Pat, re-check your R30 voltages. You may have something associated with T5 and the rest of the VFO that is not soldered - an unsoldered connection may work FB one day and fail the next.
73, Don W3FPR > -----Original Message----- > > A week or so ago I contacted Gary about a problem with excessive current > on Q6 when I was trying to do the 40 meter transmitter cal. Turns out > that Q10 was shorted driving the base to 4 volts key down. Replaced Q10 > and that problem is fixed. > > Now, however, the VFO is inoperative. It had worked FB before and the > receiver seemed very hot. Now I can hear background noise and QRN but > can't tune in stations. The readout changes like it should but the > oscillator stays at one frequency. I verified this with an external > frequency counter as well as the built-in one and same with a spectrum > analyzer. The oscillator is running and it puts out RF as it should but > not on a given frequency. With 80 meters selected I get the following > frequencies; TP1 7788.6, TP2 4914.17, TP3 12092.17. I checked U6B pin 5 > and get the 4V ref, pins 6 and 7 never change their values regardless of > turning the frequency knob. Am I overlooking something? Is there some > hidden menu I might have activated? I was very careful when removing and > replacing Q10 and besides, it isn't anywhere near the affected circuitry. > Any ideas? > > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
