[Amps] Alpha 76 Plate Meter Calibration

[w5pvr at triton.net]

The Plate Meter on this restored two tube Alpha 76 needs recalibration. The
circuit uses the cathode voltage drop across a resistor measured by the
Plate Meter. The meter is converted to a volt meter by a series variable
resistor (pot.). it has a d'Arsonval 0-1ma basic movement If I knew the
resistance of the meter I could set it using Ohm's Law. Should be between 50
and 100 ohm's. I could do this hot but I shake real bad and I don't want to
get toasted. Any help out there?.
Bob