614@west.West.Sun.COM>.d Reply-To : gettys@yacht.enet.dec.com (Bob Gettys) Subject : Re: The IC-W2A: A Floor Wax AND a Dessert Toping! In article <1614@west.West.Sun.COM>, flloyd@L1-A.West.Sun.COM (Fred Lloyd SUN Phoenix SE 602-275-5537 x17) writes: |>A friend of mine here has just received the out-of-band transmit mod |>and has installed it. It's the typical 3-legged surface mount diode |>soldering trick. ICOM fax'ed him the info in about a day. I'll post |>the procedure as soon as I get it from him. He had a couple of |>interesting things to say about it: |> |>The vhf and uhf sections are totally separated into nice little "packages" |>that are enclosed in metal. Each one has a molded connector and the |>tow pieces stack together inside. Very easy to disassemble. |> |>Once installed, the radio transmits from 390 to 470 MHz (don't know |>about 2M). Receive sensitivity still good in the low 400 range. |> |>I asked him about cross-band repeat and he said that he didn't know, |>that he had only received the mod for MARS/CAP. |> That is good news. However, the mods metioned here before for opening up the receive and the all digit entries also opens up the VHF portion for CAP/MARS (i.e. from 140 to 150Mhz!) with no internal mods needed. Along with the ability to set in an odd split freq to the 5khz level in the call channel (I still havent tried setting an odd split into a standard memory channel, it might work - but the call cahnnel makes note of this capability in the manual), it makes for a real simple unit to get onto MARS/CAP ------------------------------ Date: 19 Apr 91 04:22:29 GMT From: news-mail-gateway@ucsd.edu To: info-hams@ucsd.edu References Faunt, N6TQS, 415-688-8269) Subject : HT's - whats good, whats not? If I were money-constrained right now, but wanted a good dual-band HT, I'd buy a used IC24AT. There will be a number on the market at good prices, since the IC W2 is now out, and is even neater. The '24 is a very nice rig. 73, doug ------------------------------ End of Info-Hams Digest ******************************