If the thing has a variable cap to tune the osc. My bet is thats the devil. In cheapy telco RBs they have given me lots of trouble.
On Wed, Sep 1, 2010 at 11:40 PM, John Miles <jmi...@pop.net> wrote: > Good point -- I should swap out the feedthrough as well. There is only one > in this case, for the power lead-in, but if it is growing internal whiskers > or otherwise failing I could see it causing this symptom... > > -- john, KE5FX > > > -----Original Message----- > > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on > > Behalf Of Kit Scally > > Sent: Wednesday, September 01, 2010 8:34 PM > > To: time-nuts@febo.com > > Subject: [time-nuts] Maser manual (2) > > > > > > John, > > > > I'd put money on one of the feedthrough caps (easily damaged upon > > installation) in the Maser for such small jumps. > > >From memory, the 5065A uses SM components, but these could be guilty. > > > > I've learned many abstract things I'd never otherwise come across > > in this thread on home-built masers. I for one would like to see > > more mileage on this topic although I'm not sure there's $25k in > > my "Xmas box" for the necessary parts to build one ! > > > > Kit > > VK2LL > > > > >>>snip > > 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 > > >>>snip > > _______________________________________________ > > 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. > _______________________________________________ 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.