![]() In July 1985, Discrete Semiconductor Industries (dsi) was founded in Riviera Beach, Florida, specializing in the manufacture of high reliability (HI-REL) electronic component parts for the American and European aeronautics and transportation markets. >Are DSI still making new Ge transistors? I am an alternative for people like the OP who need a handful of parts and want assurance that what they get will have a decent yield in the gain buckets they need. ![]() SBE is and does-thank you pinkjimi!-but the price per bulk germanium device is necessarily high. Most shops like New Jersey Semi are not geared to fill small orders-something to be aware of when shopping. This uncertainty is in the nature of the beast-please excuse the unintended humor. Depending on what raw stock they started with and how tightly they are sorted, you might or might not get a good yield of parts suitable for pedals. When they "make" a 2Nxxx, what they are offering is a part that they guarantee will meet the datasheet spec for a 2Nxxx. ![]() What they do have is large quantities of raw stock-sometimes branded and sometimes not-and the people and automated equipment needed to sort, test and mark parts. All of that said, neither they, nor any of the many other brokerages I have dealt with, actually melt germanium in order to make new parts. They also subscribe to databases that list stock in other shops, and they will fish for you if know what you need and can make it worth their while. Unlike some shops that are just a person with a telephone and a net connection, they actually do have (a lot of!) stock on their shelves. They are reputable, which is saying a lot in the world of semiconductor dealers. I have bought things from them over many years. New Jersey Semi is a brokerage and distributor. now there's none for anybody, where there used to be SOME for anyone. I had a surplus source i used to get them from, but i was kind and turned a few folks on to them and they bought up all the stock. odds are if i bought a larger lot, it would be mostly garbage. I'd take a gamble on 100, but i suspect that these values were chosen, not random. I'd say they suck, BUT getting more than 1 useable new ge transistor out of a batch of 10 is highly unusual in my experiences. 20 bux and 2 months later, i got 1 good transistor, 4 decent ones, 3 crummy ones and 2 duds out of 10. The ones that read as jfets sounded weak and farty and shitty as hell. ![]() all 5 sounded decent in q1 of a fuzzface, not so great in q2. The remaining 5 came up with hfe's of 30, 40, 50, 60 and 67 was the highest. 3 came up on my test as p channel jfets witha vgs of 65 VOLTS I bought 10 of the "ac128"s from china to try 'em ![]()
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