[time-nuts] HP 5065A control

Bill Hawkins bill at iaxs.net
Wed Nov 3 12:46:51 EST 2004


Recently installed a 5065 in a steel rack cabinet, and needed
to move the magnetic field adjustment from 320 to 400 or so.
When I changed the field, the 2nd harmonic meter reading went
unstable, showing random values between 10 and 50. This would
settle down to 12 with an occasional tic upwards. Is that
normal behavior?

Given the sensitivity to the field adjustment, it seems to me
that a servo capable of swinging the field a few minor divisions
could be built with a long time constant. This should allow the
5065 to be brought exactly to GPS time from an HP Z3801 receiver.
Has anybody tried this? Anybody know why it wouldn't work?

Bill Hawkins

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