On 3/29/19 9:12 PM, Curious Marc via cctalk wrote:
> Which brings us to the real problem: we don’t have 360 Model 50 ALDs. Anyone
> has them?
I've been looking for years.
The few on bitsavers is all I've ever been able to get.
Decades later, people are still afraid to release them.
I tried to
> From: Al Kossow
> Decades later, people are still afraid to release them. I tried to get
> 2065 ALDs from someone that had them and they wouldn't give them to me.
Sounds like it's time to have someone high up at the CHM talk to someone
at IBM to get an OK; if you only ask for permis
> Sounds like it's time to have someone high up at the CHM talk to someone
> at IBM to get an OK; if you only ask for permission, not for IBM to cough
> up the info themselves, that might be doable.
It is very likely IBM does not have the information anymore - at least
not in the archives. Maybe i
On 3/30/2019 12:35 PM, Noel Chiappa via cctalk wrote:
> > From: Al Kossow
>
> > Decades later, people are still afraid to release them. I tried to get
> > 2065 ALDs from someone that had them and they wouldn't give them to me.
>
> Sounds like it's time to have someone high up at the C
> My experience with IBM legal (who were actually quite communicative when
> I approached them) on that front with IBM 1410 manuals suggests to me
> that they will not ever give explicit permission, because nobody at IBM
> will ever by confident that they won't end up giving away some trade
> secre
I have a PDP-11/23+ and the power supply (H786) "last ran when parked" a
year or so ago. But there's no DC output at all today, and the fans are
running so there is AC power...
I also have the original H7861 that came with it, which had a blown chopper
transistor. I couldn't find anything else b
Yes, that would be Carl’s “day to day” blog (http://rescue1130.blogspot.com/).
He is also on the list, lurking in the background. Carl, are you there?
Ken Shirriff has also several deeply researched blog articles on specific AGC
topics (righto.com).
Mike has some very interesting posts on his AGC
Hi Charles,
The H786 was standard for the 11/23, BA11-N. The H7861 was for the 11/23+,
BA11-S and had afrw more amps of +5 volts.
I would start by looking at the electronic caps.
I have a few extras here but am pretty busy for the next week or so.
Paul
On Sat, Mar 30, 2019 at 2:25 PM Charles v
Regarding my earlier request for help repairing an H786 and H7861, it
occurred to me that I could instead use a desktop PC power supply, having
several in the junkbox.
It's even small enough to fit in there once the H786 is removed.
So I patched the wiring harness from the PC supply to the scre
On 3/30/2019 2:25 PM, Charles via cctalk wrote:
> I have a PDP-11/23+ and the power supply (H786) "last ran when parked" a
> year or so ago. But there's no DC output at all today, and the fans are
> running so there is AC power...
> I also have the original H7861 that came with it, which had a blo
Update: I removed the H786 from the chassis, and set it up on the workbench
with loads on the +5 and +12.
No output. 320V across the half-bridge, but no +12 Startup. Found I had
forgotten to put a cliplead to the primary of the startup transformer.
Turned it on and it works... 5 and 12 volts into
On 03/30/2019 07:50 PM, Charles via cctalk wrote:
Update: I removed the H786 from the chassis, and set it up on the workbench
with loads on the +5 and +12.
No output. 320V across the half-bridge, but no +12 Startup. Found I had
forgotten to put a cliplead to the primary of the startup transform
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