Date: Mon, 27 Jun 94 04:30:35 PDT 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 V94 #175 To: Ham-Homebrew Ham-Homebrew Digest Mon, 27 Jun 94 Volume 94 : Issue 175 Today's Topics: 28Mhz PLL Source Wanted HELP: Audio problems in Yaesu FT727R HT Realistic (RS) scanner mods 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: 26 Jun 1994 21:57:40 GMT From: ihnp4.ucsd.edu!dog.ee.lbl.gov!agate!darkstar.UCSC.EDU!news.hal.COM!olivea!grapevine.lcs.mit.edu!chaos.dac.neu.edu!chaos.dac!dean@network.ucsd.edu Subject: 28Mhz PLL Source Wanted To: ham-homebrew@ucsd.edu Hi: Does anyone know of a PLL (part #, and source for it) that will work at 28Mhz? I am working on a Rx design, and I need a low cost part. Thanks! -Dean ------------------------------ Date: 26 Jun 1994 17:54:56 -0400 From: ihnp4.ucsd.edu!swrinde!howland.reston.ans.net!spool.mu.edu!bloom-beacon.mit.edu!ai-lab!bronze.lcs.mit.edu!not-for-mail@network.ucsd.edu Subject: HELP: Audio problems in Yaesu FT727R HT To: ham-homebrew@ucsd.edu I've a problem with a Yaesu FT727R HT I recently brought back to service. It has intermittently lost its audio. When I first turned it on after repairs, the radio made a brief motorboating sound, then the audio seems to cut out (radio CPU still works and the Busy light still indicates open squelch). There *is* audio when this happens, but it's *very* faint. There is a tone board (Yaesu's) installed, and it is also nonfunctional (radio just beeps when I try to invoke the encoder). The first time this happened, I was able to turn the radio off and on and normal audio would come back (tone board still didn't work). Now after several hours of this, the audio does *not* return. A month ago, I experienced these symptoms and replaced the audio output transistor, a 2SB772; a new transistor is in place now, but the problem persists. I have a thought that perhaps the fault is killing the transistor; I hope not. The tone card might be squelching the audio, since it supports tone decode as well as encode. This is an old HT, and has been under repair several times. I'm reaching the point of no return, but would really appreciate any advice on this, especially from 727 owners (_besides_ "Buy a new radio!" :)). Thanks and 73's, Dave, N1KGH -- | David Moisan, N1KGH /^\_/^\ moisan@silver.lcs.mit.edu | | 86 Essex St. Apt #204 ( o ^ o ) n1kgh@amsat.org | | Salem. MA 01970-5225 | | ce393@cleveland.freenet.edu | | | ------------------------------ Date: 26 Jun 94 22:05:42 CST From: ihnp4.ucsd.edu!agate!spool.mu.edu!news.clark.edu!netnews.nwnet.net!ns1.nodak.edu!news.uoknor.edu!news.ualr.edu!eivax.ualr.edu!heiss@network.ucsd.edu Subject: Realistic (RS) scanner mods To: ham-homebrew@ucsd.edu Hi ALL: I have a Realistic PRO-2023 programmable scanner. I would like to modify it for operation on 6, 10, 12, ... meters. I think 6 and 10 should be fairly easy since it's right on the edge, I'm not sure about the rest. Anyone recommendations would be appreciated. thanks-- ****************************************************************************** Larry Heiss University of Arkansas @ Little Rock Laser Applications Lab e-mail heiss@ualr.edu call: KC5CVL ****************************************************************************** ------------------------------ End of Ham-Homebrew Digest V94 #175 ******************************