"Radiosrfun" wrote in message
...
"COLIN LAMB" wrote in message
ink.net...
Switching diodes are generally non-critical. After all, there are only
two
states - on or off. Normally, substituting any other switching diode
will be
fine.

Colin K7FM




While I know this to be true - and agree with you 100% - I always try to
get a sub number as a matter of principle. Amazing - all the resources for
parts that I have online have "nothing found" - listed. I've got quite a
few older crosses also, and again - nada. Yes - a couple "surplus sellers"
who supposedly deal in obsolete parts and sell them for $100 each or
more - claim to have them.

I tried ECG (I know they were acquired), NTE, Fairchild - who I believe
this came from, and so many others who had "parts cross references" on
their sites. NADA......... There were some "almost" close hits - but no
bulls eye. I must now wonder if this number was a "misprint" OR an in
house number. The latter would be strange because the radio used other
parts - very easily crossed.

Yes, most definately - I've created more work than what it is worth - but
why - is because as we know - some ICs and Transistor numbers get changed
over time and if some sort of record can be kept - it makes life a lot
simpler. TOO often - I have seen people asking for crosses for parts -
some rescued by an answer - some not.
I - like others - have been able to take an old transistor number - no
longer used - part perhaps not even made - and been able to get the specs
on that part and acquire a part with similar enough characteristics to
make it work. So - as a matter of principle - I try to do that with any
"off the wall" number such as this part - that I find. Who knows, some day
someone else may need a number "I" have crossed and I can help them!
It sure makes life easier........

Funny though - in my haste to type a post for finding said cross, I
mentioned it to be a switching transistor - which brought question of my
knowing a transistor from a diode. I had meant to say the "diode" was a
"Switching Diode" - used to switch a transistor on/off.

I've got a drawer full of switching diodes here and when I get time, will
slap one in and the problem will be solved.

Again, in haste - I had forgotten to thank you for your input...........

THANKS!