What to do with Russian low-gain MP37 Transistors?

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

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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modman
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Post by modman »

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)

https://www.ebay.com/itm/MP37-103NU70-2N ... 1075568421
http://electron-pv.com/PDFs/Transistors ... _mp38a.pdf
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guysmiley
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Post by guysmiley »

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.

tonyharker
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Post by tonyharker »

First they could be used as clipping diodes, second if the leakage is low enough you could use them as a darlington pair.

guysmiley
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Post by guysmiley »

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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modman
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Post by modman »

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