[time-nuts] Z3801 outer oven temp?

[Richard H McCorkle]

Hi Dick,

Back in 2004 Stefan Hegnauer reverse engineered the outer oven controller
in the Z3801A and posted the schematics and a PSPICE simulation. Apparently
they are no longer on the web, but his conclusion was:

"The outer oven of the Z3801A GPS disciplined crystal oscillator is used
to keep the ambient of the inner oven of the oscillator (HP10811) at a
roughly constant temperature of somewhere between +60...+65 °C. The exact
value is not known to me. Because the Z3801A is specified from 0...+50 °C,
and the HP10811 is specified for ambient temperatures of not more than
+71 °C,  I think this makes sense."

Hope this helps,

Richard














> Hi folks, wondering if any of you can tell me the outer oven
> temperature of the Z3801. Since the 10811As run in the range of 80-85
> deg C, I'm guessing it might be something like 40 deg C?
>
> Dick Moore
>
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