[time-nuts] Hameg HM8125 Time/frequency Standard

Ian Sheffield ian.sheffield1 at tesco.net
Tue Jul 22 02:51:54 EDT 2008


Hello,

Does anyone have a copy of a schematic or service manual for the down-converter for the Hameg HM8125
GPS frequency/time receiver?

The receiver and display seems to be working fine, but the separate down-converter appears to have been modified with a capacitor blocking the DC power feed from the receiver and what may be a voltage regulator has been removed. The downconverter appears to do more than just shift frequency, as it has a TDA 1574 FM subsystem chip in it as well as the expected RF circuitry.

Any help would be appreciated, or even if someone had a spare downconverter for sale.........?

These units do unfortunately, appear to be as scarce as hens' teeth.

Thanks in advance,

Ian Sheffield




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