[time-nuts] FS or Swap: Oscilloquartz Model 3210 Cesium Frequency Standard

[Chris Quayle]

Oscilloquartz Model 3210 Cesium Frequency Standard
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This unit is from a lot of three bought around 2014, each
part of a Racal Portable Frequency Standard in a short
rack with backup battery power supppy. One had faults
that I was unable to fix, no preamp or harmonics,
suspect tube failure, and went to a collector in Japan
for spares. The other two worked fine. They are an all
analog unit, with no processor or other complications
and assuming that the vcxo is warmed up, will go into
lock within 5-15 minutes from start of cesium oven
switch on. Once locked, preamp and harmonic levels are
slightly offscale initially, but settle down over
about 24 hours to a stable state, as the unit warms up.
Suspect these are low hours because of fast lock, high
tube signal levels and the fact that these were only
designed for temporary use, taken to sites for
calibration of other equipment. Good cosmetic condition,
though the internal nicad packs were dead and have been
removed. Line or 20-30 volts DC power via rear connectors.
Outputs are 1, 5 and 10MHz sine via front and rear panel
bnc connectors. Both have the digital led clock option
fitted with leap second, cfield and delay correction settings.
The two standards show unmeasureable phase drift against
each other. Very low drift against a gps do, which appears
to step up to few degrees per minute, very slowly and thus
likely to be a measure of the gps do uncertainty itself.
Use an HP8405A vector voltmeter for that sort of visual
test.

Looking to dispose of one of the two and had thought
of Ebay, but this list might might be a better start.
Looking for 2450 ukp or close, but am really looking to
swap for an HP 3458 8.5 digit voltmeter in good working
order. Have the volt nuts disease as well and am working
on some ideas for low cost voltage references. Location
Oxford England and can build a padded wooden case and
ship worldwide if needed, at buyer's risk. Better to be
collected though, as it is a bulky (about 28kg) and
fragile item and better that it can be shown working.
Full manual  and schematics supplied, courtesy of a user
here on time nuts when I first aquired the standards...

Regards,

Chris