I also saw some notes about different wiring harnesses for different serial
numbers. A lot to be careful with.
On Thu, Sep 20, 2018 at 1:22 AM, Paul Anderson wrote:
> I grabbed a 11/60, 11/35 system manual. wanting to see hot power was set
> up in the BA11-D and -K, only to find it dealt with th
I grabbed a 11/60, 11/35 system manual. wanting to see hot power was set up
in the BA11-D and -K, only to find it dealt with the BA11-F only.
It does state the H754 in used with the MF11-U/UP. needless to say, there
are different plugs for slot "E" and possibly a change or a jumper.
I will look f
On Tue, Sep 18, 2018 at 8:27 AM, Noel Chiappa via cctalk <
cctalk@classiccmp.org> wrote:
> (Note that if you have an old
> machine/harness, there's a jumper you have to add if you have only a single
> H745; see the second paragraph on page 6-18 of DEC-11-H40SA-B-D.)
>
I totally missed that. It wa
On Tue, Sep 18, 2018 at 2:11 AM, P Gebhardt via cctalk <
cctalk@classiccmp.org> wrote:
> As I don't have core memory modules available, I thought of using MS11
> memory,
> which, according to my research, seems to be an option for 11/40 systems.
> The system manual states on page 6-7 that the base
>
>Am Dienstag, 18. September 2018, 16:27:49 MESZ hat Noel Chiappa
> Folgendes >geschrieben:
>
>
>
>
>
> > From: Pierre Gebhardt
>
> > As I don't have core memory modules available, I thought of using MS11
> > memory, which, according to my research, seems to be an option for
> > 11/
Posts
Onderwerp: Re: Looking for two DEC H445 power bricks for PDP 11/40 project
>> From: Henk Gooijen
>
> > As far as I know, the 11/40 uses only one H745.
>
>Depends on what kind of memory it has. If MF11-L, it has two H745's; if
>MM11-U, it has an H745 and an
> From: Pierre Gebhardt
> As I don't have core memory modules available, I thought of using MS11
> memory, which, according to my research, seems to be an option for
> 11/40 systems.
Err, which kind of MS11? There are lots of different ones:
http://gunkies.org/wiki/MS11
and t
I'll check my system tomorrow if I can. If you are using a DEC MS11-LB or
LD or compatible, you will need a DD11CK or DK backplane. If used in a
BA11-BF, you will Need DD11-CF or DF, which is the same as the CK/DK, but
with a longer wiring harness.
DEC made an "extension cable" to do this, but th
> > From: Henk Gooijen
>
> > As far as I know, the 11/40 uses only one H745.
>
>Depends on what kind of memory it has. If MF11-L, it has two H745's; if
>MM11-U, it has an H745 and an H754.
>
>(The harness has two different connectors for the 5th 'brick', so it can
>handle either kind. At least
The H744 was 25 amp, but then they came out with the H7440 28amp? And the
H7441 at 32 amp.
A lot of units were upgraded in the field.
Paul
On Mon, Sep 17, 2018 at 5:49 PM, Eric Smith via cctalk <
cctalk@classiccmp.org> wrote:
> On Mon, Sep 17, 2018 at 4:17 PM, dwight via cctalk
> wrote:
>
> >
On Mon, Sep 17, 2018 at 4:17 PM, dwight via cctalk
wrote:
> I had a problem with brick power supplies a number of years back. I found
> an issue that caused them to fail. I had about ten of them on the same
> power switch. You'd think this would not be an issue but it is.
>
> You see it works lik
On Mon, Sep 17, 2018 at 1:30 PM, Henk Gooijen via cctalk <
cctalk@classiccmp.org> wrote:
> As far as I know, the 11/40 uses only one H745.
> And vague memory seems te recall that the -15V brick is an “odd one”,
> because, unlike all other bricks, it needs the +15V from the regulator that
> is insi
Discussion: On-Topic and Off-Topic Posts
Subject: Re: Looking for two DEC H445 power bricks for PDP 11/40 project
here is a photo of some of the failed regulators I have on hand that I have
pulled from production over the years:
https://pbs.twimg.com/media/DML8O8dW0AISX5m.jpg
On Mon, Sep 17,
> From: Henk Gooijen
> As far as I know, the 11/40 uses only one H745.
Depends on what kind of memory it has. If MF11-L, it has two H745's; if
MM11-U, it has an H745 and an H754.
(The harness has two different connectors for the 5th 'brick', so it can
handle either kind. At least, that's
> From: Pierre Gebhardt
> There are indeed some DEC power brick models on epay, but none
> regarding the H745.
Here is one:
https://www.ebay.com/itm/270303423286
but it is _really_ pricey. I have dealt with them before, they put high
prices on things; try offering them a reasonabl
See answer below …
Van: P Gebhardt via cctalk<mailto:cctalk@classiccmp.org>
Verzonden: maandag 17 september 2018 19:54
Aan: General Discussion: On-Topic and Off-Topic
Posts<mailto:cctalk@classiccmp.org>
Onderwerp: Looking for two DEC H445 power bricks for PDP 11/40 project
Hello lis
here is a photo of some of the failed regulators I have on hand that I have
pulled from production over the years:
https://pbs.twimg.com/media/DML8O8dW0AISX5m.jpg
On Mon, Sep 17, 2018 at 3:05 PM Bill Degnan wrote:
> H745's are harder to find. I have at least one that needs service but I
> am lo
H745's are harder to find. I have at least one that needs service but I am
located in the USA and I have no clear idea what's wrong with it. Is it
that you have zero h745's at all or you have a bad one? Is there a typical
point of failure for these? If so, I'd try to track down a bad one and fi
Hello Noel,
thanks for your quick reply. There are indeed some DEC power brick models on
epay, but none regarding the H745.
All the best,
Pierre
> From: Pierre Gebhardt
> two H745 bricks (delivering -15V) which are still missing. I'd be very
> happy, if anybody could consider p
> From: Pierre Gebhardt
> two H745 bricks (delivering -15V) which are still missing. I'd be very
> happy, if anybody could consider parting with one or two. Location is
> in Germany.
There should be some on eBait; mildly expensive, but if you get them from
the US, the shipping is
Hello list,
last year, I was able to obtain a BA11-F chassis for my PDP 11/40 build-up
project. The power supply to run a system in basic configuration is complete
except for two H745 bricks (delivering -15V) which are still missing.
I'd be very happy, if anybody could consider parting with one o
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