Latest addition : PDP 11/70

From: Doug Carman <pdp11_at_bellsouth.net>
Date: Tue Jul 31 15:07:57 2001

wanderer wrote:

> The whole 11/70 consumes about 2 kilowatt of power, no problem for me.

Here are the measurements from my own system I made a while back. Since
I am in the U.S., this is a 110 volt configuration.

System configuration:

PDP-11/70 CPU KB11-C w/FP11-C, 0 RH70's, 1 DL11W, 1 RX211
MK11 1024KW
BA11 w/1 DZ11, 1 RL11, 1 KLESI, 1 DELUA, 1 UDA50
RX02
SA72 w/4 RA72
RL02
TU81+
LA120

The entire system is fed with a single 220V 30A circuit which is split
into two 110V 30A circuits through an 861-D power controller.
Configuration Run current Peak Current
                        L1 L2 L1 L2
CPU only 5.8A 5.2A 6.2A 5.7A
CPU+MK11 5.8A 8.9A 6.2A 10.5A
CPU+MK11+BA11 9.9A 8.9A 14.7A 10.5A
Full load at idle 12.1A 14.1A 17.4A 17.5A
Full load with all 12.2A 15.4A
disks spun up, tape
loading, CPU running
EMKA diag.

The total current draw would be the sum of the values from L1 and L2.

These are observed values from my own system. Your system will never be
exactly the same as mine. Don't under-estimate the AC circuits to the
equipment.

-- 
Doug Carman
pdp11_at_bellsouth.net
Received on Tue Jul 31 2001 - 15:07:57 BST

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