Question about DECtape formulation

Paul Koning paulkoning at
Mon Jan 24 11:17:16 CST 2022

> On Jan 24, 2022, at 10:56 AM, Jon Elson via cctalk <cctalk at> wrote:
> Back in 1971 or so, we had a PDP-5 with DECTapes, and bought 3/4" analog recorder tapes surplus to make up new tapes.  It was much thinner than DECTape, and we had print-through issues of tapes that were stored for a few weeks. That seemed to clear up if the tapes were then used again.  I guess the permeability was not as high as real DECTapes.
> Jon

It may also be a case of wrong shape hysteresis loop.  And standard tape isn't usually sandwich tape as DECtape is, so it would wear fast.


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