[GreenKeys] Teletype model 17

[Steve]

As often happens when researching a project on the 'net I get off
on an interesting tangent. This is one of them. The Teletype model 17
was a Hellschreiber machine. The only info I've been able to find on
it is here;

https://www.nonstopsystems.com/radio/hellschreiber.htm

Has anyone seen or owned one? While my primary interest is in TTY,
I've been fascinated by this mode (Hell) since first reading about it in
the Dec 1979 issue of HAM RADIO magazine. Found a Japanese version
a couple of years ago that is in the que for restoration.
Steve W6SSP
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