29 Apr
2014
29 Apr
'14
11:23 a.m.
From: Pontus Pihlgren
Sent: Tuesday, April 29, 2014 12:20 AM
On Mon, Apr 28, 2014 at 04:06:40PM -0600, Eric Smith
wrote:
> Compuserve replaced their power supplies with
switchers, but I've never
> found any information on the models/specifications/performance.
Mike Ross had a 2065 with a switcher installed. I
think that one went to
the living computer museum,
The switchers in the 1095 (hey, it's painted blue, not orange) are about 70%
efficient. The entire system is powered on a 20A @ 220VAC (3ph) circuit,
rather than the 60A @ 220VAC (3ph) circuit required by our 2065. More modern
PSUs (these are about 20 years old) would be even better--the ones we use in
the PDP-7 and KI-10 are about 90% efficient.
maybe Ian can provide some insight.
Actually, Ian wasn't yet working for the museum when I bought Mike's KL-10,
and he never worked on it while he was here. He left several months ago,
and we miss him.
Best,
Rich
Rich Alderson
Vintage Computing Sr. Systems Engineer
Living Computer Museum
2245 1st Avenue S
Seattle, WA 98134
mailto:RichA at LivingComputerMuseum.org
http://www.LivingComputerMuseum.org/