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
>
>
> 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 2/8/22 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 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 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 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
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 same company. There’s also a tape head from M
> 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
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?
Sent from my iPhone
> On Feb 8, 2022, at 12:07, P
> 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
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 on the dectape heads?
Sent from my iPhone
> On Feb 7, 2022, at 22:56,
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
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
8 track tapes use 1/4" wide tape. Most 8 track units use heads with only
two tracks implemented. There was a stepper solenoid that moved the head
down (or up after all 4 stereo programs were played). Growing up in the
60s you never forget things like listening to In-A-Gadda-Da_Vida fade in
the m
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:
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 affected channel.
Marc
On Mon, Feb 7, 2022 at 12:33 P
I’ve often wondered if the tape heads from consumer tape devices such as
cassette or 4-8 track tape players could be used or be made to be used as
replacements. Anybody ever try that?
Sent from my iPhone
> On Feb 7, 2022, at 11:51, Michael Thompson via cctech
> wrote:
>
>
>>
>>
>> From:
>
> 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
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