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Old 13th May 2022, 10:33 am   #4
Hartley118's Avatar
Join Date: Aug 2015
Location: Cambridge, Cambs. UK.
Posts: 1,996
Default Re: Germanium transistor replacement

As an example, a couple of weeks ago I had to replace a dead AF117 frequency changer in my Bush TR130 transistor portable. The only PNP transistor I had to hand was a common-or-garden silicon BC214. It works fine. It of course ran at a lower collector current because of the higher Vbe of the silicon device, so I increased it by lowering the emitter resistor value. But that made no apparent difference to its performance.

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