Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-20 Thread Paul Anderson via cctalk
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

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-20 Thread Paul Anderson via cctalk
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

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-19 Thread Eric Smith via cctalk
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

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-19 Thread Eric Smith via cctalk
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

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-18 Thread P Gebhardt via cctalk
> >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 >    >

RE: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-18 Thread Henk Gooijen via cctalk
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 H754.

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-18 Thread Noel Chiappa via cctalk
> 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

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-18 Thread Paul Anderson via cctalk
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

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-18 Thread P Gebhardt via cctalk
>    > 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

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-17 Thread Paul Anderson via cctalk
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: > >

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-17 Thread Eric Smith via cctalk
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

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-17 Thread Eric Smith via cctalk
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

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-17 Thread dwight via cctalk
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, 2018 at 3:05 PM Bill

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-17 Thread Noel Chiappa via cctalk
> 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,

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-17 Thread Noel Chiappa via cctalk
> 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

RE: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-17 Thread Henk Gooijen via cctalk
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

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-17 Thread Bill Degnan via cctalk
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

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-17 Thread Bill Degnan via cctalk
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

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-17 Thread P Gebhardt via cctalk
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

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-17 Thread Noel Chiappa via cctalk
> 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

Looking for two DEC H445 power bricks for PDP 11/40 project

2018-09-17 Thread P Gebhardt via cctalk
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