PDP-11 power requirements

Paul Koning Paul_Koning at Dell.com
Thu Feb 5 15:19:08 CST 2009


>>>>> "Ethan" == Ethan Dicks <ethan.dicks at gmail.com> writes:

 Ethan> On Thu, Feb 5, 2009 at 1:47 PM, <tiggerlasv at aim.com> wrote:
 >> 
 >> 
 >> I can't speak towards the older, larger Unibus models, such as the
 >> 11/45, 11/55, 11/60, and 11/70.
 >> 
 >> However, these models generally had a standard 115volt line cord:
 >> 
 >> 
 >> 11/02 11/03 11/23 11/23+ 11/24 11/34 11/34a 11/44 11/53 11/73
 >> 11/83 11/84 11/93 11/94
 >> 
 >> If it's in a rack, it MAY have a power distribution module at the
 >> base, with a 20-amp or 30-amp power cord, but in most (if not all)
 >> cases, the individual chassis inside the rack will have standard
 >> 115volt line cords that plug into it.

 Ethan> My Unibus machines are racked, not loose, but I _thought_ that
 Ethan> the 11/44 and perhaps the 11/24 had a 20A 115V plug (i.e.  --
 Ethan> | vs | | ).  Mine go into a power distribution box at the
 Ethan> bottom of the rack and I haven't unplugged them in a long
 Ethan> time, but that's what I recall.

If the particular config isn't too powerhungry you could replace the
plug and plug it into a 15 amp circuit.

     paul




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