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whit3rd whit3rd is offline
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On Thursday, June 14, 2018 at 4:00:43 PM UTC-7, wrote:
"I tried searching for geraniums just to see if it worked ok, and a couple of surprises turned up:

2N671 Veb 40v
2N675 Veb 70v

Really ? Seventy frikken volts ? That is phenomenal.

What can I do with that ?


The obvious case is some kinds of one-transistor oscillators
that reverse the base bias (a class C oscillator, obviously).

It's an artifact of Ge alloy transistor construction, the emitter was a plated-on metal that
(when heated) diffused in. The collector was the same thing, from the
other side of the Ge slab. And the slab itself, the 'base' was the
third contact. So, the B-E and B-C breakdowns weren't very different.