18 Apr
2007
18 Apr
'07
6:55 p.m.
Van: cctalk-bounces at classiccmp.org namens John A. Dundas III
Verzonden: di 17-04-2007 22:16
Aan: cctalk at classiccmp.org
Onderwerp: Re: PDP-11/34 filter and cable routing questions
Henk and Jay,
Thanks for your comments. It's odd that this isn't in any of the
FMPS anywhere (that I have seen). I can't help but think there must
have been some Field Service maintenance procedure (and thus
document) or training document somewhere that addresses this. I
would imagine this was a typical PM checklist item.
OK, so the filter OUTSIDE of the velcro, between the panels and the
box frame, makes sense. You can see on mine that there are 4 velco
strips. I don't see any evidence of a retaining bar, as Jay
mentioned, though that makes sense.
[...snip...]
I can't use the condition I found this in to determine if the filter
was half height (Henk's case) or full height (Jay's).
I agree that the filter doesn't seem to actually do much. Especially
in my case where I don't have a top to close the box anyway. I'm
just seeing how close I can get to factory-fresh conditions.
Thanks for all the comments.
John
I stand corrected. Jay is correct, the foam is over the full height!
I removed the front panel of the 11/34C to shoot the pictures that
I promised a few days ago. First, there are not 2 but 3 cables,
but more "important", the filter foam is *not* just on the upper
half of the front of a BA11-K box, but on the full front of the box!
Now, in my box there is no foam, but the black plastic with the
small "hooks" is glued over the full height of the front, as you can
see on the second picture. Also, my ASCII art drawing has just one
vertical piece of metal on the front, but there are actually two.
Bad sector in my head, I guess :-)
Note, picture #1 is 512 kB, and picture #2 is 406 kB.
http://www.pdp-11.nl/pdp11-34a/11-34-console-wiring-1.jpg
<http://www.pdp-11.nl/pdp11-34a/11-34-console-wiring-1.jpg>
http://www.pdp-11.nl/pdp11-34a/11-34-console-wiring-2.jpg
<http://www.pdp-11.nl/pdp11-34a/11-34-console-wiring-2.jpg>
Grab them while you can, I will remove them this weekend!
- Henk, PA8PDP.
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