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Something I’ve been wondering about the 6 needle telegraph encoding is if it was ever actually designed or built by cooke/wheatstone. The only reference to it I could find online is Wikipedia saying that a six needle code ‘could be used to encode 30 characters’. However was this design/idea ever actually used, or if its more of a historical-stretch of the 5 needle used for the challenge so you can encode the full alphabet?
@pi_enthusiast That’s a good question.
I don’t know the answer, but from what I have read, it seems unlikely that a six needle telegraph would have been deployed, between distant sites, given the difficulty and expense of installing and maintaining the multi-wire conductors between the terminals. I don’t know, but guess protypes may have been built and tested in a workshop environment, but it sounds unlikely they would ever have been deployed.
The following web site provides excellent background:
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