Sorry....this was meant to go to just Josh, but accidentally copied to the list.
The Old Calculator Museum
From: cctalk [mailto:cctalk-bounces at classiccmp.org
] On Behalf Of Rick Bensene via
Sent: Tuesday, February 11, 2020 8:26 AM
To: Josh Dersch; General Discussion: On-Topic and Off-Topic Posts
Subject: RE: IBM Type 31 Alphabetical Duplicating Keypunch available, Seattle area
I can't possibly think about getting this wonderful old beast from you, but something
about the photos captured my curiosity.
In the background of one of the photos (#1, IIRC) is the front panel of what appears to be
a 12-bit computer (ala PDP 8), but the panel is most decidedly not DEC. It has a label on
it that says "BR 2412". It appears that there is a second one of these
located directly below this panel. These are in a rack that appears to have a PDP 8/e
mounted above them.
The question is...what is this "BR 2412" machine?
I have managed to get TSS-8 running on two terminals on my 8/e. I configured a third
serial card for current loop and 110 baud to try to get my Teletype running on it as a
third terminal, but I can't get any response out of it. I did reconfigure TSS-8 for
the third terminal. I think that the problem might be the serial board not generating
interrupts, and I was just getting going on troubleshooting using my trusty Tektronix 2465
scope, when the scope died. Something went amiss in the horizontal deflection such that
the trace is pushed off the left-hand side of the tube. Beam Finder does put the trace in
the center of the screen, albeit all squished. I opened the scope up and checked all the
connectors and switches, and all else I could think of, but nothing made any difference.
Arrggh. So, then I went to get my old backup, a 465, which last I used, worked. But,
something is not right with its high voltage supply...the trace slowly fades away over the
course of about 5 minutes. Turn it off and let it cool down, and the trace comes back,
for a couple of minutes. So, I have no oscilloscope. I lost interest at that point,
but figure I can use the logic analyzer to figure out if the interrupt is being generated
without too much trouble...just need to get the motivation to fiddle with it.
Complicating things is that about three weeks ago, I woke up in the morning, and as I went
to get out of bed, I felt something in my lower back twinge, but didn't really pay
attention to it. As I went to put my weight on my feet, my left leg collapsed, and there
was a sharp pain in my lower left back. From that moment on, I've been in extreme
pain in my lower back, extending to my groin, then down the front side of my left let to
the knee. I called my doctor, and went in. He took XRays and the diagnosis was spinal
stenosis (narrowing of the spinal cord canal) due to arthritis, as well as a bulging disc
in the lumbar vertebrae. All of this is causing a bundle of nerves that serve the upper
left leg to be pinched, and thus...the pain. My doctor said that in order to figure out
treatment, an MRI would be needed. The insurance company denied two requests he made to
get the MRI. I ended up calling the insurance company and letting them know that I was
both in incredible pain, as well as pretty much made immobile by this, and without the
MRI, I would not be able to be treated, which was unacceptable. The finally relented, and
allowed the MRI, but this whole escapade took about a week. Then, getting scheduled for
the MRI took another five days, and another three days to get the MRI reviewed by a spinal
specialist. I was then referred to the spinal specialist, and it took four days to get
that on the schedule. I went to that appointment, and he said that there were two
options, surgery or a combination of cortisone and platelet-rich plasma by injection into
the affected area. I opted for the injection, as the specialist said in cases like mine
that the success rate (e.g., relief of the pain) was better than 85%. Surgery will also
fix it, but the recovery time is longer, and there are far more chances for complications.
I go in tomorrow for the CT-guided injections. I should get relief within 3 to 7 days.
Fingers are crossed it works, and there are no complications.
I am still looking for a job. I had a good prospect week before last, did well in a phone
screening, and asked to come in for an in-person interview. However, I was terribly
sleep-deprived, as well as in terrible pain from my spine issue when I went in for the
in-person interview, and though I had thought I did OK (I made no mention of my back
issue/pain), apparently it wasn't good enough, even though I had tons of experience in
the areas they were looking for and could prove it, they wrote me on Friday (the interview
was last Thursday) saying they had picked someone else. Nothing else on the horizon, and
finances are not good. I keep applying for jobs, but either get no response at all, or
get messages saying "thanks, we'll keep your information on file...".
Anyway, I my curiosity got the best of me when I saw that odd front panel in the
background and figured I'd drop a quick line your way.
Hope things are going well for you.
From: cctalk [mailto:cctalk-bounces at classiccmp.org
] On Behalf Of Josh Dersch via
Sent: Monday, February 10, 2020 3:35 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: IBM Type 31 Alphabetical Duplicating Keypunch available, Seattle area
(resending as this appears to have gotten eaten last time...)
Hi all --
As the subject line says I've got an IBM Type 31 Alphabetical Duplicating
Keypunch sitting in my basement, in the Seattle area.
It's in well-loved but decent physical condition and appears to be
completely original. I have not powered it on (still has the original
selenium rectifiers in it, for one thing) but mechanically it seems fine.
No rust or obviously damaged parts, but it's clearly gotten a decent amount
of use since the 1930s.
It's really cool but it's not really something I'm interested in keeping --
if any of you are interested or know someone who is interested, please feel
free to make an offer. Due to the size and fragility of the item I don't
want to ship this thing.
Pictures are available here: