Vintage Heathkit Model ID-101 Electronic Switch for oscilloscope Powers Up.

Vintage Heathkit Zenith Educational Electronic Design Experimenter ET-3100

Heathkit ID-101 Electronic Switch

Vintage Working Heathkit Vacuum Tube Voltmeter Model IM-5228

Vintage HEATHKIT ELECTRONIC SWITCH Model S-2 Vintage / Antique

Heathkit Model ID-4101 Electronic Switch

One New Heathkit #19-116 Switch for IG-5228

Vtg Heathkit Electronic Switch ID-4101 120/240V 50/60Hz