8 Feb
2016
8 Feb
'16
5:20 a.m.
Until one can restore the original power supply, it is pretty easy to
substitute a modern supply, good quality used commercial grade switchers
with remote sensing can but put on a rack shelf. But if you take that
route, be very very careful of Chinese supplies.
On Sun, Feb 7, 2016 at 1:24 PM, Robert Jarratt <robert.jarratt at ntlworld.com>
wrote:
-----Original Message-----
From: cctech [mailto:cctech-bounces at classiccmp.org] On Behalf Of Jos
Dreesen
Sent: 07 February 2016 17:55
To: classiccmp at classiccmp.org
Subject: The PDP11/04 has landed..
Yesterday I picked up the PDP11/04 that Jay mentioned a few days ago.
Less than 15 miles from home !
The machine spend its early days as a processor in chemical analysis
apparatus, and was subsequently bought by the employee using it.
Before he could make use of it better, more powerful, easier to use
machines came along and the -11 spend the next 30 years in a garage.
The -04 is an entry level machine, and the cards inside match this :
M7263 KD11 CPU
2 x M7264 16K DRAM cards
M7856 DL11 SLU/RTC
M7846 RX01 controller
2 x M7814 DZ11-F
and of course the M9301, M9302 and M9202.
Alas it has just the simple 2-switch frontpanel.
The machine also had the battery backup option, and the lead/acid
batteries
will celebrate their 40th birthday next year !
Better not try to charge them....
Overall the machine is in very good condition, both CPU and RX01, and it
is
packed in a very nice half-height rack with the
red PDP11 bezel at the
top.
Pictures next week when the machine is cleaned
and reassembled,
restoration is to start next winter, after a house move which will nearly
double working area for the hobby.
Many thanks to Roland for preserving the machine, and to Jay for acting
as an
interface !
I have one of these on my restoration list. I know the PSU does not work,
and that others have tried to fix it before me, who probably know PSUs much
better than I do. It has core memory so I really would like to get his one
fixed. I have never seen a PSU for it come available in the UK or Europe,
so it looks like it won't be an easy job. :-(
Regards
Rob