My Driver Q6 has too high voltage on the emitter, 0.42 volts instead of 0.23-0.30 volts. It gets very warm and current through it kept increasing until I lifted it off the PCB and installed a separate cooler on it. Now current is stable (and I constantly get very good audio reports on SSB.)
Transmit current on SSB no audio is 0.60 amp. Can I reduce the drive current through R47-R48 adjustments, or should I suspects something to be broken? Q6 base is 1.075 volts which is normal. Seems like the 2SC5739 has too high gain? Regards, Lennart - SM6KNL -- View this message in context: http://n2.nabble.com/K2-RF-Q6-2SC5739-too-hot-tp1565547p1565547.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
