[GreenKeys] Wheatstone Tape setup 1930

[Nick]

 Nick, was there ever a machine to decode a CW signal in the old days ???
..... something similar like a teletype machine?

The other Nick  -  N0NCQ



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-------- Original message --------
From: Nick England <navy.radio at gmail.com>
Date: 7/12/21 3:19 PM (GMT-05:00)
To: harold at w6iwi.org
Cc: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] Wheatstone Tape setup 1930

AFAIK, there were basically three paper tape systems used for training and code practice.

1) By far the most common commercial system was the Instructograph. It used dot and dash sized perforations as you suggest. Lots of ham clubs and FCC examiners had them.
https://m.youtube.com/watch?v=YEaXMsmAMj8

2) Second most common for training were the US Army TG-34 units which used inked tape and a photoelectric reader.
https://m.youtube.com/watch?v=-ac4wO06X9s

3) Much rarer for training were US Navy AN/UGH-1 units which read Wheatstone perforated tape. They were made by the same company as the Army units.
https://www.navy-radio.com/morse/training/ugh1-120301.JPG
McElroy also made a Wheatstone tape reader
https://m.youtube.com/watch?v=j-KDUpvMZfA


For actually sending messages, the Wheatstone system was essentially the only one in use because you could easily compose tapes from a keyboard perforator. I don’t know of a keyboard composer for either of the other two systems.

I suspect inked training tapes were produced by composing on a Wheatstone system and that tape fed a keyer connected to an ink recorder. I don’t know how Instructograph tapes were prepared. That company sold sets of training tapes.

Nick

On Mon, Jul 12, 2021 at 2:27 PM Harold Hallikainen <harold at w6iwi.org<mailto:harold at w6iwi.org>> wrote:
I saw a Morse tape reader in an antiques store years ago. It was part of a
code practice system. Should have bought it! Also, the FCC office in San
Francisco had one of these when I took my license exam in 1969.

It's interesting that they used separate areas of the tape for dot and
dash with the same sized hole for each. It seems like it would be a lot
simpler to use variable sized holes (a dot punch and a dash punch) on the
perforator side. The reader would then just pull the tape through at a
constant speed. It would use more tape, but the reader would be a lot
simpler.

Did anyone do something like this?

Harold
https://w6iwi.org




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