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#1
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Old GE Transistor
I came by a bunch of 4JX1D765 transistors made by GE in around 1962. I can’t find a modern cross for them. Does anybody know if they are particularly useful - or just junk?
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#2
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Most any transistor that old is collectible or useful as a replacement. It's very hard to find replacements for germaniums that once came in thousands of different types; now only a handful of off-the-shelf replacements remain (NTE, for example). Nothing gets the axe faster at the parts vendor than technology over 20 years old Could you post a picture here maybe?
You could also list them on eBay with the word "FUZZ" in the title. Some joker will wire 'em up in a distortion pedal and abuse 'em like they were a 75-year-old NOS pair of 2A3's. |
#3
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Thanks. That is what I thought. When I was a kid I had an electronic experiment kit (board). One of the experiments was to drive a germanium transistor to avalanche conditions and listen to it (as it failed). The instructions never mentioned ruining the transistor. I guess all the other kids that had one of those kits grew up to be guitar amp builders.
I will try to get a picture, but, it is a black "top hat" with a prominently displayed GE logo. I forget what base that is called now (TO-???). |
#4
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#5
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I believe the 2N2712 (a silicon transistor) can be used in reverse biased EB junction
avalanche without arm. An old article in Popular Mechanics (Build a Pink Noise Generator) described that many years ago. P.S.: actually in Popular Electronics. Sorry about the mistake Last edited by electroking; 09-09-2010 at 10:57 AM. Reason: added correction |
Audiokarma |
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