HEATHKIT DIGITAL FREQUENCY COUNTER Model EIA-416

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

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

Vintage REDCO RFC-50 Frequency Counter Electronics Untested

OPTOELECTRONICS OPTO-7000 FREQUENCY COUNTER - No Power cord

Vintage HealthKit SM-128B Frequency Counter Powers On (Untested)

Vintage Digitron Frequency Counter 6550 USA - Untested As Is

Optoelectronics Frequency Counter K7000 VHF UHF UNTESTED / SOLD AS PARTS/REPAIR