So I'm clearing out projects on my bench. The latest is a Dec VT240
which did not work. Has been dead for 20 years, the usual so I figured I
would see if I could get it to run. This is a quick summary of what I
did in the hopes it can help someone else out someday.
First I got the service
At 11:25 PM 30/04/2022 +0100, you wrote:
>In trying to fix my M7133 CPU from my 11/24 I thought I had identified a
>failed 74S240. However, when I replaced it (while adding a socket), the
>fault remained. So, I guess the original chip may not be faulty. I decided
>to test the original chip on a
On 2022/04/30 4:28 p.m., dwight via cctalk wrote:
Yep. I didn't know it was now made by someone else. Also look at McMaster-Carr.
You might get a better price.
Dwight
I've used Dow Corning #4 electrical grease for a couple of decades. It
really helps preventing corrosion and reduces heating
Yep. I didn't know it was now made by someone else. Also look at McMaster-Carr.
You might get a better price.
Dwight
From: Ali
Sent: Saturday, April 30, 2022 3:23 PM
To: 'dwight' ; 'General Discussion: On-Topic and Off-Topic
Posts'
Subject: RE: cleaning up
On 2022-04-30 19:25, Rob Jarratt via cctalk wrote:
In trying to fix my M7133 CPU from my 11/24 I thought I had identified a
failed 74S240. However, when I replaced it (while adding a socket), the
fault remained. So, I guess the original chip may not be faulty. I decided
to test the original
> On 04/30/2022 5:25 PM Rob Jarratt via cctalk wrote:
>
>
>
> I noticed that the chip (original and replacement) was drawing 100-110mA
> from the bench PSU, which seems a bit high.
>
>
>
> I wondered if I might need a pull up resistor on the output, but my
> understanding is that this
In trying to fix my M7133 CPU from my 11/24 I thought I had identified a
failed 74S240. However, when I replaced it (while adding a socket), the
fault remained. So, I guess the original chip may not be faulty. I decided
to test the original chip on a breadboard to see if it is OK. This is where
I
> Once the corrosion is removed I recommend using DC-4 on the
> connections. It will protect the surfaces and keep great electrical
> connections. It is a silicon grease that is non-conductive but keeps
> the surface clean and improves metal to metal electrical contact. It
> doesn't allow oxides
Hi Will,
Is the punch you received capable of punching 8-level tape? While the PDF on
Surplus Sales of Nebraska's site says the unit can punch 5- to 8-level tape,
one of the photos on the site,
https://www.surplussales.com/Images/Equipment/Military/eqp-p135-20-35_2_lg.jpg,
makes it look like
A month or two ago, someone mentioned this paper tape punch available from
Surplus Sales of Nebraska.
https://www.surplussales.com//Equipment/mil.html
I think someone had a similar model and was looking for information.
I ordered one on Tuesday or Wednesday and got it today. It came with
Ken;
This worked perfectly!
I was able to mount the partitions (as shown below) and actually extract
the entire 65K partition to a *.dsk file that SIMH was able to mount and
read.
This is what I was trying to do. Get files from the RT11freewarev2 cd
into SIMH. From there I can get them to
Once the corrosion is removed I recommend using DC-4 on the connections. It
will protect the surfaces and keep great electrical connections. It is a
silicon grease that is non-conductive but keeps the surface clean and improves
metal to metal electrical contact. It doesn't allow oxides to build
hello,
I would ask for an advice on where buy the Misumi rubber bands.
I'm located in Italy.
Thanks
Andrea
On Wed, Apr 27, 2022 at 10:55 AM Douglas Taylor via cctech <
cct...@classiccmp.org> wrote:
> I wanted to extract some parts of the RT11 Freeware iso file that is
> available on the internet. The note Tom Shoppa wrote indicates that the
> CD has 2 partitions. When I burned the CD on a windows
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