[time-nuts] Symmetricom/Datum FTS-1050A Disciplined Frequency Standard (long time constant loops)

[cdelect at juno.com]

Speaking of long time constant analog loops for oscillator disciplining,
see the attached  PIX of the loop filter module from an FE AN/URQ-23.

Also a PIX of the schematic.

It is switch selectable for 1 or 100 Second time constants.

I is also hermetically sealed to prevent leakage effects as it uses a
2500 MegOhm resistor!

The Op Amp used is an AD515K.

I've played with it in the loop of an HP5065A.

Cheers,

Corby
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