PDP-11 power requirements
ggs at shiresoft.com
Thu Feb 5 12:24:46 CST 2009
It all depends upon how it's packaged (ie racked) and if it's a unibus
or Q-bus machine. With the smaller Q-bus machines (not in a rack) can
plug directly into your standard 15A wall socket.
If it's in a rack, it will depend upon the power controller that's
installed in the rack. AFAIK (in the US at least), there are no 220v
power controllers. You'll have either a 120v at 30A power controller or
a 3-phase power controller (but that's likely to be only for the
largest 11's - like an 11/70). Most everything else is single phase.
The single phase power controllers use a "twist lock" 30A plug. You
*can* re-wire the end to use a standard 3-prong plug. But (a) it's
not code, (b) it's not code, (c) it's not code, (d) the weight of the
power cable will tend to pull it out of the wall socket. Oh and did I
mention it's not code?
Whatever you do *don't* plug it into the dryer socket. You'll be
TTFN - Guy
On Feb 5, 2009, at 10:11 AM, John Floren wrote:
> I may soon be acquiring a PDP-11; I do not know the exact model. My
> question is, what kind of power supply might this require? It sounds
> like some can use 110V and others require 220? Are there models that I
> can just plug into my apartment's wall socket, or do I need to get an
> extension cord from the washer/dryer socket (which is not in use right
> If anyone can summarize what models need what sort of power, I'd
> appreciate it.
> "I've tried programming Ruby on Rails, following TechCrunch in my RSS
> reader, and drinking absinthe. It doesn't work. I'm going back to C,
> Hunter S. Thompson, and cheap whiskey." -- Ted Dziuba
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