On the Emulation of TU58s

Mark J. Blair nf6x at nf6x.net
Tue Jun 16 14:40:49 CDT 2015

> On Jun 16, 2015, at 12:31 , Paul Koning <paulkoning at comcast.net> wrote:
> Part 1: two capstans spinning all the time, in opposite directions.  Solenoid-activated pinch rollers would press the tape against the capstan to set it moving.

That's also how the magnetic card is moved in and out in the Mag Card II typewriter. There's a pair of counter-rotating capstan wheels below the card, and a pair of solenoid-actuated pinch rollers opposite them, above the card. The head is moved from track to track with a solenoid-actuated escapement that lets the head move one track at a time under spring pressure, and then yet another clutch lets a free-running roller grab a cable to pull the head back to the first track.

I have one waiting for my attention. I think the job will be much more mechanical than electronic!

Mark J. Blair, NF6X <nf6x at nf6x.net>

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