What is a Vibroplex key?
Vibroplex is the brand of side-to-side mechanical, semi-automatic Morse key first manufactured and sold in 1905 by the Vibroplex Company, after its invention and patent by Horace Greeley Martin of New York City in 1904. The Vibroplex Company has been in business continuously for 114 years, as of 2019.
What is a telegraph bug?
During the 1870s, long before the semi automatic key was invented, a “bug” to telegraph engineers, inventors and telegraphers had a very specific meaning. It was commonly associated with false signals that were heard on early multiple telegraphy circuits, specifically on duplex and quadruplex circuits.
Who owns Vibroplex?
Robbins — who has been employed with Ten-Tec Inc since 1995 (he has been Product Manager for Ten-Tec’s Amateur Radio equipment line since 1997) — will leave his position in mid-December to take over full-time management and ownership of Vibroplex.
How do you date a Vibroplex bug?
If the serial number of your bug is between about 175,000 and 275,000, it’s easy to tell which model you have — just turn it over. The model name should be stamped on the underside of the base. Three models are particularly distinctive — the Upright, Midget, and Double Lever.
What is iambic keying?
Iambic keying involves squeezing both paddles – the first paddle to make contact sends its element (dit or dah) immediately followed by the opposite element. This continues as long as one or both paddles are squeezed. This allows many CW characters to be sent more efficiently.
What is iambic B?
Mode A and B refer to the way that a Morse code keyer handles iambic (squeeze) keying so first, let’s define iambic keyer operation. An iambic keyer will send an alternating sequence of dits and dahs as long as both the dit and dah switches are depressed or squeezed. It consists of two separately actuated switches.
