18 Jun
2014
18 Jun
'14
2:04 p.m.
* Paul Koning <paulkoning at comcast.net> [140618 16:37]:
On Jun 18, 2014, at 4:23 PM, Todd Goodman <tsg at bonedaddy.net> wrote:
Thanks Paul!
Todd
Hi,
I've just built a new building that will be part machine shop and part vintage
computer display area (and workshop for repair, etc.)
I'm trying to size power requirements and AC requirements.
I know that without specifics as to exactly what I'll be running (and
all the options) then it's really hard to come up with anything.
At the same time I need to decide and get the building wired up and the
cooling set up.
I have a number of different racks of PDP-8 and PDP-11 equipment along
with other more personal sized computers.
Obviously not all will be powered up at once, but I'd like to spec out
requirements so that I can at least run a few at a time.
A lot of those machines run on plain office wall power, i.e., 15 amp 115 volt outlets in
the USA, or < 10 amps in 220 volt countries.
Likewise with the AC. I'd like enough AC to be able to run for as long
as I want without overheating the equipment or myself (and I overheat
easily.)
Sizing AC is easy. All the electric power you feed to your computer turns to heat.
(Well, a trifling fraction might go elsewhere, like the transmit power to your ISP.) So
whatever your AC capacity is, you need to be able to get rid of that quantity of heat. In
metric this is easy; in funny units you?ll have to find the conversion from watt to BTU or
whatever.
paul