5 Feb
2009
5 Feb
'09
10:47 a.m.
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
(Sorry in advance, if I left anyone's model off the list.) ;-)
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.
T
5 Feb
5 Feb
11:28 a.m.
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.
My Unibus machines are racked, not loose, but I _thought_ that the
11/44 and perhaps the 11/24 had a 20A 115V plug (i.e. -- | vs |
| ). Mine go into a power distribution box at the bottom of the rack
and I haven't unplugged them in a long time, but that's what I recall.
Little stuff like the 11/34 and 11/04 in BA-11s use "standard" US 15A
110V plugs, though, as would anything in a BA23 (Qbus, large and
small). I don't know anything about the newer stuff after the 11/73,
though.
-ethan
1:19 p.m.
>>>> "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
1:31 p.m.
On Thu, Feb 5, 2009 at 4:19 PM, Paul Koning <Paul_Koning at dell.com> wrote:
One could probably get away with that, but personally I'd prefer a 20A
circuit - the outlets are only a few bucks, but what might cost you is
the heavier wiring (12/2?) between the panel and the outlet.
Thinking further, I'm not as sure the 11/44 has a 20A plug, but I'm
more certain that the BA32 box that holds the CPU for my VAX8200 _is_
20A. I am not totally certain because I just slapped a 30A Hubbel
twist outlet on the side of my breaker box and swapped out the
breakers for the stove (I have a gas stove) for a pair of 110V
breakers - one powers the VAX. Since the wire run is from the breaker
to 6" away, there wasn't a lot of expense for heavy gauge wire.
I've since used that 30A outlet for an Alpha machine (medium sized,
one of the Futurebus+ models) as well as the 8200. It's rather handy
to have in the basement. It certainly would power any of the smaller
PDP-11s I have including a disk or two. Right now, my hungriest disks
are an RA81 and a Fuji Eagle (but only the RA81 is in that basement)
I spin up the RA81 first, let it settle, _then_ power on the VAX. I'd
love to find a VAXBI SCSI card, but such things were not cheap in the
day and I can't imagine they sold in very great numbers.
-ethan
>>>> "Ethan" == Ethan Dicks <ethan.dicks at gmail.com> writes:
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. 
2:15 p.m.
On Thu, Feb 5, 2009 at 1:31 PM, Ethan Dicks <ethan.dicks at gmail.com> wrote:
Thinking further, I'm not as sure the 11/44 has a 20A plug
The 11/44 I had did have a 20A plug. I replaced the outlet in the
wall instead of replacing the power cable on the 11/44.
(I sold that 11/44 to Guy a couple years back).
-Glen
2:23 p.m.
Just to pile on: my 11/44 has a 'regular' 115v plug. It looks old and decrepit
enough to be stock. :-) -- Ian
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org] On Behalf
Of Glen Slick
Sent: Thursday, February 05, 2009 2:16 PM
To: General Discussion: On-Topic Posts Only
Subject: Re: PDP-11 power requirements
On Thu, Feb 5, 2009 at 1:31 PM, Ethan Dicks <ethan.dicks at gmail.com> wrote:
Thinking further, I'm not as sure the 11/44 has a 20A plug
The 11/44 I had did have a 20A plug. I replaced the outlet in the
wall instead of replacing the power cable on the 11/44.
(I sold that 11/44 to Guy a couple years back).
-Glen
1:24 p.m.
Ethan Dicks wrote:
On Thu, Feb 5, 2009 at 1:47 PM, <tiggerlasv at
aim.com> wrote:
Anything in a BA11, BA23, BA123, BA213 are 110V at 15a or 220-240 at 7A
requirement though most had cord sets for local power. for USA that meant
15A outlet. Most all Qbus fits that (exception was a 48V DC flavor for
telco).
The larger set of PDP11 were 15A or could run on 15a (plug change) as
only the monsters drew full requirement.
I ran a 11/730 two cab (730, RA81 and two RL02) on 15A in the lab for years.
Even though the book says 30A outlet.
Allison
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.
My Unibus machines are racked, not loose, but I _thought_ that the
11/44 and perhaps the 11/24 had a 20A 115V plug (i.e. -- | vs |
| ). Mine go into a power distribution box at the bottom of the rack
and I haven't unplugged them in a long time, but that's what I recall.
Little stuff like the 11/34 and 11/04 in BA-11s use "standard" US 15A
110V plugs, though, as would anything in a BA23 (Qbus, large and
small). I don't know anything about the newer stuff after the 11/73,
though.
-ethan
6 Feb
6 Feb
2:14 a.m.
On Thu, 5 Feb 2009 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.
11/[45][05] use standard line cords.
However, these models generally had a standard 115volt
line cord:
That would mean that all my machines will die due to overvoltage ;-)
Christian
8:50 a.m.
On Feb 6, 2009, at 2:14 AM, Christian Corti wrote:
On Thu, 5 Feb 2009 tiggerlasv at aim.com wrote:
Yes, but you needed multiples. That is, the CPUs have 2 H720 power
supplies.
TTFN - Guy
I can't speak towards the older, larger
Unibus models,
such as the 11/45, 11/55, 11/60, and 11/70.
11/[45][05] use standard line cords.
5798
days inactive
5799
days old
8 comments
8 participants
participants (8)
-
ajp166＠verizon.net -
cc＠informatik.uni-stuttgart.de -
ethan.dicks＠gmail.com -
ggs＠shiresoft.com -
glen.slick＠gmail.com -
IanK＠vulcan.com -
Paul_Koning＠Dell.com -
tiggerlasv＠aim.com