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From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Re: Computer DC supplier
References: <firstname.lastname@example.org> <3DAAFC5B.A19C6B38@webaccess.net>
Date: Thu, 17 Oct 2002 00:25:28 GMT
NNTP-Posting-Date: Wed, 16 Oct 2002 17:25:28 PDT
"Michael J. Sch=FClke" wrote:
> Chuck Simmons wrote:
> > I have yet to see one of these supplies with the 12 volts within
> > specification. If you use 12 volts for anything, consider that the po=
> > supply may put out anything from 11 to 14 volts. Most likely seems to=
> > 11.5 volts.
> ... which is completely within specification. ATX power supply voltages=
> are spec'ed +/- 5% on positive outputs, +/- 10% on negative outputs, so=
> everything between 11.4 V and 12.6 V is perfectly fine. Check section
> 3.2.1 of the ATX Power Supply Design Guide,
We've had them here anywhere from +8 to +14. Reliability is low when
cycled a lot. We throw away a couple per week. Virtually all on-off
switch failures and a smattering of undervoltage flops. That's lousy
reliability considering we never have more than five in use at a time.
Since we get them essentially free, we trash any that are suspect. We
have found that the very old power supplies are vastly better than new
ones but the old ones cost money so we only have a couple of them.
There is nothing like a good power supply when you are doing development
work and PC power supplies are nothing like it.
... The times have been, =
That, when the brains were out, =
the man would die. ... Macbeth =
Chuck Simmons email@example.com
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