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, Gary Oliver via cctech <> 
> wrote:
> 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 affected channel.
>> Marc
>>> On Mon, Feb 7, 2022 at 12:33 PM Wayne S via cctech <>
>>> wrote:
>>> 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:
> Further, the DECTape had various track-to-track spacing.  Between the the 
> Mark track and the first data track on both edges, the spacing is at a little 
> less than twice that between the mark and timing tracks or between each set 
> of data tracks.  Put a different way, the track spacing is:
> T.M..D.D.D.D.D.D..M.T
> The magnetic poles of each head is roughly 1mm wide with about .8 mm spacing 
> heads  The '..' in the above means there is about 1.4mm spacing (between 'M 
> and D' and 'D and M', for example - the measurements are crude, so I could be 
> off 20% or more.)
> I've searched the documents I have (many from bitsavers) and haven't yet 
> spied a specification for the head design.  I suppose if I could determine 
> the head 'gap' and knowing the magnetic flux required of the tape (with 
> proper margins) and knowing the stated impedance of the head and drive 
> current, I could figure out how many turns of some size wire is required 
> (looks to be at least as small as #40).
> Back when I was a bit younger and less experienced (and didn't know it was 
> impossible,) I actually 'repaired' (for some definition of 'repair') an old 
> 1/4 inch tape head.  But all I did was pull some wire off the coil and 
> delicately soldered a tap to this wire.  It worked ok for a couple of years 
> but was obviously failed again from rough handling.  Fortunately it was 
> 'easy' since there wasn't a bunch of clear epoxy in the way ;-)  I'm not sure 
> today I would have the temerity to even try.
> Hoping one will show up someday and I can make a deal as to complete my unit.
> Thanks to all who have replied.
> -Gary

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