What was wrong with the original oscillator, out of curiosity? I'm troubleshooting the lamp exciter in my 5065A right now, and the circuit is the same basic series-tuned Colpitts design as the one on page 174 of the maser's service manual.
The 5065A is showing occasional phase jumps on the order of 10-100 ps that coincide with small spikes in the current drawn by the lamp exciter, and I'm leaning towards blaming the silver-mica B-E feedback capacitor. (It even has the same designation in both instruments' service manuals, C2.) Tom: this is why your BVA was appearing to jump when I measured it. :-P -- john, KE5FX > > -----Original Message----- > From: Corby Dawson > Sent: Wednesday, September 01, 2010 3:48 PM > ----- snip ------ > I also had to replace the disassociator oscillator with an > oscillator/amplifier of my own design. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.