Good morning,
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
distorted over most of the range, and just _somewhat_ distorted over
the rest. This makes me think I probably need new choppers. I assume
these are unobtainum.
1. is my logic sound, or is there more likely a problem with the
driver instead?
2. what will a somewhat slow, distorted chopper waveform do to the
correct operation of this otherwise-excellent meter?
Thanks very much!
