Saturday, May 17, 2014
TELEGRAPH KEYS AT 2014 DAYTON HAMVENTION
A selection of old keys -- and one new one -- from the Dayton Hamvention:
"Pendograph," with a base-supported vertical pendulum for forming dits.
Pendograph close-up. The owner let me try it -- very nice feel. It's a
"release of tension" design like the Mecograph: the reed is flexed at
rest, and released to vibrate when you work the left paddle.
"Automorse," an Australian-made fully-automatic mechanical key.
Full-auto for International Morse, as used on radio, anyway: the third
paddle is for the long dahs of landline Morse, and that's manual.
This is a Mecograph, one of two versions.
The original machine for live coverage of news -- cut into the nearest telegraph wire and get to sending! You see these in old photos of press coverage of sporting events and Presidential appearances.
A full-auto, all-mechanical key built by Indy's own brilliant Richard Meiss. He knows more about the physics of bug keys than any man alive. This key is palm-sized, and uses a mechanically-varied mass to switch between dits and dahs.