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drawings to illustrate descriptions
GNG transistor tester 6.3V CT input probes input, external
produces these CRO displays open good diode short good transistor 2 diodes back to back, use 6.3v resistance angle changes with value good diode(?) ans shunt resistor small capacitor large capacitor good diode and small capacitor good diode and large capacitor if figure become overly complicated, lift base or common emmiter or collector