Germanium Power Transistors?

If there are crystal-like deposits, look for a bad electrolytic that could have "popped" and caused them.

There were no caps under the cover of the inverter. Really strange. I purchased 2 new transistors (there are two in a push/pull configuration). However, I am hesitant to install them as they were $20/transistor. The discolored transistor tests good.

Thanks, Chris

Are the "crystals" shattered glass from glass sealing/encapsulation, around the leads of the transistor? Replace with any old Si device and run at low voltage and see what happens around it before sacrificing a second Ge power tr

-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on

Do we know what brand/model deck this is?

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Well my dad and I took a closer look at the situation. I would say for sure they are metallic crystals. However, the transistor that is in there now has been blued from excessive heat, there is no rupture on the can, so we figured there was a transistor that had blown in there before and it had been replaced. It is pretty obvious that it was the transistor that caused the deposits because of the patterns and positions of the markings. If I were to take a stab I would say that they are Ge crystals. The crystals are really small and they look like this:

Pretty strange eh?

Thanks, Chris Maness

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It is made by a movie sound company called Amega, and the model is M-3. I have another post

Regards, Chris Maness