Acquired a PDP11/44, but missing M7095

From: John Lawson <jpl15_at_panix.com>
Date: Wed Dec 11 17:34:01 2002

On Wed, 11 Dec 2002, Zane H. Healy wrote:

> > didn't go any further. Also, while the power supply is configured for
> > 120VAC it has the high current (20A) plug with one of the lugs rotated 90
> > degress and I don't think I have any compatible outlets in my house so that
> > is yet another challege to solve.
>
> You should, with a properly constructed extension cable, be able to run it
> off of your dryer circuit.


<sellam_mode>

    Jesus H Kraist!!!!! Zane, you need to stick with shit you know about,
and leave the electrical advice to folks who understand the difference
between voltage and current.


   DO NOT plug your 120v PDP11 into a 220V Dryer Outlet!!!!!

   DO NOT plug your 120v PDP11 into a 220V Dryer Outlet!!!!!

   (repeat this until it sinks in!)



> My PDP-11/44 is in my parents Garage, and that's
> how it gets it's power. That's enough to power the CPU, two RL02's and some
> other stuff.

  Most likely your system is configured for 220VAC operation, by use of
the switches on the backs of the various units - or, what is less likely,
is that your folks have a 120V dryer...


  BUT There is a huge difference between 'enough power' and 'correct
voltage'!!! and I don't get the sense that your "advice" discriminates
between the two....

> Looking at the CPU manual you should be able to get a rough
> idea of how much current the system will really draw.
>

   No, not really! Having the docs on all installed cards, and adding up
the current draws for +5 and +12 in amps, will give you a rough idea of
what the 11/44 mains draw will be, IF you can translate what the
power supply will draw from the mains given that particular load.


  PEOPLE: *Please* check your facts before giving advice about
potentially disastrous hook-ups like this!!!!


   This is a good way to permanently fry someone else's vintage hardware,
and it's certainly one of the drawbacks of a forum where people's opinons
might be taken as gospel when, in fact, the opinions are worth what one
pays for them...



  DO NOT HOOK YOUR 120V PDP11 INTO A 220V DRYER OUTLET!!!!!

 </sellam_mode>


  I'm scared now...


  John
Received on Wed Dec 11 2002 - 17:34:01 GMT