Date: Wed, 23 Jan 2008 18:28:57 -0500
From: mloewen at cpumagic.scol.pa.us
To: cctalk at
classiccmp.org
Subject: Re: Need 28VDC 4Amp PS...
On Wed, Jan 23, 2008 at 04:52:23PM -0500, Bill Sudbrink wrote:
I'm fixing a PowerMac G4 for my Dad's
wife. The original PS is dead.
It was a pretty standard ATX supply, the only difference is that it
supplies 28VDC at 4 Amps on two extra pins. Rather than spending a
lot of money on a new supply (more than $250 from the few sources that
will guarantee the PS) or a not insignificant amount on a used PS that
could go at any time, I want to put in a new standard ATX supply and
"tuck in" a small 28VDC PS to drive the two extra pins. The supply
is always on, so I can power it from a pass through on the ATX supply.
Does anyone have (or know where to get) a small supply?
Bill:
I don't know how solid your current requirement is, but here's one for
28VDC at 2A:
http://www.mpja.com/prodinfo.asp?number=17186+PS
Hi
Most of the independent supplies have enough adjustment to
go from 24 to 28 volts. The only thing to watch out for is an OVP. Even
so, many of these are also adjustable. If it has no OVP, it will
most likely adjust to 28 without problems.
Dwight
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