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RE: Question on biasing MA-1 with DMM

Thanks Lew for offering your thoughts.

I understand the bias is measuring DC current. What confuses me is that the built-in meter is an amp meter used to measure both DC offset and bias and, to my knowledge, the meter is wired across the two speaker posts via the test/operate switch. One depresses the test/operate switch to engage the meter.

If one can measure the DC offset by engaging the amp meter or by measuring the voltage drop between the two speaker posts, why would it be different for the bias? I wonder how the meter is wired?

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