What to do with Russian low-gain MP37 Transistors?

Frequently asked question on transistors: types, substitutions, how to test, use and misuse them.

What to do with Russian low-gain MP37 Transistors?

Postby guysmiley » 31 Jan 2015, 16:30

So I randomly(stupidly) ordered some germanium transistors off Ebay, without doing research first. I now have a ton of MP37 transistors, which were super cheap, but they seem to be too low gain for anything I've built. They just don't have much in them. What should I do with these? Trash? I can't think of anything that they would work for. Any suggestions? They do look cool. Haha. :roll:
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Re: What to do with low-gain Transistors?

Postby modman » 31 Jan 2015, 16:43

This could have been interesting if you had:

1) mentioned the seller - so other won't make the same mistake
2) mentioned the gain (5-120Hhfe says datasheet)

http://www.ebay.com/itm/MP37-103NU70-2N ... 1075568421
http://electron-pv.com/PDFs/Transistors ... _mp38a.pdf
"The whole point of diy is diy. It's not dsoiyathodtr - do some of it yourself and then have others do the rest" (paulc)
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Re: What to do with Russian low-gain MP37 Transistors?

Postby guysmiley » 31 Jan 2015, 16:48

The seller was bg2014-manue. I can't say they did anything wrong, my own ignorance cost me about $6. The Hfe seems to be about 15min. Well, the good news was there were some random other transistor that came in the package that worked for other projects I had. So not a total waste.
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Re: What to do with Russian low-gain MP37 Transistors?

Postby tonyharker » 31 Jan 2015, 18:20

First they could be used as clipping diodes, second if the leakage is low enough you could use them as a darlington pair.
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Re: What to do with Russian low-gain MP37 Transistors?

Postby guysmiley » 31 Jan 2015, 18:22

I was just reading about the diode idea. Too bad I already boxed up a pedal with diodes. Next pedal for sure. Thanks!
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Re: What to do with Russian low-gain MP37 Transistors?

Postby modman » 31 Jan 2015, 19:22

Thread moved here: viewforum.php?f=44
You can do searches on this subforum only specifically.
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