Vintage Heathkit IT-121 FET / Transistor Tester

Heathkit Utility Solid-State Voltmeter IM-5217 Voltmeter and Probe UNBUILT KIT

IT-18 Transistor Tester ‎MPN 309410-001 -- Untested/Parts & Repair

Vintage Heathkit IT-18 Transistor Tester, Circa 1968-1976, Tested and Working

Vintage Heathkit Model C-3 Condenser Checker Leakage Tester

HEATHKIT MODEL IT18 IN CIRCUIT/OUT CIRCUIT TRANSISTOR TESTER SOLID STATE.

Heathkit Transistor Checker Kit Model IT-18 Tester Vintage Untested IT18

Heathkit Transistor Tester model IM-36 (Untested)