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Registered Member #3108
Joined: Thu Aug 12 2010, 05:37PM
Location: Worthing, England
Posts: 72
Sorry for lack of info, they are NPN transistors, I don't know how to test the EB forward voltage. And the lead that is connected to the case, I assumed that would be the collector..?
Registered Member #2463
Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
The GE 213 could be replaced with a MPS2222A. There is at least one other GE4 by General Electric and your's isnt it.
Starting about 50 years ago there were about 12 fits-all transistors that could replace many and by 1970 those few could replace about 10,000 types. The 213 and the 4 were fits-all types made by GE to sell into the hobby market and the transistor radio repair market.
What would the antique radio crowd pay for these tubes?
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The unknown parts thread
