"Chris F." wrote in message
...
Is it possible to substitute a Darlington transistor with a non-Darlington
one? I'm working on a Kenwood amp, it had blown the output transistors
2SD2222 and 2SB1470. I ordered some new replacements and installed them,
one channel worked but the other blew right out again. Having spent $45 on
this amp so far including a service manual, I don't want to gamble any
more money on it. So I was wondering if I can replace those transistors
with some non-Darlington ones I already have. The packages and electrical
characteristics are very similar, but of course this sounds just a bit too
easy.
Thanks for any advice.

--

You're right ! It *is* too easy ... Darlingtons cannot be replaced with
non-Darlingtons, because of the hugely different gain characteristics, which
leads to the requirement for an utterly different bias regime. Also,
substituting almost *any* component in a DC coupled amp, is a recipe for
disaster, and in particular, with a Kenwood ... Sorry ...

Arfa