开云体育

-----Original Message-----
From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]On Behalf Of Christian A
Weagle
To: hp_agilent_equipment@...

I have a 419A Nulling Voltmeter that I just finished replacing all the
electrolytic capacitors in. This cleared up my 'after warming up no
operation' problem. However, I also had to really have my way with
both the chopper freq adj and neon current adj pots to get them to
fire _something_ like reasonably. I can't get the frequency to be
correct (too slow by close to half), and the waveform is pretty

I don't know the 419A. For what it's worth, my Fluke 895A differential
voltmeter had a distorted chopper waveform that was about half normal
frequency. Turned out to be a short on one of the power supplies that
the chop oscillator drives in addition to the choppers.

Dave Wise