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Simplified diagram of how a tonewheel works Goldschmidt tone wheel (1910), used as an early beat frequency oscillator. A tonewheel or tone wheel is a simple electromechanical apparatus used for generating electric musical notes in electromechanical organ instruments such as the Hammond organ and in telephony to generate audible signals such as ringing tone.
The first Hammond in production. Two 61-note manuals, 25-note pedalboard, 2 x 9 drawbars per manual, 2 pedal drawbars, 9 presets per manual, a tremolo effect generator ("tremulant"). [5] A-B: 1936–1938 [5] /1942 [6] After the introduction of Model B-C in 1936, previous Model A was available as Model A-B. [5] / B series actually starts with ...
A digital accordion may also be called an electronic accordion, MIDI accordion, or reedless accordion. Some instruments referred to as "MIDI accordions" may be hybrid acoustic-electronic instruments, [1] in that they contain the traditional acoustic elements (reeds, bellows, valves) with sensors and electronic circuitry that converts button and key presses and bellows pushing and pulling into ...
Some telephone technicians used mnemonic phrases, such as red-right-ring-rear, or ring-right-red-rough, to remember that the red wire connects to the right-side post in the wall jack and to the ring on the plug and to the rear lug on main distribution frames. Sometimes rough or ridge was added for jumper wires with a tactile code. [citation needed]
A diagram showing a wiring modification for a Les Paul or a similar electric guitar with two humbuckers. Wiring schemes using four push-pull pots for additional pickup combinations were made popular by Led Zeppelin guitarist Jimmy Page and later produced as a signature model by Gibson. The modification shown in this diagram is an evolution of ...
The E-100 series was a cost-reduced version of the A-100 introduced in 1965, with only one set of drawbars per manual, a reduced number of presets, and a slightly different tone generator. [62] This was followed by the H-100 series, with a redesigned tonewheel generator and various other additional features. [ 58 ]
The stepped-tone generator [49] is a circuit that utilizes a 556 dual timer IC. The controls are two potentiometers. Mims titled the circuit "Sound Synthesizer" in 1982 [50] then later called "Stepped-Tone Generator". The circuit creates sounds similar to a plucked violin. [49]
A split-phase motor has a secondary startup winding that is 90 electrical degrees to the main winding, always centered directly between the poles of the main winding, and connected to the main winding by a set of electrical contacts. The coils of this winding are wound with fewer turns of smaller wire than the main winding, so it has a lower ...
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