[time-nuts] Pendulum 2804 Master Clock. Anyone that can provide documentation?

Ulf Kylenfall ulf_r_k at yahoo.com
Sun May 28 18:58:01 UTC 2023


Greetings,
Picked up a Pendulum 2804 (Possibly -B)  Master Clock at a flea market.
Fault indicated on a label: Locks randomly at any frequency 10 MHz +/- 5 Hz.
Suspecting either OCXO or driving circuitry as the GPS data presented seems OK.
I have not been able to find any information whatsoever on the internet.
Pendulum has been owned by swedish an polish entreprenours althoughit seems that this instrument i manufactured by Pendulum UK as thereis a label inside with a +44 country code telephone number.
The OCXO is a RAKONCFPO-D03 51B S12 - Found data sheet for this type.
I suspect that the OCXO may be faulty as it right now, after warm-up is at9.999.995.78 Hz, but without being able to tell what the links on the PCBdoes or a schematic diagram it will be a bit difficult to find the fault.
Any one that has a manual in .PDF willing to share it?
Best Regards
Ulf KylenfallSM6GXV





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