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Heathkit T-4 & IT-12 Signal Tracer Full Teardown & Complete Restoration
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Heathkit IP 18 Teardown & Full Rebuild
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Heathkit IG 102 The Good, Bad & Unobtainium
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how to make 220volt free electricity energy from big copper wire and spark plug
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Heathkit IO-102 Repair, Mods & Demo
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Heathkit Sb-220 Harbach Metering Board, Harbach Filter Cap Board, New Plate Tune Air Variable Etc
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