On 2018-05-01, ray carter  wrote:

> On Mon, 30 Apr 2018 15:30:30 +0100, Gareth's Downstairs Computer wrote:
>
>> These have an RPi behind them ...
>>
>> http://obsolescence.wixsite.com/obsolescence/pidp-8
>>
>> http://obsolescence.wixsite.com/obsolescence/pidp-11
>
> Ah, yes - I remember it well. One of my memories was that the 11/70 had
> to be taken down and all the cards reseated weekly to keep it running
> reliably.

We had terminals that were like that.  The board contacts weren't
gold-plated.

One computer was in a tiny room with a huge air conditioner, and
they shut it down every night.  It was quite flaky.  One day a CE
pulled a board to re-seat it, and one of its VLSI chips fell right
out.  The thermal cycling from the daily startup and shutdown of
both the machine and the air conditioner had caused the chip to
literally walk out of its socket.  We got the customer to leave
everything on 24/7, and the problems went away.

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