[time-nuts] FTS 1200
John Miles
jmiles at pop.net
Fri Aug 10 01:12:34 UTC 2012
> John
> Oven did reduce in current and I can not imagine that it would be that
> close with an overheated oven. At 0 V it is within .5 Hz of what they
normally
> are. Ground has no effect but even 0.8 V on pin 2 stops oscillation
That's a suspicious-sounding voltage. Are you sure you're not
forward-biasing the varicap? Maybe some of these OCXOs were specified for
use with negative EFC voltage.
If so, then driving the diode with a negative voltage should raise the
operating frequency (which is what you want.)
-- john, KE5FX
www.miles.io
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