Heathkit IB-1101 Frequency Counter Nixie Tube

Heathkit IM-4100 Digital Frequency Counter Ham Radio

Heathkit IM-4100 Digital Frequency Counter Powers On Ham Radio Test Gear

Heathkit IM-2400 digital frequency counter Untested

Heathkit RC-1 Radiation Counter Vintage Untested

Vintage HEATHKIT Frequency Counter Model IM-4110

Heathkit IM-4100 (EIA-416) Digital Frequency Counter Ham Radio Untested

HEATHKIT Model IB-101 Frequency Counter - Clean - Power Tested - Rare