I have a TR-4 that keys up as soon as the tubes warm up. Replaced the 6EV7 no luck. Checked negative voltage to pin 2 of the 6ev7 it is down to 4 volts vox and antivox have some effect on the voltage I can put the tube into cutoff with -10v I have very little Drake experience any help would be appreciated. Both pots check good on vox/antivox as well as bias supply from power supply and plate voltage is good to the 6ev7 is this a common problem? Thanks.
Bob kc0hfl ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
