[time-nuts] FE-5440A cesium clock help

[paul swed]

I did take a look to see if a manual was available online. There is for
something like $817 or was it $1700 absolutely a crazy price for a manual.
Regards
Paul

On Thu, Oct 31, 2019 at 10:03 AM paul swed <paulswedb at gmail.com> wrote:

> Emmanouil
> It sounds like you are very lucky to have obtained a working CS reference.
> I speculate it may be set for a different time scale. There is usually a
> setting that can be adjusted. Check the manual. That may be the harder item
> to find. Good luck.
> The other thing I have run into at least on HP 5061a is that the c-field
> was set for a different tube and that forced a offset that was large.
> Though I have to say .003 hz seems really large to me.
> Regards
> Paul
> WB8TSL
>
> On Thu, Oct 31, 2019 at 8:02 AM EMMANOUIL MANTZARAS <sv1bke at usa.net>
> wrote:
>
>> Hallo group
>> I recently acquired an FE-54440A cesium beam clock. I do not know nothing
>> about his history. Seems to be connected to the mains by the previous
>> owner (a
>> surplus broker).
>> The meter readings seems correct. Supply voltages are ok, Vac-Ion current
>> reading is about 0 (strange because that i believe that the unit was in
>> storage for a long time).
>> After about 20 minutes the cs and osc ovens stabilized. With loop open the
>> beam current peaks at the correct oscillator frequency. The unit turns in
>> "operate" condition when the loop is closed. The second harmonic level is
>> ok
>> with little fluctuation. With unit in "operate" condition and after 12
>> hours
>> of warming, there is a constant frequency difference of about 0.003 hz
>> from my
>> two  Z3801 gpsdos. Any idea about this condition? Any help is appreciated.
>>
>> Regards
>>
>> Emmanouil Mantzaras
>> sv1bke
>>
>>
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>