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2 ways to test germanium diodes 1N34A 1N60 for real vs fake Schottky counterfeits
- 1 Use a cheap component tester.
Real Ge diodes read Vf in the 200's mV and uA leakage.
Fake Ge diodes read Vf in the 300's mV and nA leakage. Most testers will also give a capacitance reading, whereas real Ge diodes will not show capacitance on these component testers.
- 2 Pass a sine wave through the diode.
Real Ge diode passes a nice looking sine wave.
Fake Ge diode passes a very distorted wave.