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

[Magnus Danielson]

Hej Ulf,

So, Pendulum was sold off at one time and was under the Spectracom. The 
Rapco 2804 was probably rebranded as Pendulum there for a while, and was 
not a design that came out of the Bälstabro design office and manufacturing.

Search for Rapco 2804 gives more info.

Harald bought the rights for Pendulum back, and they have now developed 
a new counter that is released. They showed-cased that at the IFCS/EFTF 
in Toyama, Japan. Unfortunately I did not have budget to attend that.

I can't recall that Pendulum ever had any manufacturing in UK. Sweden 
and Poland, yes.

Cheers,
Magnus

On 2023-05-28 20:58, Ulf Kylenfall via time-nuts wrote:
> Greetings,
> Picked up a Pendulum 2804 (Possibly -B)Â  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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