25 Aug
2014
25 Aug
'14
7:04 p.m.
That has been my experience as well. I know it was something simple mounted
in a bracket that could be installed in place of the HDD. It would be nice
to know what they used just for the historical aspect of it if nothing else.
I would assume it was designed to operate for prolonged periods (i.e. as
long as the computer was on) so it must have had some sort of (passive)
cooling as well.
-----Original Message-----
From: Tony Duell [mailto:ard at p850ug1.demon.co.uk]
Sent: Monday, August 25, 2014 1:17 PM
To: cctalk at classiccmp.org
Subject: Re: Test Loads for Power Supplies
Anyone know what the original IBM PC AT Load was made of/from? This
was for the models w/out a HDD which I believe were far and in between
so there aren't too many of them around....
It gets a beif mention (with no description) in the HMS manual, but nothign
i nthe TechRef :-(
From what I can deduce it was a simple load resistor on
the +12V (not
+5V)
line. That is a resistor wired to a 4 pin disk drive power plug (to conenct
to the hard drive power cable) between the +12V pin and one of the ground
pins. I do not know the value of the resistor, that is not in any of the
manuals I've seen.
-tony