S-100 Power Supplies: thanks! - test-drb@ccmp.vtda.org

28 Aug 2001

Rich,

If you need a S100 PS I have one free for picking up.  That
transformer is far to heavy to ship.  FYI this one has the regulators
for 8" drives.

Allison

-----Original Message-----
From: Rich Beaudry &lt;r_beaudry(a)hotmail.com&gt;
To: classiccmp(a)classiccmp.org &lt;classiccmp(a)classiccmp.org&gt;
Date: Tuesday, August 28, 2001 10:06 AM
Subject: S-100 Power Supplies: thanks!

...
 Hello all,

Thanks to all those who replied to my message regarding S-100 power
supplies, and thanks especially to Dick Erlacher, who offered to sell me
some cheap.  I got a private email reply from someone offering the same
thing, and I took him up on it first.  So to Dick, I'll pass but thanks
anyway...

The main problem in all of this was not ever the design.  As Allison pointed
...
 out, an unregulated supply is dead simple to design. 
Even looking at some
...
 commercially designed/built S-100 supplies, you can see
it's not rocket
science.  The problem nowadays is finding one part -- the transformer. Most
...
 all computers are +5V, +/-12V now, and of course
transformer manufacturers
...
 gear towards those.  Even some of the surplus places
I've gone to on the web
...
 only have "common" voltages (+5V, +/- 12V,
+24V, etc).  That's why I wanted
...
 to see if there was an SMPS that would do the trick. 
After looking at SMPS
...
 prices, however, I've decided no to go that route. 
I'm sure they're
bullet-proof, and would function admirably, but I'm not going to plunk down
...
 $200+ for one :-) (remember, we're talking high
current here, not just the
...
 little 1A switcher).

Anyway, thanks to all ...

Rich B.