5 Nov
2017
5 Nov
'17
6:04 a.m.
So if someone's building an earlier -8 from bits and pieces, here:
https://www.ebay.com/itm/192350321318
is something they might find useful - an empty chassis.
(I'm not associated with the seller, although I've bought stuff from them
before. They have some other PDP-8 stuff listed, too.)
Noel
7 Nov
7 Nov
7 a.m.
Can you tell which PDP8 this goes with?? Would an 8/e panel fit?
Dave
On Monday, November 6, 2017 11:26 AM, Noel Chiappa via cctalk <cctalk at
classiccmp.org> wrote:
So if someone's building an earlier -8 from bits and pieces, here:
? https://www.ebay.com/itm/192350321318
is something they might find useful - an empty chassis.
(I'm not associated with the seller, although I've bought stuff from them
before. They have some other PDP-8 stuff listed, too.)
??? Noel
7:09 a.m.
The seller in the past sold an 8i I believe, it's probably an 8i.
Bill
On Tue, Nov 7, 2017 at 10:00 AM, Dave via cctalk <cctalk at classiccmp.org>
wrote:
Can you tell which PDP8 this goes with? Would an 8/e
panel fit?
Dave
On Monday, November 6, 2017 11:26 AM, Noel Chiappa via cctalk <
cctalk at classiccmp.org> wrote:
So if someone's building an earlier -8 from bits and pieces, here:
https://www.ebay.com/itm/192350321318
is something they might find useful - an empty chassis.
(I'm not associated with the seller, although I've bought stuff from them
before. They have some other PDP-8 stuff listed, too.)
Noel
8 Nov
8 Nov
4:38 a.m.
On 07/11/2017 15:09, william degnan via cctalk wrote:
The seller in the past sold an 8i I believe, it's
probably an 8i.
Bill
On Tue, Nov 7, 2017 at 10:00 AM, Dave via cctalk <cctalk at classiccmp.org>
wrote:
> Can you tell which PDP8 this goes with? Would an 8/e panel fit?
> Dave
It's an 8/e (of which I have two, and a nearby friend has three or four
more, as well as a couple of 8/Ms) chassis. It takes a big linear PSU
and two 10-slot Omnibus backplanes. The 8/F and 8/M (OEM version,
usually with a very simple turnkey panel) are shorter, take only one
10-slot Omnibus backplane, and have a completely different switch-mode PSU.
--
Pete
Pete Turnbull
7:53 a.m.
I managed to snag the chassis and what I hope is the matching cover.? I thought it looked
like an 8/e or 8/f.
When I bought my PDP 8/m, I also picked up 2 extra complete board sets (including front
panels, and power supplies from the seller's swap/repair stock.? The front panels are
the 8/f/m versions (with LEDs), as are the switching supplies.? I've been looking for
a chassis ever since, although I suppose I could have adapted a commercial 19"
chassis.? Now I need to find a backplane (or 2), bezel, and lock.
As a side note, I bought my 8/m from a guy who ran a business setting up leather and
textile embroidery (cowboy boots, etc.) systems based on DEC PDP/8 and PDP/11
controllers.? The business was still going as of 3 years ago.? The owner was working on a
EPROM emulator to simplify programming of a particular PDP-11 based controller, which
stored the designs in EPROM.? He apparently still had some customers running setups in
Canada and India based on 8/a systems.? He was just getting around to retiring the last of
the 8/m based systems.? His shop was (hopefully is) a living vintage DEC museum, but for
him it was simply his work.? Of course a Raspberry Pi could fully replace those systems,
even running the PDP-11 embroidery design software on SIMH, but apparently customers
don't like to mess with working systems.
Dave
On Wednesday, November 8, 2017 6:50 AM, Pete Turnbull via cctalk <cctalk at
classiccmp.org> wrote:
On 07/11/2017 15:09, william degnan via cctalk wrote:
The seller in the past sold an 8i I believe, it's
probably an 8i.
Bill
On Tue, Nov 7, 2017 at 10:00 AM, Dave via cctalk <cctalk at classiccmp.org>
wrote:
> Can you tell which PDP8 this goes with?? Would an 8/e panel fit?
> Dave
It's an 8/e (of which I have two, and a nearby friend has three or four
more, as well as a couple of 8/Ms) chassis.? It takes a big linear PSU
and two 10-slot Omnibus backplanes.? The 8/F and 8/M (OEM version,
usually with a very simple turnkey panel) are shorter, take only one
10-slot Omnibus backplane, and have a completely different switch-mode PSU.
--
Pete
Pete Turnbull
7 Nov
7 Nov
7:47 a.m.
On Tue, Nov 7, 2017 at 10:00 AM, Dave via cctalk <cctalk at classiccmp.org> wrote:
Can you tell which PDP8 this goes with? Would an 8/e
panel fit?
Looks like a long Omnibus chassis, so -8/e or -8/f.
Yes. An 8/e/f/m bezel and panel should fit. It shouldn't be horribly
hard to find a bare Omnibus backplane block. The original PSU might
be a bit tougher, but except for classic purity, there's nothing
wrong with coming up with a modern PSU for it. Not sure why there's a
10A fuse for -15V. I totally believe the 1.5A for +15V, but I don't
know what peripherals draw that much current at -15V, unless it's part
of the core memory requirements. M-series logic is mostly TTL and
mostly +5V.
If you were going to fit a modernish unit in there, like some flavor
of 6120 board, you'd probably have to roll your own front panel. The
Spare Time Gizmos products are all 2:3 scale.
-ethan
9:20 a.m.
On Tue, Nov 7, 2017 at 3:47 PM, Ethan Dicks via cctalk
<cctalk at classiccmp.org> wrote:
Yes. An 8/e/f/m bezel and panel should fit. It
shouldn't be horribly
hard to find a bare Omnibus backplane block. The original PSU might
be a bit tougher, but except for classic purity, there's nothing
wrong with coming up with a modern PSU for it. Not sure why there's a
10A fuse for -15V. I totally believe the 1.5A for +15V, but I don't
know what peripherals draw that much current at -15V, unless it's part
of the core memory requirements. M-series logic is mostly TTL and
mostly +5V.
I don't know how much current it needs, but a quick check in the
PDP8/e printset shows that that the core memory does use the
-15V supply rail.
-tony
2375
days inactive
2378
days old
6 comments
6 participants
participants (6)
-
ard.p850ug1＠gmail.com -
billdegnan＠gmail.com -
dfnr2＠yahoo.com -
ethan.dicks＠gmail.com -
jnc＠mercury.lcs.mit.edu -
pete＠dunnington.plus.com