I do not know the circuit in question but could you unsolder the varactor, solder in a 10pF cap and look at the output?
The frequency would not be stable but if the varactor was the culprit, you should see less noise. My 2ยข anyway DaveH > -----Original Message----- > From: time-nuts-boun...@febo.com > [mailto:time-nuts-boun...@febo.com] On Behalf Of Rick Karlquist > Sent: Friday, October 19, 2012 11:01 > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] HP 10811 Tuning Diode > > I wonder if the glass case got a crack in it or if the kovar seal > was failing. Maybe a failed solder joint (which gets fixed when you > install the new diode). I've never heard of a noisy varactor > before either. > > Rick > > > _______________________________________________ > 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.
