@thomasfuchs i did wonder whether this and Curtis Electromusic were connected, but it appears not: here's an obituary for Jack Curtis, the man behind this:

arrl.org/news/curtis-keyer-chi

@thomasfuchs Holy dooley that beauty has everything.The sort of pedigree that comes with a full circuit diagram and component list in the manual.

@thomasfuchs always nice to have those spare A,B,C,D keys in case you need them

@thomasfuchs Those Keyboards are designed for people who are able hear code faster than a regular key or paddle can give the code.

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