I have a Simpson 923A panel meter, 1 amp full scale. It is reading
low by about 6%. When it has 800 ma through it, it indicates about
750 ma. I'll be using it in my 8877 amp at 800 ma and I'd like it to
be more accurate.
If it were reading high, I could just shunt it, but reading low...???
Is there a way to calibrate it by adjusting anything inside? Moving
the magnets around, etc? I'm sure the factory calibrates them somehow
but I've never read anything in the ham literature about how to do it.
Suggestions appreciated.
73, Bill W6WRT
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