9 Mar
2016
9 Mar
'16
11:51 a.m.
Has anyone ever reproduced the card guides used in the 8/A chassis? I
assume these are identical to those used in PDP-11s as well. My are beyond
brittle.
Thanks,
Marc
9 Mar
9 Mar
12:20 p.m.
-----Oorspronkelijk bericht-----
From: Marc Howard
Sent: Wednesday, March 09, 2016 8:51 PM
To: General Discussion: On-Topic Posts Only
Subject: Speaking of card cages...
Has anyone ever reproduced the card guides used in the 8/A chassis? I
assume these are identical to those used in PDP-11s as well. My are beyond
brittle.
Thanks,
Marc
---------
Marc,
do you have pictures? I googled but get different guides.
Are they small, like 5mm, and colored maroon or white?
Those are also used in the 11/44 box and expansion boxes,
I guess every BA11-K.
The BA11-L has white hard"plastic" blocks some 2" long
and has slits for 4 boards.
So, a picture or description would be helpful.
- Henk, PA8PDP
3:11 p.m.
On 3/9/2016 12:20 PM, Henk Gooijen wrote:
-----Oorspronkelijk bericht----- From: Marc Howard
Sent: Wednesday,
March 09, 2016 8:51 PM To: General Discussion: On-Topic Posts Only
Subject: Speaking of card cages...
Has anyone ever reproduced the card guides used in the 8/A chassis? I
assume these are identical to those used in PDP-11s as well. My are
beyond
brittle.
Thanks,
Marc
---------
Marc,
do you have pictures?
Here is a photo of one of the sides of the 8/A (which I will
have to try
to straighten). It is one of the strips of vertical bands with round
card guides standing off for the cards to slide between.
This is a 8/A 400 cage. The larger 8A 600 and larger cage may have
different guides. A friend has one of those and I will get him to
photograph it.
http://jimsoldtoys.blogspot.com/search/label/PDP8A
Thanks
Jim
I googled but get different guides.
Are they small, like 5mm, and colored maroon or white?
Those are also used in the 11/44 box and expansion boxes,
I guess every BA11-K.
The BA11-L has white hard"plastic" blocks some 2" long
and has slits for 4 boards.
So, a picture or description would be helpful.
- Henk, PA8PDP
11:49 p.m.
On 3/9/2016 3:11 PM, jwsmobile wrote:
On 3/9/2016 12:20 PM, Henk Gooijen wrote:
>
<snip>
Here is a photo of a PDP 8/A 620 with the style of card guides that
Vince is referring to: (I think)
http://www.oldcomputers.arcula.co.uk/files/images/pdp8408.jpg
Different than the 8/A 400.
Here is a very clear photo of the card guides and cage for that beast.
http://www.retrotechnology.com/restore/8a_1sttest_trans.jpg
Thanks
Jim
do you have
pictures?
Here is a photo of one of the sides of the 8/A (which I will have to
try to straighten). It is one of the strips of vertical bands with
round card guides standing off for the cards to slide between.
This is a 8/A 400 cage. The larger 8A 600 and larger cage may have
different guides. A friend has one of those and I will get him to
photograph it.
http://jimsoldtoys.blogspot.com/search/label/PDP8A
Thanks
Jim
I googled but get different guides.
Are they small, like 5mm, and colored maroon or white?
Those are also used in the 11/44 box and expansion boxes,
I guess every BA11-K.
The BA11-L has white hard"plastic" blocks some 2" long
and has slits for 4 boards.
So, a picture or description would be helpful.
- Henk, PA8PDP
10 Mar
10 Mar
12:35 a.m.
From: jwsmobile: Wednesday, March 09, 2016 11:49 PM
Here is a photo of a PDP 8/A 620 with the style of
card guides that
Vince is referring to: (I think)
http://www.oldcomputers.arcula.co.uk/files/images/pdp8408.jpg
Yep, that's what mine look like.
Different than the 8/A 400.
Here is a very clear photo of the card guides and cage for that beast.
http://www.retrotechnology.com/restore/8a_1sttest_trans.jpg
Yes. I'm unclear on whether the other kind could be used. It looks like
the appropriate little rectangular holes are provided, but I don't think I
have a 400 to try it.
Those "400" guides actually look easier to use. The kind I have are
frail and fussy.
Vince
9 a.m.
-----Oorspronkelijk bericht-----
From: jwsmobile
Sent: Thursday, March 10, 2016 8:49 AM
To: General Discussion: On-Topic Posts
Subject: Re: Speaking of card cages...
http://www.oldcomputers.arcula.co.uk/files/images/pdp8408.jpg
http://www.retrotechnology.com/restore/8a_1sttest_trans.jpg
I am pretty sure I have both, but I will out this weekend,
so no visit to my "Home of Old Iron" to take pictures.
Next week ...
If the OP can say what he's looking for more clearly ...
- Henk, PA8PDP - without any PDP8 :-(
9:27 a.m.
From: jwsmobile: Wednesday, March 09, 2016 11:49 PM
Different than the 8/A 400.
Here is a very clear photo of the card guides and cage for that beast.
http://www.retrotechnology.com/restore/8a_1sttest_trans.jpg
It is likely that with decent photos of one of these (outside the card cage),
and maybe a couple of measurements, I could whip up a design file pretty
easily.
Isn't it essentially a row of circles with the right diameter, spacing, and
depth (ending on half-circles), with some snap-in clips on the back?
Vince
9 Mar
9 Mar
3:16 p.m.
From: Marc Howard: Wednesday, March 09, 2016 11:51 AM
Has anyone ever reproduced the card guides used in the
8/A chassis? I
assume these are identical to those used in PDP-11s as well. My are beyond
brittle.
I have 3D printed the ones here:
http://www.so-much-stuff.com/pdp8/cad/3d.php
http://svn.so-much-stuff.com/svn/trunk/3D/CardGuide/8AGuide.jpg
with some success.
They are still fragile things, even when new. The hardest part is the
springy bits that clip into the card cage. They can be not springy
enough, or they're too hard and snap off instead of compressing.
(I've also snapped the spine off the guide trying to compress them.)
Still, with the right plastic and the right print, they seem to work at
least as well as the aged originals did.
Vince
9:46 p.m.
On 3/9/2016 3:16 PM, Vincent Slyngstad wrote:
From: Marc Howard: Wednesday, March 09, 2016 11:51 AM
Those are different
than the ones I have in my cage. Marc, do you have
ones like mine, or Vince's? Again I've not seen the ones in the 600
chassis, so don't know if they are what Vince printed or not.
These are more like the ones that were used in most of the Microdata
1600 card cages. They used one piece ones like this, and ones with two
slotted guides / slot as well in those.
As I said in my reply the ones in the 400 card cage are the ones which
have the round blisters with two strips composing all the card guides on
each side, rather than one / slot.
thanks
Jim
Has anyone ever reproduced the card guides used
in the 8/A chassis? I
assume these are identical to those used in PDP-11s as well. My are
beyond
brittle.
I have 3D printed the ones here:
http://www.so-much-stuff.com/pdp8/cad/3d.php
http://svn.so-much-stuff.com/svn/trunk/3D/CardGuide/8AGuide.jpg with some success.
They are still fragile things, even when new. The hardest part is the
springy bits that clip into the card cage. They can be not springy
enough, or they're too hard and snap off instead of compressing.
(I've also snapped the spine off the guide trying to compress them.)
Still, with the right plastic and the right print, they seem to work
at least as well as the aged originals did.
Vince
3209
days inactive
3210
days old
8 comments
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cramcram＠gmail.com -
henk.gooijen＠hotmail.com -
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v.slyngstad＠frontier.com