>
> From: Gary Oliver
> Subject: DECTape head problem
>
> 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 fail
DECtapes have 5x redundant tracks. If you could find an 8-track head that
had the same track pitch, and maybe track width, you could read the tape
but lose redundancy on the Mark and Timing tracks. That probably would not
work with a marginal DECtape.
On Mon, Feb 7, 2022 at 3:33 PM Wayne S wrote:
I wonder if there are any professional audio multi-track recorders that
match the tape width, number of tracks and tack pitch and have the
necessary frequency response.
On 2/7/2022 3:05 PM, Marc Howard via cctech wrote:
8 track tapes use 1/4" wide tape. Most 8 track units use heads with only
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 affect
> 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
> 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
On 2/8/22 15:49, Paul Koning via cctalk wrote:
The maintenance manual (on Bitsavers) speaks of a "read/write head" and has an
illustration that shows one of the head elements with a "read/write coil". So the
implication is that (a) there isn't an erase head, and (b) the same head serves for
>
>
> 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 set up to do
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
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 I
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