Update on this: I did put together a battery and voltage divider to
test the AXV11. The label on the A/D module says it brings the output
from the multiplexer to one of the external pins. I was able to verify
that the voltage applied to a couple of the A/D inputs makes it through
the multipl
> On Feb 8, 2022, at 2:34 PM, Douglas Taylor via cctalk
> wrote:
>
> Update on this: I did put together a battery and voltage divider to test the
> AXV11. The label on the A/D module says it brings the output from the
> multiplexer to one of the external pins. I was able to verify that t
> On Feb 8, 2022, at 2:53 PM, Wayne S via cctech wrote:
>
> Since so many audio tape players and computer magtape units were made it
> would stand to reason that there has to be a stash somewhere of tape heads
> and it’s just a matter of finding where they are.
> Are there any part numbers o
There are some vintage tablets in Minneapolis (Eden Prarire) that would like,
but the seller will not ship.
Any help? You will have to pay, pick up, and ship.
I would do it for you!
Thanks-
Steve in CA
On Sun, Feb 6, 2022 at 9:20 AM Douglas Taylor via cctalk
wrote:
>
> Does anyone have any info on the A/D module? Who made it? Can you open
> it up? Does XXDP have a test for this?
http://www.bitsavers.org/pdf/dec/pdp11/xxdp/PDP11_DiagnosticHandbook_1988.pdf
PDP11 DIAGNOSTIC HANDBOOK 1988, Page
> From: Steve at oldcomputers.net
> There are some vintage tablets in Minneapolis (Eden Prarire) that would
> like, but the seller will not ship.
> Any help?
When dealing with eBaiters who can't/won't ship, I have had good luck with
PakMail (http://www.pakmail.com/); for a usually
On 2/8/22 13:34, Douglas Taylor via cctalk wrote:
Update on this: I did put together a battery and voltage
divider to test the AXV11. The label on the A/D module
says it brings the output from the multiplexer to one of
the external pins. I was able to verify that the voltage
applied to a co
On 2/8/2022 5:22 PM, Jon Elson via cctalk wrote:
On 2/8/22 13:34, Douglas Taylor via cctalk wrote:
Update on this: I did put together a battery and voltage divider to
test the AXV11. The label on the A/D module says it brings the
output from the multiplexer to one of the external pins. I was
On 2/8/22 16:35, Douglas Taylor via cctalk wrote:
On 2/8/2022 5:22 PM, Jon Elson via cctalk wrote:
On 2/8/22 13:34, Douglas Taylor via cctalk wrote:
Update on this: I did put together a battery and
voltage divider to test the AXV11. The label on the A/D
module says it brings the output from
Hi
Jerry Walker and I have an 11/34 under restoration.
We have run into a bit of a problem.
On the M8266 CPU control board a defective 7404 (E111) has killed a
bunch of the PROMs holding the microcode.
Does anybody have or can get images of the PROMs on this board so
replacement de
I found
https://deramp.com/downloads/mfe_archive/011-Digital%20Equipment%20Corporation/08%20PDP-11/01%20PDP-1104-1134/05%20PDP-1104-1134%20Microcode/
which has the source code...
But I couldn't find the tools to use these files to create microcode images.
http://filedump.theglitchworks.net/softwa
I have many 8mm tapes. A few are new. First comers get new ones.
I have a few 8mm cleaning cassettes
I have about a dozen DLT-II tapes.
I have a Quantum DLT-II drive with wide SCSI LVD/SE interface
I have some Ultrium LTO fibre-channel SCSI drives that were removed
from a tape-mounting robot se
On Tue, Feb 8, 2022 at 7:04 PM Warner Losh wrote:
> I found
> https://deramp.com/downloads/mfe_archive/011-Digital%20Equipment%20Corporation/08%20PDP-11/01%20PDP-1104-1134/05%20PDP-1104-1134%20Microcode/
> which has the source code...
>
> But I couldn't find the tools to use these files to create
> So it sermsdectape heads are special. I don’t think Dec would have the desire
> to make them internally so they probably contractef with a company already
> set up to do that. Who were the big tape head manufacturers at that time?
> Does anyone know?
A photo of the back of a TU56 DECtape head
On 2/8/22 13:04, Ron Pool via cctech wrote:
So it sermsdectape heads are special. I don’t think Dec would have the desire
to make them internally so they probably contractef with a company already set
up to do that. Who were the big tape head manufacturers at that time? Does
anyone know?
A ph
On 2/8/22 13:04, Ron Pool via cctech wrote:
So it sermsdectape heads are special. I don’t think Dec would have the desire
to make them internally so they probably contractef with a company already set
up to do that. Who were the big tape head manufacturers at that time? Does
anyone know?
A ph
> On Feb 8, 2022, at 4:04 PM, Ron Pool via cctech wrote:
>
>> So it sermsdectape heads are special. I don’t think Dec would have the
>> desire to make them internally so they probably contractef with a company
>> already set up to do that. Who were the big tape head manufacturers at that
>>
> On Feb 8, 2022, at 5:14 PM, Wayne S via cctech wrote:
>
> Searched a lille bit for Western Magnetics. Here’s a site that has some
> surplus heads, even a western magnetics onebut probably not the correct one.
> There is a corporate charter record for Western Magnetics in Minnesota dated
On 2/8/22 14:14, Wayne S via cctech wrote:
Searched a lille bit for Western Magnetics. Here’s a site that has some
surplus heads, even a western magnetics onebut probably not the correct one.
There is a corporate charter record for Western Magnetics in Minnesota dated
1964. Maybe this is the
You could try: http://www.jrfmagnetics.com/
Tom
On Wed, Feb 9, 2022 at 3:06 PM Gary Oliver via cctalk
wrote:
> On 2/8/22 14:14, Wayne S via cctech wrote:
> > Searched a lille bit for Western Magnetics. Here’s a site that has some
> surplus heads, even a western magnetics onebut probably not th
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