Re: Restoration of Reel-to-Reel Tapes

"Ivan Katz" <ivan.katz42@xxxxxxxxx> wrote in message
news:fgdtep$j61$2@xxxxxxxxxxxxxxxxxxxxxxxxxxxx
The tape, when it's squealing, is vibrating like a violin string being
pulled by a bow. This causes both amplitude (as it's bouncing off the
head) and frequency (as it jerks along rather than moving smoothly)
modulation of the induced electrical current as the magnetic field
(recorded on the tape) moves across the head gap.

Gotcha!!
I figured it was something like that, but was never really sure.
FWIW squeeky cassette tapes (usually crap Supertape stuff left in the car
etc) were the worst for that!

Bad cassettes can also have bad slip-sheets, the flat doohickeys in the
cassette shell that the tape spools ride against. And they can have pad
pressure pads as well, or idlers that squeal.

Peace,
Paul


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