måndag 9 september 2019 skrev Kyle Owen via cctalk :
> On Sun, Sep 8, 2019, 20:39 Guy Dunphy via cctalk
> wrote:
>
> > >
> > >We recently replaced the ferroresonant capacitor in a power supply on
> the
> > CHM's
> > >PDP-1. They do fail (thankfully, not often) - and they are not
> > super-critica
On 9/8/19 7:41 PM, Kyle Owen via cctalk wrote:
> I can't seem to find motor caps that meet the voltage spec of 660V. 8uF
> doesn't seem like a problem, but the combination together isn't looking
> good. Are there any specific vendors I should be looking at? My usual
> suspect of DigiKey isn't look
On Sun, Sep 8, 2019, 20:39 Guy Dunphy via cctalk
wrote:
> >
> >We recently replaced the ferroresonant capacitor in a power supply on the
> CHM's
> >PDP-1. They do fail (thankfully, not often) - and they are not
> super-critical
> >as to value. If the one you're replacing has the same marked value
At 04:54 PM 8/09/2019 -0700, you wrote:
>Hi Kyle,
>
>On Sun, 8 Sep 2019 18:42:06 -0500
>Kyle Owen via cctalk wrote:
>
>> Has anyone replaced the capacitor in a ferroresonant power supply with much
>> success? My current understanding is that the capacitor and transformer are
>> mated as a pair, so
AST-coax, AST-432, AST-SNA, etc. IBM comms products circa late 80s
I'm in the process of pdf-ing the manuals this afternoon.
The only product disk I have is AST-3780
Hi Kyle,
On Sun, 8 Sep 2019 18:42:06 -0500
Kyle Owen via cctalk wrote:
> Has anyone replaced the capacitor in a ferroresonant power supply with much
> success? My current understanding is that the capacitor and transformer are
> mated as a pair, so replacing just one of them would require carefu
Has anyone replaced the capacitor in a ferroresonant power supply with much
success? My current understanding is that the capacitor and transformer are
mated as a pair, so replacing just one of them would require careful
consideration.
The PDP-8/I I'm working on has a 704A in it, with a GE 8uF 660
The Vintage Computer Federation is pleased to announce Vintage Computer
Festival Pacific Northwest 2020! We will be at Living
Computers:Museum+Labs in Seattle Washington on Saturday March 21st and
Sunday March 22nd, 2020.
To make this happen we are looking for exhibitors, speakers and
volunteers.
On 9/8/19 4:21 PM, Mister PDP via cctalk wrote:
I guess I should have been a little more specific about the memory issues I
was having when I made this post. For the most part these issues seem to be
scattered all about memory. Also, while the XXDP I have been running has
been catching more or le
I guess I should have been a little more specific about the memory issues I
was having when I made this post. For the most part these issues seem to be
scattered all about memory. Also, while the XXDP I have been running has
been catching more or less the same addresses every time I run it, someone
On 9/8/19 3:20 PM, Noel Chiappa via cctalk wrote:
> From: Mister PDP
> listed back there were numerous bad addresses all over memory.
> ...
> I cannot find schematics for any of the boards
.
With the completed chart in hand, given a failing word (address and bad
data),
> From: Mister PDP
> listed back there were numerous bad addresses all over memory.
> ...
> I cannot find schematics for any of the boards
You can repair MOS memory boards where the board is basically working, but
just has some failing memory chips, without schematics.
First you
Hello,
A few weeks ago I ordered a Sigma 400255 for my H11A LSI-11 computer with
the hopes of getting a 8" floppy hooked up for VCFMW. For the most part,
all the tests I ran from the ODT seemed to be AOK. The one this I couldn't
do it boot RT-11 from my TU58 emulator, as it would crash every time.
On 9/2/19 9:56 AM, Tony Duell wrote:
On Mon, Sep 2, 2019 at 5:35 PM Alan Perry via cctech
wrote:
Can anyone here provide a pointer to info on testing vintage power
supplies? Search results on the web may eventually lead to the kind of
info that I am looking for, but I have to get through t
I've been contemplating a floppy diskette drive emulator with features to make
it fit better into systems using 50-pin Shugart style floppy drive interfaces
vs. the other emulators already on the market. Studying manuals for various 8"
floppy diskette drives, I see that they generally provided a
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