Hi Helmut, As you have System 2000s, I wonder if you have any circuits or info on correcting the date on the GPS week rollover? Julian On 09/06/2022 15:26, 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 > > > > _______________________________________________ > time-nuts mailing list --time-nuts@lists.febo.com > To unsubscribe send an email totime-nuts-leave@lists.febo.com