The Lazy Man's Germanium Tester

[mozz]

I've seen old tube testers have a headphone jack, to test for noise. I think a simple circuit like a range master would suffice. They (Hickok,HP, Fluke) used to make semiconductor analyzers but they still want a good buck for used ones. I'm tempted to make one to measure noise with output hooked up to a wideband level meter, scope and headphones. Usually the noisiest are high gain with high leakage, but not always.