Well,
It finally is there, my own PDP 11/70, in working condition and with
1Mb in the memory box. The machine is placed in 1 H960 cabinet and
has the original 11/70 top faceplate.
I picked it up last Friday in the UK near London, and the whole
trip did take 23 hours, including 2 two hour ferry trips.
With it I got the documentation, engineering diagrams and a complete
set of spare cpu boards.
Although the machine is is working conditions, I will of course go
through the (unpublished) list of steps before I apply the power
to the backplane.
Since the two bulk supplies are having 8 H744's (25A versions) I was
just wondering about the feasebility of replacing them with standard
PC XT power supplies (just for the 5V), as the usually deliver also
between 25A and 30A, depending on the model. The large transformer in
the bulk supply will then be replaced with a smaller transformer to
deliver the LTC, DCLO, ACLO and +15V via the power monitor module
which is still there.
Since I'm not going to use MASSBUS devices, two modules could be
removed as they power a part of the MASSBUS backplane section.
Of course, all the pins of the backplane will be checked and
straightened if needed, and the card connectors will be vacumed before
replacing the cards.
Any other tips I may need?
Ed
--
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Received on Tue Jul 31 2001 - 14:00:01 BST