unibus backplane list?

[Jay West]

Someone wrote....
>>>>> My 11/44 has a DD11-DF in it which is impossible to get cards into and
>>>>> out of.  It's like something is physcally wrong with it.  Rather than
>>>>> damage any cards I thought I'd replace it.
That's not totally uncommon, many of my DEC machines exhibit this even after 
much care in the backplane restoration. Non-Hex Unibus cards also seem to 
rock back and forth slightly in the slots, something I think is not good 
design.

Someone else wrote...
>>>   I've had similar trouble with the HP 1000 boards.
Now that's unusual, at least to me. There's been quite a large number of HP 
1000's make it in and out of my place. I can only think of one or two that 
had problems like this and the problem was normally 3rd party cards.

> I found that if I
>>>clean the edge connectors and them wipe them with a rag slightly dampened
>>>with WD-40 (mostly kerosene, a light oil) that the cards go in and out 
>>>much
>>>easier and I have a lot less intermitant contacts. I believe the oil
>>>coating also helps reduce oxidation of the contacts.
Ugg... I wouldn't suggest WD-40. It's not helpful to some other things 
commonly on circuit cards.

Please please please buy a can of Caig Pro-Gold for use on gold edge cards 
and directly on gold pin backplanes. I promise you'll be extremely happy 
with the results which are both instantaneous, extremely effective, and last 
a long long time.

Jay West