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ADA Microtube 200 Help Needed

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davec69:
Yes.  I'm measuring the diode adjacent to R31.

davec69:
Don't know if it helps, but I went through and tested forward voltage drop for all of the diodes in the area.  Here's what I found:

D20 .483
D21 .514
D22 .674
D23 .552
D24 .694
D25 .543
D26 .523

MarshallJMP:
D26 is a zener diode of 15V and D24 is a zener diode of 6.2V so you should have those voltages over these.

Sparker:
Were these readings measured using the Vdc setting on the meter (with the amp fully powered) - not using the diode check function (diode symbol) with the amp power off?

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