On 3/11/22 07:01, Paul Birkel via cctech wrote:
.snip.
UTSOURCE claims to have a supplier of the ceramic part "new", with a
significantly higher shipping charge.
For what it's worth, I've ordered several times from UTSOURCE and the
results have been perfect. So far, I obtained a number of
Some folks asked for pictures and information about my Astrotype DECtape
project.
I've uploaded some pictures and other details to the web for your enjoyment.
http://xx2247.com
contains some photos and first-draft information about the components.
I'll update this site from time-to-time as
On 2/9/22 10:54, Michael Thompson via cctech wrote:
Date: Tue, 8 Feb 2022 20:55:31 +
From: Wayne S
Subject: Re: DECTape head problem
So it serms dectape heads are special. I don?t think Dec would have the
desire to make them internally so they probably contractef with a company
already
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
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
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
On 2/7/22 12:48, Marc Howard via cctech wrote:
The problem would be the non-standard track size and number of tracks.
However if at least one of the head's paired tracks is good you could
potentially cut the drive current in half and double the read amplitude and
just use one track for the
In debugging my DECtape interface lashup, I found that one of my head
has two open windings. Specifically, one channel has an open 'ground'
with the other two lines apparently the full winding of the channel.
The second channel failing has no continuity between any of the three
lines. I
Going through an old junk pile, I came across a couple of core boards:
Micro Memory, Inc.
PN 90360 8K*8 (MM-6800) Date code 7725
I have two boards (s/n 202 and 203) so likely purchased in pairs.
Anyone have any information on these? They have 86 pin connectors so
not S-100 though connector
On 1/25/22 12:24 PM, Chuck Guzis via cctalk wrote:
On 1/25/22 06:18, Paul Koning via cctalk wrote:
On Jan 24, 2022, at 10:27 PM, Gary Oliver via cctech
wrote:
...
As to the real reason I was doing this: Most of my tapes are un-boxed and have suffered
being in a dusty area (before I got
On 1/24/22 4:25 PM, David Gesswein via cctech wrote:
On Sun, Jan 23, 2022 at 03:09:53PM -0800, Gary Oliver wrote:
Taking the bits of tape, I exposed them to various concentrations of
isopropanol/water (from about 25% to 99% iso) and found than in all cases,
some of the data side of the tape
On 1/24/22 12:42 PM, Noel Chiappa via cctalk wrote:
> From: Gary Oliver
> Paul - thanks for the bitsavers reference.
Ahem!
In any case, it's Al who really deserves the credit, for finding that document,
and
putting it up.
Noel
Clearly Al is to blame :-) Yes, thanks to
On 1/24/22 11:09 AM, Chris Zach via cctalk wrote:
It sounds more like some sort of sprayed-on coating of some sort of
abrasion-resistent material. It might well be porous, which would be
a possible explanation for the oxide coming off when rubbed with solvent.
paul
Is it possible we're
On 1/24/22 7:30 AM, Paul Koning via cctalk wrote:
On Jan 23, 2022, at 8:40 PM, Noel Chiappa via cctalk
wrote:
From: Gary Oliver
I've always thought the physical tape wound on a DECtape spool was a
fairly conventional 'sandwich' of mylar/oxide/mylar ...
Was there some kind of 'lubricating'
I've always thought the physical tape wound on a DECtape spool was a
fairly conventional 'sandwich' of mylar/oxide/mylar, but a recent 'test'
makes me think there is something else involved.
I have a number of tapes I'm cleaning (removing dust, etc.) to make
ready to read on a restored
collected.
I have power supply documentation (copies), will try to get those scanned.
paul
On Oct 4, 2017, at 8:27 PM, Gary Oliver via cctalk <cctalk@classiccmp.org>
wrote:
I found the manuals for my unit, but it appears older than yours - perhaps one
of the original units.
The
I found the manuals for my unit, but it appears older than yours -
perhaps one of the original units.
The hardware manual describes the model "512-60 DIGIVUE display/memory
unit, D141."
The electrical connections are .1 inch dual-row edge-connector style; 60
pins for data/control (half are
What is the age requirement to be eligible for inclusion in the old
'computer collectors' list? :-)
-Gary
I've inherited an LA424-A2 printer that had been stored for a while but
now has obvious problems. Powering up 'jogs' the paper feed motor,
flashes the three green LEDS on the panel through a rapid sequence, but
then it stops with the display showing what appears to be a fault code.
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