24 Apr
2021
24 Apr
'21
8:28 p.m.
From: Fritz Mueller
could I ask that you take some closeups around the
Mate-n-Locks along
the top? I'd be very interested to see the board traces and the details
of the red bus wiring there.
I had a look at my /45 (a later KB11-D - although I think the backplanes for
the -A and -D are identical), and it seems to have heavy red wires attached
to the upper row of Mate-n-Lok's that look just like those on Josh's. I'd
really want to take pictures of mine (I don't want to take the backplane out
- too much work - but I can get decent images with it in, I think) so I
can compare them directly, though, not depend on visual memory.
Noel
PS: I wonder how many people here have -11/45's? ISTR one other, but they aren't
common.
11:12 p.m.
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Tony Duell via
cctalk
Sent: Saturday, April 24, 2021 11:56 PM
To: Noel Chiappa; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: DEC PDP-11/45 backplane +5 ECO
Do #2; not yet fully restored. Soon(ish) ...
Has five red bodge wires that appear to be the same as on Josh's photo.
https://onedrive.live.com/?authkey=%21AJkwqfjZ3cw06W8&cid=CC8708A7CAEAF…
paul
PS: I wonder how many people here have
-11/45's? ISTR one other, but they aren't
common.
I do.
-tony 
25 Apr
25 Apr
8:09 a.m.
Noel wrote...
PS: I wonder how many people here have -11/45's?
ISTR one other, but
they aren't common.
Tony replied...
I do.
--------------
I have a dual bay 11/45 with RL02, RX02, BA11 expansion, and an early 3rd party (CSI?)
linktape. All restored, tested, and working with spares and docs. In retirement I'm
focusing on my 21MX systems, but I will keep one or two pdp-11's. The 11/45 will not
be one I keep, it's up for sale and may end up on ebay. Other than the 11/45, most of
my non-HP stuff will be given or traded away.
J
9:08 a.m.
On 4/24/21 10:28 PM, Noel Chiappa via cctalk wrote:
I have an 11/45. I can also take pics if it would help.
--tom
From: Fritz
Mueller
could I ask that you take some closeups around
the Mate-n-Locks along
the top? I'd be very interested to see the board traces and the details
of the red bus wiring there.
I had a look at my /45 (a later KB11-D - although I think the backplanes for
the -A and -D are identical), and it seems to have heavy red wires attached
to the upper row of Mate-n-Lok's that look just like those on Josh's. I'd
really want to take pictures of mine (I don't want to take the backplane out
- too much work - but I can get decent images with it in, I think) so I
can compare them directly, though, not depend on visual memory.
Noel
PS: I wonder how many people here have -11/45's? ISTR one other, but they aren't
common. 
1:13 p.m.
On 4/25/21 12:08 PM, Tom Uban via cctech wrote:
On 4/24/21 10:28 PM, Noel Chiappa via cctalk wrote:
I have an 11/45. I can also take pics if it would help.
--tom
I used to have 4 of them. Gave them to people who were
trying to set up museums. Never heard how that went.
Miss them as much as I miss my 11/24. I have no UNIBUS
PDP's anymore.
bill
From:
Fritz Mueller
could I ask that you take some closeups around
the Mate-n-Locks along
the top? I'd be very interested to see the board traces and the details
of the red bus wiring there.
I had a look at my /45 (a later KB11-D - although I think the backplanes for
the -A and -D are identical), and it seems to have heavy red wires attached
to the upper row of Mate-n-Lok's that look just like those on Josh's. I'd
really want to take pictures of mine (I don't want to take the backplane out
- too much work - but I can get decent images with it in, I think) so I
can compare them directly, though, not depend on visual memory.
Noel
PS: I wonder how many people here have -11/45's? ISTR one other, but they aren't
common. 
1:27 p.m.
Van: Noel Chiappa via cctalk<mailto:cctalk at classiccmp.org>
Verzonden: zondag 25 april 2021 05:28
Aan: cctalk at classiccmp.org<mailto:cctalk at classiccmp.org>
CC: jnc at mercury.lcs.mit.edu<mailto:jnc at mercury.lcs.mit.edu>
Onderwerp: Re: DEC PDP-11/45 backplane +5 ECO
PS: I wonder how many people here have -11/45's? ISTR one other, but they aren't
common.
I have one 11/45, and one 11/55.
Most of the CPU boards in the 11/55 are the same as the ones in the 11/45,
but I have the M8120 and 4 M8121 boards (32kW bipolar RAM). It is a bit
weird, but in the 11/55 are also two G114 boards (4kW MOS RAM), IIRC.
Both will need a thorough inspection before powering up!
Henk, PA8PDP
6:03 p.m.
I do. An early one from Stanford.
Sent from my iPhone
On Apr 24, 2021, at 11:28 PM, Noel Chiappa via cctalk
<cctalk at classiccmp.org> wrote:
?
From: Fritz Mueller
could I ask that you take some closeups around
the Mate-n-Locks along
the top? I'd be very interested to see the board traces and the details
of the red bus wiring there.
I had a look at my /45 (a later KB11-D - although I think the backplanes for
the -A and -D are identical), and it seems to have heavy red wires attached
to the upper row of Mate-n-Lok's that look just like those on Josh's. I'd
really want to take pictures of mine (I don't want to take the backplane out
- too much work - but I can get decent images with it in, I think) so I
can compare them directly, though, not depend on visual memory.
Noel
PS: I wonder how many people here have -11/45's? ISTR one other, but they aren't
common. 
26 Apr
26 Apr
12:11 a.m.
On Sat, Apr 24, 2021 at 9:28 PM Noel Chiappa via cctalk <
cctalk at classiccmp.org> wrote:
I had a look at my /45 (a later KB11-D - although I
think the backplanes
for
the -A and -D are identical),
I did not think they used the same backplane, but 11/45 maintenance manual
(EK-11045-MM-007) confirms that they are. Tables 1-2 for the KB11-A and
table 1-3 for the KB11-D confirm that the backplane for both is the
70-08871.
It's possible that the KB11-D requires a higher rev of the backplane than
the minimum for a KB11-A. That's the case for the 11/70. The KB11-B
(original 11/70) and KB11-C (later 11/70) have essentially the same changes
as from the KB11-A to KB11-D, and the 11/70 maintenance manual
(EK-11070-MM says that both use the 70-11051 backplane, but that for a
KB11-C, the backplane must be revision D or later.
It sure would be nice to get backplane wirelists for all four (KB11-A, -B,
-C, and -D).
Also, I'm looking for a Field Maintenance Print Set for the RH70.
1105
days inactive
1106
days old
8 comments
9 participants
participants (9)
-
ard.p850ug1＠gmail.com -
bill.gunshannon＠hotmail.com -
henk.gooijen＠hotmail.com -
jacob.ritorto＠gmail.com -
jnc＠mercury.lcs.mit.edu -
jwest＠classiccmp.org -
pbirkel＠gmail.com -
spacewar＠gmail.com -
tom＠figureeightbrewing.com