[sdiy] 2sd1293m replacement?

[Gordon JC Pearce]

On Tue, 6 Sep 2011 01:05:49 -0500
James Coplin <james at ticalun.net> wrote:

> Transistors are one of those things that I have to admit just flummox me.
> I am in need of a pair of these now obsolete transistors to repair the
> display board on a MKS70.  I can't believe there isn't a suitable
> replacement part out there.  Anyone happen to know or can tell me the
> rules for selecting a suitable replacement?  This is a regularly recurring
> problem for me lately.  It seems there are just thousands of these things
> - do we need so many?  Are there really that many variations?  How do you
> know which to use and sub?

What does it actually do?  Why is it so special?  Looking at the datasheet it appears to be a smallish 1W NPN tranny.  Have you considered something like a ZTX650?  That would be my first choice, since I've got a bunch of them...

-- 
Gordon JC Pearce MM0YEQ <gordonjcp at gjcp.net>