[time-nuts] Still looking for a schematic drawing for Oscilloquartz 8600-3 (945.860.011.03 S/N 422)

ed breya eb at telight.com
Thu Oct 25 18:30:46 EDT 2018

It seems rather drastic to scrap a basically working unit for lack of 
info. If you can't find anything, then there's a wide range of 
possibilities - you've got nothing to loose then, so try tweaking the 
circuit design a little. It should be  evident where the coarse tuning 
and oscillator circuitry is. If the oven is operational and gets hot, 
then assume its temperature is about right, or measure and compare to 
any markings inside - many OC crystals I've seen have the turnover 
marked right on them, or on the assembly. Then figure out just the 
coarse tuning section circuit, and you'll be able to see how to move the 
frequency a hair either way, usually by changing the value of a fixed 
capacitor (but can sometimes be done by changing an inductor) in the 

Good luck.

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