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Heathkit IM-13 - Ohms adjust pot - Part 1
Heathkit IM-13 - Ohms adjust pot - P 2 + ?
Heathkit IM-13 - Checking pots
Heathkit IM 13 - New parts in
Heathkit IM-13 - Troubleshooting begins
Heathkit IM-13 VTVM Repair
HeathKit VTVM IM-13 Autopsy
DERB - Heathkit IM-13 - First look
Heathkit IM-13 - Take apart the tube socket
Heathkit IM-13 - Now it makes sense
Heathkit IM-13 - Transformer replaced
Heathkit IM-17 Utility Solid State Voltmeter: History, Restoration, Demonstration, Theory
