"CJ" wrote in message news:O_VOd.2203$yr.689@okepread05...
That is a very nice book to understand. I guess what I should have asked
is
on what application would you use a PNP and when would you use an NPN? I
understand how they work. I just don't understand how you know which one
to
use.

Thanks


They are bias differently..
The one you use depends on what power supplies you have available.
There are also many tricks connecting PNP and NPN together to accomplish
circuitry not possible with vacuum tubes.