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From: clf3678@isc.rit.edu (C.L. Freemesser)
Newsgroups: comp.sys.atari.st.tech
Subject: Re: 520 ST power supply
Summary: Build your own power supply
Message-ID: <1991May1.010132.12287@isc.rit.edu>
Date: 1 May 91 01:01:32 GMT
References: <1991Apr30.021744.1728@nmt.edu>
Organization: Rochester Institute of Technology
Lines: 34

In article <1991Apr30.021744.1728@nmt.edu>, jcksnsr@nmt.edu (JC) writes:
> 
[Story about Jeff's cheap Atari power supply blow up deleted]

>    So the question comes down to this, 1) Does anyone know what the specs
> on the tranformer are and how it is wired so I can replace it myself (unlike
> the diodes the transformer is completely void of useful identifications) and
> 2) if not anyone know where to get a 520ST power supply cheaply and quickly.
> 
> JEff

Although my original 520ST power supply hasn't failed, I replaced it
with a heavy duty (about 70W) Lambda power supply.  Hooking up a
"generic" power supply isn't hard at all.  The ST uses +12, -12, and
+5VDC, as well as a few grounds.  All "IBM" type supplies, and many 
of the "generic" power supplies have these voltages available.  I just
bought the power connector at Radio Shack, grabbed some 6 or 7 conductor
wire I had, and hooked it up.  Works great, and I never have to worry
about not having enough power for future expansions, or whether or not
the supply will last.  

Since I use a "generic" floppy drive instead of an Atari drive, I also
power that off of the Lambda supply.  I bought another supply for my
hard drive (70W isn't enough for everything), but two supplies is better
than a floor-full of black bricks.



___________________________________________________________________________
_____\ Chris Freemesser, RIT Comp.Eng.Tech.      Dimension's End BBS /_____
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