[time-nuts] Hameg HM8125 Time/frequency Standard

Alan Melia alan.melia at btinternet.com
Tue Jul 22 05:50:12 EDT 2008

Hi Ian I dont know whether it works for that unit, but try the Hameg site.
There are "almost" complete manuals for all the units (well certainly the
scopes!) You may find that there are no schematics in the English
versions....download the German versions (which you may see are bigger
files) and the are often schematics at the back of these....the titles etc
are also bilingual.

Hope that helps
Cheers de Alan G3NYK

----- Original Message -----
From: "Ian Sheffield" <ian.sheffield1 at tesco.net>
To: <time-nuts at febo.com>
Sent: Tuesday, July 22, 2008 7:51 AM
Subject: [time-nuts] Hameg HM8125 Time/frequency Standard

> 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
> 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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