[time-nuts] Re: Need help to DATUM Power Supply MPS (Type MFS Modular Frequency Systems)

[Glenn Little WB4UIV]

Here is what I have.
There is enough information to determine transformer requirements.

Glenn

On 6/9/2022 10:26 AM, jung.schorndorf--- via time-nuts wrote:
> Dear hobby frequency and time device enthusiasts,
>   
> I'm a German amateur radio listener, a retired electrical engineer and I'm
> an electronics hobbyist with a penchant for
> precise measurement technology. My modest systems are older and have defects
> again and again.
>   
> During my long unsuccessful search for a technical detail on my defective
> power supply unit for the GPS frequency standard
> from DATUM (Type MFS Modular Frequency Systems), I visited your homepage and
> registered on "time-nuts" mailing list.
> .
> May I ask if you have a frequency system like this with better documents
> than I do?
> The problem is the defective mains transformer in the Power Supply MPS
> module. I'm looking for the data (voltage & current)
> to find the right one from my transformer collection.
> I can only measure a few coil resistances on the transformer, the primary
> coil doesn't work at all.
> Also, maybe someone has the circuit of the electronics board.
> Our German subsidiary DATUM-Symmetricom-Microchip no longer since 20 years
> has any documents.
>   
> I also have 2 more DATUM GPS frequency standards (System 2000), the GPS/ED
> 167 from Meinberg/R&S and 2 DCF77
> frequency standards from Plisch (POG 110) and Hirschmann (NFA-NFE 800).
> Attached are photos of my defective power supply.
>   
> I am happy about every answer.
> Best regards
>   
> Helmut Jung
> GERMANY
>   
>   
>
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-- 
-----------------------------------------------------------------------
Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI, FRA, NRA-LM    ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
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