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

Vintage Heathkit Transistor Checker Kit Model IT-18 Tester

Heathkit IT‑18 Transistor Checker Portable Socket & Wired IN & OUT of Circuit

Vintage Heathkit Transistor Checker Kit Model IT-18 Tester

VINTAGE Heathkit Transistor Checker Kit Model IT-18 Tester With Box /Tested

Heathkit Transistor Tester model IT-27 ~ UNTESTED, so listing as FOR PARTS . . .

Heathkit Transistor Tester model IT-18

Heathkit IT-27 Transistor and Diode Tester w/ 3 test leads, Operation manual.