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, Paul Koning <> wrote:
>> 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 on the dectape heads?
> The schematics are bound to show DEC part numbers, but how those translate 
> into supplier part numbers is anyone's guess.  Or perhaps they were made 
> internaly by DEC?
> In any case, DECtape heads are unusual.  Computer tapes are normally 1/2 inch 
> wide (a few old tape drives had different widths, like the 14 track 1 inch 
> CDC tape).  But DECtape and LINCtape are 3/4 inches wide, with 10 head 
> positions.
> Audio tapes are unlikely to be helpful; consumer reel to reel tape is 2 
> tracks (interleaved for when you flip over the reel?) 1/4 inch; professional 
> decks might have 8 tracks or more on 1/2 or 1 or 2 inch wide tape, but I 
> don't remember ever seeing 3/4 inch wide audio or instrumentation heads.
>    paul

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