[time-nuts] Maser manual
jmiles at pop.net
Thu Sep 2 03:03:47 UTC 2010
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.
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