Heathkit It-121 Transistor FET Tester - *For Parts or Repair Only*

Heathkit Assembly Manual IT-121 FET / TRANSISTOR TESTER

Heathkit IT-121 FET/TRANSISTOR TESTER Assembly Manual

Heathkit IT-27

Vintage Heathkit Transistor Checker Kit Model IT-18 Tester

VINTAGE LAFAYETTE TRANSISTOR ANALYZER KT-223

Vtg HeathKit Model IT-3120 FET/Transistor Tester Replacement (Gauge Only) NOS

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