5 Mar
2015
5 Mar
'15
6 p.m.
Hi all,
I'm currently searching around for a small cardcage+backplane, if I'm not
mistaken DEC part numbers H9281-BA or H9281-BB for a bigger one. The -BA
(4x dual heights) has my preference as I'm looking to build a very nice,
cute and not that power hungry PDP-11.
Does anyone have one available?
With kind regards,
Sander Reiche
the Netherlands
6 Mar
6 Mar
7:33 a.m.
ja. kom maar eens kijken bij hack42.nl in arnhem. we hebben wel wat :-)
waar zit je ergens?
On 06-03-15 00:00, Sander Reiche wrote:
Hi all,
I'm currently searching around for a small cardcage+backplane, if I'm not
mistaken DEC part numbers H9281-BA or H9281-BB for a bigger one. The -BA
(4x dual heights) has my preference as I'm looking to build a very nice,
cute and not that power hungry PDP-11.
Does anyone have one available?
With kind regards,
Sander Reiche
the Netherlands
--
Met vriendelijke Groet,
Simon Claessen
drukknop.nl
11:28 a.m.
On 03/05/2015 05:00 PM, Sander Reiche wrote:
Hi all,
I'm currently searching around for a small cardcage+backplane, if I'm not
mistaken DEC part numbers H9281-BA or H9281-BB for a bigger one. The -BA
(4x dual heights) has my preference as I'm looking to build a very nice,
cute and not that power hungry PDP-11.
Unibus or Q-bus? I have some Q-bus backplanes that came
from the WELL.
Picked them up at some surplus
place in the bay area, I
think probably Mike
Quinn's.
The backplanes don't have a manufacturer's label. They may
have been custom
made by the WELL, I don't know. I also don't know if they
are Q-18 or Q-22.
They have a card cage, cooling fan and Todd power supply. I
have two of them.
Jon
12:30 p.m.
On Fri, Mar 06, 2015 at 10:28:57AM -0600, Jon Elson wrote:
On 03/05/2015 05:00 PM, Sander Reiche wrote:
What size?
/P
Hi all,
I'm currently searching around for a small cardcage+backplane, if I'm not
mistaken DEC part numbers H9281-BA or H9281-BB for a bigger one. The -BA
(4x dual heights) has my preference as I'm looking to build a very nice,
cute and not that power hungry PDP-11.
Unibus or Q-bus? I have some Q-bus backplanes that came from the
WELL.
Picked them up at some surplus place in the bay area, I think
probably Mike
Quinn's.
The backplanes don't have a manufacturer's label. They may have
been custom
made by the WELL, I don't know. I also don't know if they are Q-18
or Q-22.
They have a card cage, cooling fan and Todd power supply. I have
two of them.
Jon
9:53 p.m.
On 03/06/2015 11:30 AM, Pontus Pihlgren wrote:
On Fri, Mar 06, 2015 at 10:28:57AM -0600, Jon Elson
wrote:
9 slots x 4 connectors wide. Standard Q-bus.
Jon
On 03/05/2015 05:00 PM, Sander Reiche wrote:
What size?
Hi all,
I'm currently searching around for a small cardcage+backplane, if I'm not
mistaken DEC part numbers H9281-BA or H9281-BB for a bigger one. The -BA
(4x dual heights) has my preference as I'm looking to build a very nice,
cute and not that power hungry PDP-11.
Unibus or Q-bus? I have some Q-bus backplanes that came from the
WELL.
Picked them up at some surplus place in the bay area, I think
probably Mike
Quinn's.
The backplanes don't have a manufacturer's label. They may have
been custom
made by the WELL, I don't know. I also don't know if they are Q-18
or Q-22.
They have a card cage, cooling fan and Todd power supply. I have
two of them.
Jon 
7 Mar
7 Mar
4:37 p.m.
Jon Elson wrote:
On 03/06/2015
11:30 AM, Pontus Pihlgren wrote:
On Fri,
Mar 06, 2015 at 10:28:57AM -0600, Jon Elson wrote:
On
03/05/2015 05:00 PM, Sander Reiche wrote:
Hi all,
I'm currently searching around for a small cardcage+backplane, if
I'm not
mistaken DEC part numbers H9281-BA or H9281-BB for a bigger one.
The -BA
(4x dual heights) has my preference as I'm looking to build a very
nice,
cute and not that power hungry PDP-11.
Unibus or Q-bus? I have some Q-bus backplanes that came from the
WELL.
Picked them up at some surplus place in the bay area, I think
probably Mike
Quinn's.
The backplanes don't have a manufacturer's label. They may have
been custom
made by the WELL, I don't know. I also don't know if they are Q-18
or Q-22.
They have a card cage, cooling fan and Todd power supply. I have
two of them.
Jon 
9:09 p.m.
On 07/03/2015 21:37, Jerome H. Fine wrote:
>>> On 03/05/2015 05:00 PM, Sander Reiche
wrote:
>>>> I'm currently searching around for a small cardcage+backplane, if
>>>> I'm not
>>>> mistaken DEC part numbers H9281-BA or H9281-BB for a bigger one.
If I remember correctly, a 9 slot x 4 connectors wide
are ABCD and
available with support for either 18-bit or 22-bit addresses. The
last slot usually expects a terminator board. I can't remember the
actual part numbers.
Not necessarily. H9273 (18-bit) and H9276 (22-bit) are indeed straight
backplanes, but H9275 is serpentine.
There are also more recent backplanes in a BA23 box
which are
8 slots by 4 connectors wide.
True, but Sander was looking for something small, and those boxes aren't
very small with the PSU and drive bays! He'd be better looking for a
BA11-M or its backplane, an H9270. That's a a 4x4 serpentine with card
guides, that can fitted right onto the side of an H780 PSU. Or a BA11-V
which is a small-form tabletop box with a 2x4 serpentine backplane
similar to an H9281-BA.
--
Pete
Pete Turnbull
9:53 p.m.
On 7 March 2015 at 21:09, Pete Turnbull <pete at dunnington.plus.com> wrote:
Not necessarily. H9273 (18-bit) and H9276 (22-bit)
are indeed straight
backplanes, but H9275 is serpentine.
I can confirm that the H9273 is Q18/CD (and thus straight), and that
the H9275 is Q22/Q22 serpentine. I actually have a "naked" H9275, that
I intend on building a nice 11/73 system out of when I get some
time... and more importantly money.
Something I've been wondering about actually. Since I don't have a
proper mounting box for the H9275 (looking for a BA11-NF box;
specifically one with a PDP-11/03-L bezel), I'd been wondering about
doing a silly project of mounting it inside a nice custom box and
bolting a 35KSR Teletype (another difficult as hell thing to find.
Would it be possible to "rehome" the guts of a VT-220 into something
else?) to the top in a sort of strange "Steampunk-11/73" setup. Anyone
here have any words of wisdom with regards to this harebrained idea?
...You know at a certain point you realize how much of a nerd/geek you
truly are when you're discussing casemodding a PDP-11.
Cheers,
Christian
--
Christian M. Gauger-Cosgrove
STCKON08DS0
Contact information available upon request.
8 Mar
8 Mar
12:03 a.m.
On 03/06/2015 11:30 AM, Pontus Pihlgren wrote:
I've put a couple pictures of the backplanes on my web site:
http://pico-systems.com/images/qbusbp.jpg
http://pico-systems.com/images/qbusps.jpg
I have two of these units. I just noticed that they have
Compuserve
property tags attached to the power supplies.
Jon
2:21 p.m.
On 03/06/2015 11:30 AM, Pontus Pihlgren wrote:
What size?
OK, I checked this unit, and it powers up fine. I also have
an MDB card
cage with backplane, 8 slot, marked MLSI chassis backplane
#40328.
I also have a DEC backplane only, no card cage, Backplane
Assy 5412233
I'm assuming from the 4 x 9 slots it must be Q-bus, but I
don't know
any more than that.
Jon
10 Mar
10 Mar
12:17 p.m.
On 03/08/2015 01:21 PM, Jon Elson wrote:
On 03/06/2015 11:30 AM, Pontus Pihlgren wrote:
So, I still have one of the powered 9-slot Q-bus backplanes
available.
Also, the above mentioned DEC backplane and the MDB backplane
with card cage. All, I'm assuming, are Q-bus.
Anybody want these?
Thanks,
Jon
What size?
OK, I checked this unit, and it powers up fine. I also
have an MDB card
cage with backplane, 8 slot, marked MLSI chassis backplane
#40328.
I also have a DEC backplane only, no card cage, Backplane
Assy 5412233
I'm assuming from the 4 x 9 slots it must be Q-bus, but I
don't know
any more than that.
Jon
15 Mar
15 Mar
3:58 p.m.
I have two more items. One is a 9-slot DEC backplane,
Backplane Assy 5412233
http://pico-systems.com/images/102_6985.JPG
http://pico-systems.com/images/102_6986.JPG
Also, I have an MDB card cage with backplane, 8 slot, marked
MLSI chassis backplane #40328.
http://pico-systems.com/images/102_6987.JPG
http://pico-systems.com/images/102_6988.JPG
If anybody is interested, $10 plus shipping (each item) and
you can have it.
I'm in the St. Louis, MO area, ZIP 63122)
Jon
6:30 p.m.
Hi Jon,
If no-one else has taken them, I'd like both if that's ok?
If that's alright by you, I would need the postage to Brisbane, Australia just in a
small box, lowest-rate airmail would be fine.
I can pay you via PayPal,
Regards,
Steve Malikoff.
Brisbane, Australia
---------------------------- Original Message ----------------------------
Subject: Re: Small DEC cardcage with backplane
From: "Jon Elson" <elson at pico-systems.com>
Date: Mon, March 16, 2015 5:58 am
To: General at classiccmp.org
"Discussion at classiccmp.org:On-Topic and Off-Topic Posts" <cctalk
at classiccmp.org>
--------------------------------------------------------------------------
I have two more items. One is a 9-slot DEC
backplane,
Backplane Assy 5412233
http://pico-systems.com/images/102_6985.JPG
http://pico-systems.com/images/102_6986.JPG
Also, I have an MDB card cage with backplane, 8 slot, marked
MLSI chassis backplane #40328.
http://pico-systems.com/images/102_6987.JPG
http://pico-systems.com/images/102_6988.JPG
If anybody is interested, $10 plus shipping (each item) and
you can have it.
I'm in the St. Louis, MO area, ZIP 63122)
Jon
6:46 p.m.
Facepalm.... my sincere apology to this great mailinglist I only recently joined - In my
extreme haste I forgot to edit the 'reply to' to send my reply to Jon directly,
and it appears it went to the list. Please disregard it, I've only done that once
before in my 29 years on the net :( - Steve.
7 Mar
7 Mar
10:31 p.m.
I have numerous boxes and just remembered 4 or 5 q-bus systems which were
built by one of the departments at the University of Illinois. I don't
remember which backplane is in them, but I also have a few other new 3ed
party ones here somewhere .
On Thu, Mar 5, 2015 at 5:00 PM, Sander Reiche <sander.reiche at gmail.com>
wrote:
Hi all,
I'm currently searching around for a small cardcage+backplane, if I'm not
mistaken DEC part numbers H9281-BA or H9281-BB for a bigger one. The -BA
(4x dual heights) has my preference as I'm looking to build a very nice,
cute and not that power hungry PDP-11.
Does anyone have one available?
With kind regards,
Sander Reiche
the Netherlands
3414
days inactive
3424
days old
14 comments
9 participants
participants (9)
-
captainkirk359＠gmail.com -
elson＠pico-systems.com -
jhfinedp3k＠compsys.to -
pete＠dunnington.plus.com -
pontus＠Update.UU.SE -
sander.reiche＠gmail.com -
simski＠dds.nl -
steven＠malikoff.com -
useddec＠gmail.com