Hi,

I'm looking for some help calibrating an old Federal 432 analog gage amp with EHE1048 gage head. Anyone out there old enough to be familiar with the internals on those units?? It consistently reads .0002" greater per .001" step. Measurements taken with gage blocks.
This is a fleabay item and I do not want to send it out for service. I have oscilloscope and RMS volt meter to probe the inside.

Thanks!

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