![]() Martin patented the first in a line of devices which solved the problem: the Martin Autoplex, an electro-mechanical sending device which required batteries. ![]() However, the early telegraph keys used to send messages caused severe strain on the telegrapher's wrist - a condition now known as carpal tunnel syndrome. ![]() THE VIBROPLEX STORY A revolution in communcation occurred with the development of the telegraph. Vibroplex Bug Telegraph Paddle Key #235496 Amateur Radio Morse Code Vibrokeyer. Characteristics such as style of the hardware, paint finishes and color, type of plating, serial number. ![]() I have provided descriptive information to assist the interested collector or owner of Vibroplex semi-automatic keys in identifying the various models and determining their authenticity. A report on identifying and dating Vibroplex Bugs by Paul Bock - K4MSG of Hamilton, Virginia. ![]()
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