I suffer with the inability to walk away from an electronics malfunction...can't sleep, can't think of anything else. Turns out that the 22 uFD electrolytic where the 12.8 V comes into the signaling unit had failed. I took it out and the thing worked for a few seconds. I measured the resistance of the in-series 10 ohm surface mount resistor preceeding the cap and it was reading 750 ohms. I jumped it with a 10 ohm resistor and everything started working.
I suppose the heat from the soldering iron may have screwed up that resistor, but it seems unlikely. Danged if I know! Ain't electronics fun? Anyway, I STILL wonder if it's possible to find circuit boards for the TKR720/820. de WD7F John in Tucson ----- Original Message ----- From: "WD7F - John in Tucson" <[EMAIL PROTECTED]> To: <Repeater-Builder@yahoogroups.com> Sent: Sunday, November 26, 2006 12:46 PM Subject: [Repeater-Builder] TKR-720/820 Can anyone tell me a source for parts for the TKR-720/820 repeater. Is Kenwood the only source? I have a Signaling Unit that crapped out. Somebody on the board is dragging down the 5V regulated and it's not easy for this old guy to see that tiny stuff, let alone solder it. de WD7F John in Tucson Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.409 / Virus Database: 268.14.16/552 - Release Date: 11/26/2006 Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/