PNP Germanium Tester

Based on this schematic (all R.G. Keen articles are great ! ) : Picking transistors for FF clone

Rangemaster treble booster OC44 to be tested :

Mullard NOS OC44

Leakage :

Mullard NOS OC44 Leakage166mV / 2400Ω = 70uA

Gain :

Mullard NOS OC44 Gain hfeHfe : [1.27V - 0.17V (leak)] x 100 = 110

A nice AC128 for a fuzz :

AC128 PNP germanium transistor

My tester :

AC128 PNP germanium transistor

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