-=> Roy J. Tellason said to Greg Mayman
 -=> about "*BIG* TRANSISTORS" on 01-08-04  04:06.....

 RJT> It's not like you're bumping into these parts every day, though...

Yeah. The only devices I have like that are some SCRs that I've
put away safely for some project, darned if I know where...

 RJT> Yeah,  I'd be a bit disappointed if the gain were less than 20.   :-)

I was once using some TO3 power transistors that dropped down to
a gain of 5 worst case at maximum current/minimum voltage. And of
course that is the combination you ARE likely to get as you push
them towards saturation.

Fortunately the ones I tested were all above about 10. But you
have to design for worst case replacements, especially when
you're looking at a run of ten or more and a projected life of
several years.

I rather think that was one project that I eventually abandoned.

From Greg Mayman, in beautiful Adelaide, South Australia
   "Queen City of The South"    34:55 S  138:36 E

... Don't resent growing old. It's better than the alternative.
___ Blue Wave/386 v2.30

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