[EMAIL PROTECTED] wrote: > i have a problem with my HP10811 ocxo. I connected it properly to 24V, 12V > and to my counter to measure its frequency. The measured frequency is 10.887 > MHz, but it should be 10MHz (also noted on the 10811).
The oscillator has obviously jumped to the so-called B-mode of the SC-cut crystal. The C-Mode operation (3rd overtone) is enforced by a circuit consisting of two inductors and two capacitors which is connected between base and emitter of the oscillator transistor. Unfortunately I do not have the shematic in hands here, so I cannot tell you the element IDs. Maybe one of the elements suffered of excessive aging. I can give you more specific help tomorrow, when I am in my office. Best regards Bernd DK1AG _________________ AXTAL GmbH & Co. KG Facility MOS Wasemweg 5 D-74821 Mosbach / Germany fon: +49 (6261) 939834 fax: +49 (6261) 939836 www.axtal.com _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
