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Additional
tonewheel
English Wikipedia - The Free Encyclopedia
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Tonewheel
A
tonewheel
or
tone wheel
is a simple electromechanical apparatus for generating electronic
musical notes
in electromechanical
organ
instruments such as the
Hammond B-3
. It was invented around 1910 by
Rudolph Goldschmidt
and was first used in pre
vacuum tube
radio receivers
as a
beat frequency oscillator
(BFO) to make
continuous wave
radiotelegraphy
(
Morse code
) signals audible.
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