Hi,
I thought the OP-80A could read both 5-Level and 8-Level paper tapes?
I wish somebody here in the USA made OP-80A kits … the guy in the UK quit, but won’t publish his Gerber files.
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C U L8r, °|° Walt Perko °|° "Kids ... teach them the good stuff, and they still learn the bad stuff on their own."
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Sent from the Cyber7
I rescued a couple of TTY Wheatsone punches in their lovely wooden cases, and a Boehme reader, from the old Mare Island Naval facility. The machinery has all gone to good homes where it will be displayed.
However, there were also many large reels of punched tape. I’m currently midway thru fabricating a photoelectric reader head, and I’ll program an Ardiuno or Raspbery Pi to read them.
It’s a little tricky because the decoder must discern four states: ‘ one sprocket only’(inter character gap), ‘two sprockets only’ (inter word gap), ‘sprocket plus both holes’ (a DIT), or ‘sprocket plus one hole, then sprocket plus a second hole’ (displaced by one sprocket hole in time; a DAH).
The original System, all mechanical, was said to have been able to work at up to 500 WPM… dang……
Anyway, I’m looking forward to seeing what is on these old tapes. Its not particularly difficult to read them visually, just tedious and I’m lazy.
HIHI
Wiki article: https://en.wikipedia.org/wiki/Wheatstone_system
Cheers
John KB6SCO
Casrson City