TU56 Tape Heads

Pontus Pihlgren pontus at Update.UU.SE
Sat Aug 6 11:58:05 CDT 2016

On Fri, Aug 05, 2016 at 03:41:32PM -0500, Tom Uban wrote:
> I have a linctape drive, which is a dectape compatible unit. I do not have
> the controller or any documentation, but it does have a head which might be
> useable to replace the broken head. If this would be useful, I would be
> willing to contribute it to the cause.

Please don't scavenge a LINCtape. it would be more valuable on a LINC or PDP-12 which are 
must rarer.

> Please see attached pics.

The list strips pics. Send separately or put on the web.


> --tom
> On 7/25/16 7:03 PM, Michael Thompson wrote:
> > During our PDP-12 debugging today we found that the left tape head has an
> > open coil for data track 0. The left head was OK a little more than a year
> > ago when we found the open coil in the right head. One TU56 head on my
> > personal PDP-8/e also had an open coil when I got it.
> > 
> > Our guess is the chemicals from the epoxy potting, possible flux residue,
> > and poor soldering are causing the failures. Getting the epoxy potting out
> > to repair the solder connection has proved impossible so far.
> > 
> > Any source for three TU56 tape heads would be appreciated.
> > 
> > We are also interested in ideas on how to get the epoxy potting out without
> > destroying the head.
> > 

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