[sdiy] Mystery transistor--help!

[Roy J. Tellason]

On Monday 27 June 2005 04:09 pm, Glen wrote:
> At 01:25 PM 6/27/2005, Bob Weigel wrote:
> >It definitely would be a morotorola number.  Actually I have stock of
> >several from the MPS-Uxx series.  25 is not only one I don't have...it's
> >not even listed in the master motorola guide from 5 years ago at least.
> >Sure you are reading that right?  Also..the MPS-Uxx ones I have AND that
> >are listed all come in a small power tab case; designed for power
> >applications like driver transistors in low power amplifiers and that sort
> >of thing..   -Bob
>
> I have an older Motorola book from 1984 and it doesn't show up in that book
> either. (I thought you might have had an old part that was dropped from
> Bob's version of the book.) Like Bob said, there are numbers in the book on
> either side of "25", but that won't help you. All the similar numbers that
> I found were also power devices with a metal tab.

Same here,  except that the Master Selection Guide I looked in is dated 
December 1971!  I've got such numbers on hand as MPSU05/55 (complementary 
pair) and yes,  they're medium-power devices with a tab sticking out.  Not 
very hefty,  though,  and I can't say I've seen much else that used that 
package.

So darn many numbers...

(I see that the "CC" list is getting quite long.  Please don't CC me offlist 
with further replies to this thread!  :-)