Tube DIY Asylum

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RE: My meter is scaled to 200 ma.

Posted by Chip647 on June 20, 2017 at 08:06:10:
I have a ton of old panel meters. Most labeled "mA" that have a low scale (500mA or less) are 200mV DC meters without an internal shunt.
Amp meters that are above that always have an external shunt. Far cheaper to test than to assume. :-)