Date: Mon, 6 Dec 93 04:30:46 PST From: Ham-Homebrew Mailing List and Newsgroup Errors-To: Ham-Homebrew-Errors@UCSD.Edu Reply-To: Ham-Homebrew@UCSD.Edu Precedence: Bulk Subject: Ham-Homebrew Digest V93 #124 To: Ham-Homebrew Ham-Homebrew Digest Mon, 6 Dec 93 Volume 93 : Issue 124 Today's Topics: 2M 10w amp? Info Request. Amateur Radio <->PC Slow Scan TV on a C= Amiga computer. sw-radio coils...question W7EL's Optimized rig: saga continues 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 Ham-Homebrew Digest are available (by FTP only) from UCSD.Edu in directory "mailarchives/ham-homebrew". 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: Thu, 2 Dec 1993 06:03:52 GMT From: usc!math.ohio-state.edu!uwm.edu!msuinfo!harbinger.cc.monash.edu.au!bruce.cs.monash.edu.au!trlluna!titan!pcies4.trl.OZ.AU!drew@network.ucsd.edu Subject: 2M 10w amp? To: ham-homebrew@ucsd.edu In article blumb@sage.cc.purdue.edu (Bill Blum) writes: >From: blumb@sage.cc.purdue.edu (Bill Blum) >Subject: 2M 10w amp? >Date: Thu, 25 Nov 1993 11:50:38 GMT >Well, I have a choice. > >I can either shell out the $$ to buy a 2m amp for my HT, or I can buy a >theory book, learn theory, and build one. > >Recommendations either way? > >-- >Bill Blum N9VLS blumb@sage.cc.purdue.edu Purdue University, W. Lafayette, IN >Reality is for those who can't handle subscribing to IASFM and Model Railroader Bill, get a copy of Motorola's "RF Device Data Manual" Vols I and II. Includes many great Application Notes by Motorola Engineering staff. Kind Regards, Drew, VK3XU Telecom Australia Research Laboratories. ------------------------------ Date: Fri, 3 Dec 1993 19:26:19 GMT From: pipex!uknet!bradford.ac.uk!M.Leizaola@uunet.uu.net Subject: Info Request. Amateur Radio <->PC To: ham-homebrew@ucsd.edu A friend of mine has asked me to forward this messages. Please reply to him via e-mail. sert91sb@va.anglia.ac.uk ---------------------------------------------- could you please send me a rough design of the amateur radio and if possible how can I do the data transmission between two PCs using rhese amateur radios... siva ------------------------------ Date: Fri, 3 Dec 1993 16:11:15 GMT From: pravda.sdsc.edu!usc!howland.reston.ans.net!pipex!uknet!brunel!kmws-13.brunel.ac.uk!ed92mdw@network.ucsd.edu Subject: Slow Scan TV on a C= Amiga computer. To: ham-homebrew@ucsd.edu Well, my Dad has asked me if he can use my Amiga with it's new digitiser (Vidi-Amiga 12) to send Slow-Scan TV pictures over the airwaves. At the moment he's using my old Sinclair Spectrum, but the Amiga can produce nicer looking graphics and doesn't take five minutes to load the program and another couple of minutes to load a picture from tape. You can get Spectrum emulators for the Amiga, but there's no mic socket on the Amiga to use with the program! Anyway, any information on programs, any circuits etc.. appricated such exists - I don't know whether I'll fully understand it but I sure my Dad will. Thanks, - Matt. +---------------------------------+ "It's not fair to have the | Matthew Wilson, BA2 D&T with Ed.| same rules for everybody | Brunel University (Runnymede), | when we're all different." | Egham, Surrey, England. | +---------------------------------+ ------------------------------ Date: Sat, 4 Dec 1993 06:03:47 GMT From: mvb.saic.com!unogate!news.service.uci.edu!usc!howland.reston.ans.net!agate!iat.holonet.net!pubcon!brian.oakley@network.ucsd.edu Subject: sw-radio coils...question To: ham-homebrew@ucsd.edu i dont think the bar would achieve the same results as the toroid would in that much of the magnetic flux on a bar type core is outside the core itself, whereas the flux remains virtually all in the toriod type core. 73 wb5kxw ------------------------------ Date: 6 Dec 93 04:10:38 GMT From: ogicse!cs.uoregon.edu!sgiblab!spool.mu.edu!agate!iat.holonet.net!rohrwerk@network.ucsd.edu Subject: W7EL's Optimized rig: saga continues To: ham-homebrew@ucsd.edu rdewan@casbah.acns.nwu.edu (Rajiv Dewan) writes: >This is as a follow up on my earlier tale of woe in which I mentioned >the low VFO output. I thank all, including W7EL, who replied. >I replaced the receive section of W7EL's Optimized rig with Rick Campbell's >R1. For a test, I hooked up an antenna and the oscillator (thru the >buffer) to the SBL-1 mixer in the R1. The receiver seems quite >insensitive. Only signals S7 or better were audible on the receiver. It >is quite deaf. >Rajiv >aa9ch 1) You sure that's enough oscillator drive? 2) I'm suspicious of that series-pick-off approach to TR switching. I built up the 160 meter transverter from the 1988 ARRL Handbook, and was very dissatisfied with the loss. Now I don't need it because of the way I hooked it to the rig, but when I built up a little 40m transmitter, I used diode TR switching. John K0JD ------------------------------ End of Ham-Homebrew Digest V93 #124 ****************************** ******************************