[GreenKeys] reperf power backspace - how was it used?

[Nick England]

I have been getting a few M28 standalone reperfs running lately. Several
have power backspace which I can understand would be hooked up to a
keyboard key in an ASR or KTR.

But the ones I have are installed in standalone (ROTR) units with no
keyboard. Was there cabling to remote backspace from a KSR keyboard
somewhere else? Or do I just have random reperfs intended for ASR or KTR
use that have been stuck into these ROTRs sometime in the last 50 years?

A similar question goes for non-automatic tape feed-out, but that could
just be a button switch on the ROTR

If you haven't seen this feature, power backspace is a solenoid operated
gizmo which would back up the punched tape one character so you could type
a LTRS character to then correct a mistake. The power comes from a crank
arm on the end of the selector shaft -
http://www.navy-radio.com/tty/reperf/tt192-110619-04.jpg

A cool feature is on chadless tape reperfs where a rotating bar has fingers
to push the chad "lids" back into the tape so it doesn't get caught when
trying to back up. You can see the fingers poised above the tape here -
http://www.navy-radio.com/tty/reperf/tt192-ug-1205-03.jpg

Yours in teletypery,
Nick England K4NYW
www.navy-radio.com
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