VIBROPLEX is the oldest continuously operating business in Amateur Radio, founded in New York by Horace Martin, inventor of the semi-automatic Morse Code key in 1905.

Today, 110 years later, VIBROPLEX is located in Knoxville, TN, USA and continues to manufacture the original Martin key ("Original bug") as well as a complete line of some 30 keys including bugs, iambic paddles, single-lever paddles and traditional straight keys. These keys are manufactured in the United States of America in our offices in Knoxville.