> I just a couple of days ago picked up a VAX 11/750. This machine has
Cool!
> been stored
> in a damp shed for ten years or so, has had mice living in it, and the
> usual assortment of spiders, etc.
Oh, SHUDDER! It sounds like you're in for an interesting restoration
process.
> to the control panel and TU58 tape drive. I'm in the process of cleaning
> all the components,
> but am in search of some advice on this process, especially the power
> supply. How long
> should I let the power supply dry out from its prior damp condition, and
> what should
> I do to bring it up for testing without risking damage to other
> components? I wish to
> do this methodically and carefully.
Unless this is a powersupply that needs a load on it when you power it on
(anyone know?), I'd recommend having it totally disconnected when you power
it on. I'd also recommend you have someone else standing by with a C02 Fire
Extinguisher for safety.
As for how long it needs to dry before powering up, I'm not really sure, if
you've got it in a warm, heated location, I'd say a week or two should be
plenty (probably doesn't need that much but it's better to ere on the side
of caution).
Something to do in the mean time is to look for corrosion and to get
everything good and clean. I'm most concerned about your powersupply and
backplane. Also take a look at the rollers in your TU58. While the
following is for a PDP-8, you might find it useful.
http://pdp-8.org/revive.htm Definitly read up on what Aaron has to say
about Backplanes.
Zane
Received on Tue Oct 29 2002 - 22:33:00 GMT