"MNACE" <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- Have you replaced the T/R relay with a known good one? Mark N5KAE
----- Original Message ----- From: "R. Ton" <[EMAIL PROTECTED]> To: "Drakelist" <drakelist@www.zerobeat.net> Sent: Saturday, April 15, 2006 7:22 PM Subject: [drakelist] TR-4C transmitter troubleshooting > > "R. Ton" <[EMAIL PROTECTED]> made an utterance to the drakelist gang > ---------------------------------------------------------------------- > I'm finally digging into a TR-4C I bought used some time ago. It "worked > fine" when it was shipped here, but I haven't been able to get any power out > of the transmitter. It at least oscillates -- I can hear it on a receiver > in the same room. > > Starting at the beginning... > > The manual says to adjust the bias on the AC-4 so that the plate meter reads > .1 amp. This is with the sideband switch counter-clockwise and the xmtr > gain all the way down. The meter seems to read about .025 in receive and > goes up just a little when the rig is switched to CW. Adjusting the bias > has no effect on the plate meter, but it does indeed adjust the bias > voltage. Setting it to -60 volts is no problem, but I'm unable to get any > "real" plate current no matter what I do. Any ideas? > > I haven't done anything to the radio since I got it except spray the > switches with Deoxit D5 and replace R45 (2 ohms -- plate meter shunt > resistor!!). This resistor was fried in half. > > What am I in for? > > Many thanks in advance! > > 73, Rob (KFØRT) > > ---------------------------------------------------------------------- > Submissions: drakelist@www.zerobeat.net > Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body > Hopelessly Lost: [EMAIL PROTECTED] - help in body of message > Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- Submissions: drakelist@www.zerobeat.net Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net ----------------------------------------------------------------------
