> If the bias is ok, then Check the screen resistors on the final tubes. These resistors occasionally fail. Note: most tube checkers do not have the current to "check" a 6jb6 accurately.
Good luck. David Assaf, III >From W5XU Desktop -----Original Message----- From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net] On Behalf Of Garey Barrell Sent: Saturday, January 23, 2010 12:04 PM To: drakelist@zerobeat.net Subject: Re: [Drakelist] T-4XC carrier in the R-4C receiver Sounds like the Bias supply may have failed, or be failing. Have you been able to set the transmitter idle current per the manual?. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs <www.k4oah.com> k...@juno.com wrote: > I recently acquired a R-4C receiver and T-4XC and the transmitter has a problem. With power applied to it after warm up the meter on transmitter will go negative to the left of zero and i get a carrier in the receiver at about 60 db on the same frequency on both VFO's. checked all tubes and they seem to be OK. The carrier will change in amplitude with tuning of the final tank for max output. Could someone give me an idea on what to do to trouble shoot it. > > Rex Meier > KQ0Z > > _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.730 / Virus Database: 271.1.1/2640 - Release Date: 01/23/10 01:33:00 _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
