[time-nuts] Maser manual (2)

[John Miles]

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-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of Kit Scally
> Sent: Wednesday, September 01, 2010 8:34 PM
> To: time-nuts at 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
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