A Look Inside #19 - Harmon 4200B Selective Voltmeter - Fix/Repair - PT2

In this video:
At look at the Harmon 4200B Selective Voltmeter, it's operation, fixing issues.

History on the Harmon Industries company:
https://www.encyclopedia.com/books/po...
PCB History:
https://how2electronics.com/history-p...
Harmon 4200A Selective Voltmeter Instruction Manual - April 1974:
https://www.scribd.com/document/28885...
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