[time-nuts] Oscilloquartz 3210 Cesium Standard Schematics

Tom Van Baak tvb at LeapSecond.com
Wed Jul 11 18:58:03 EDT 2018


> i have been lucky to found a working Oscilloquartz 3210 Cesium ( warehouse of a telco operator ) in a good shape.

Nice find. The OSA 32xx manual that I scanned is at:

http://leapsecond.com/museum/osa3200/

That's 33 pages of "Operating and Instruction Manual". If your unit is working within spec, that's sufficient. I'll check if additional manual pages are around here somewhere, in case you need to repair it.

> seems ok and stable 

Words like "ok" or "stable" are vague; try to give numerical measurements for accuracy and stability. That will help determine if your vintage Cs clock is actually working to spec or not.

Also log values over time. The ion pump should not have been zero if the unit was sitting in a warehouse for 20 years. But after some hours or days, yes, it could be near zero and this might be a good sign.

For an old, surplus, vintage Cs standard, its best to carefully monitor everything immediately after power up and continuing for several hours or days. The trend lines will tell you a great deal about the condition and prognosis of the instrument.

/tvb


----- Original Message ----- 
From: "Giorgio Barinetti" <giorgio at barinetti.it>
To: <time-nuts at lists.febo.com>
Sent: Wednesday, July 11, 2018 3:17 PM
Subject: [time-nuts] Oscilloquartz 3210 Cesium Standard Schematics


> Hi Guys,
> 
> i have been lucky to found a working Oscilloquartz 3210 Cesium ( warehouse of a telco operator ) in a good shape.
> 
> Powers up, seems ok and stable ( capacitors on the unit has 10/1974 date, so very old unit, serial 83), but the signal
> From the preamplifier is a little low and the Ion Pump current is 0. Like the 3 Kv supply is low ?
> 
> Like to investigate but it will be nice to have a schematic.
> 
> I've found a 2014 message where Tom was willing to scan the remaining part of the manual, so I'm kindly asking :)
> 
> 
> Thanks,
> Giorgio Barinetti
> 
> 
> 
> 
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