[Amps] Checking SB-220 meter continuity

Steve London n2icarrl at gmail.com
Tue May 26 11:02:23 EDT 2020

The plate current meter in my SB-220 has gone flaky. R1, R2, R3 and the zener 
diode are fine. Sometimes, I can tap on the meter and it will come to life. 
Using something like a Fluke 87, what should the continuity across the meter 
measure ? Just want to determine if this is a mechanical problem or electrical 

Steve, N2IC

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