> 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 _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.