List of Hammond organs

The Hammond organ is an electric organ, invented by Laurens Hammond and John M. Hanert^[1] and first manufactured in 1935.^[2] Various models were produced, which originally used tonewheels to generate sound via additive synthesis, where component waveform ratios are mixed by sliding switches called drawbars and imitate the pipe organ's registers. Around 2 million Hammond organs have been manufactured, and it has been described as one of the most successful organs ever.^[3] The organ is commonly used with, and associated with, the Leslie Speaker.

Tonewheel organs

Tonewheel organs generate sound by mechanical toothed wheels, that rotate in front of electromagnetic pickups. Each tonewheel assembly creates tones with low harmonic content, close to a sine wave. Inside the coil is a permanent magnet. As the teeth of the tonewheel pass by, the strength of the magnetism changes—when the tip of a tooth is closest to the tip of the magnet, the magnetism is strongest. As the magnetism varies, that induces an alternating current (AC) in the coil, which becomes one of the frequencies used in harmonic synthesis.^[4]

Image	Model Name / Number	Years produced	Description
	A	1935–1938[5]	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-100	1959–1965[6]	A B-3 / C-3's internals in an integrated package with power amp and speakers[7]
	B-A	1938[8]	Model B-C style organ with built-in player organ mechanism[9] (possibly Duo-Art), custom built by Aeolian-Skinner.[10]
	B-C	1936–1942[11]	The first organ produced in the deeper Model B cabinet, to accommodate the chorus generator[11]
	B-2	1949–1954[12]	Model B style cabinet with variable vibrato (V1, V2, V3, C1, C2, C3)
	B-3	1954–1974[13]	The best known Hammond. Similar to the B-2, but with the added harmonic percussion circuit. Made famous by Jimmy Smith who influenced numerous other players.[14]
	C-2	1949–1954[12]	Model C style cabinet with variable vibrato (V1, V2, V3, C1, C2, C3)
	C-3	1954–1974[13]	The second best known Hammond. Similar to the C-2, but with the added harmonic percussion circuit
	D	1939–1942[8]	A model C organ with factory supplied chorus generator
	D-100	1963–1969[15]	Internals of an RT-3 with built-in amp and speakers
	E	1937–1949[16]	The first attempt at a full size American Guild of Organists (AGO) 32-note pedalboard. Also included four toe pistons
	E-100	1965–1970[17]	A cut-down version of the A-100
	E-200	1965–1971[18]	A version of the E-100 specifically designed for churches
	E-300	1965–1969[19]	A version of the E-100 with additional "harp sustain" feature
	G-100	1964–1967[20]	Non-drawbar tonewheel organ. Included 65 stop tablets, 12 couplers, 18 thumb pistons, 8 toe pistons. Also known as the Grand-100
	H-100	1965–1969[21]	Tonewheel organ with additional features. Not generally considered to be particularly popular.[22]
	H-200	1969–1975[23]	Version of the H-100 designed for churches and theatres
	HX-100	1970-1975	Version of the H100 in a pseudo X66 case for stage work. Supplied with D10 speaker.
	L-100 series	1961–1968[16]	First Hammond to retail for under £1,000. Much abused by Keith Emerson.[24] L-122A has extra percussion voices. L-222 came with an integrated keyboard cover or fall.
	Porta B series	1971–1974[25] (1970[26])	Portable version of L-100 series for professional use.[26] There were several versions on each country, built by different factories:[27] L-100NS / L-PNS-100 – USA version (LP-100 ?) L-100-PN / L-100PNS – Belgian version, also sold in Netherlands. S means a version with sustain pedal. P-100 / L-100-P – converted L-102, sold in Germany and Denmark. P-100-S – a version with sustain pedal (1972–1974) P-100-H
	M	1948–51[12][28]	First spinet organ. 2x44 key manuals, 12 note pedalboard.
	M-2	1951–1955[12][28]	An M with selectable vibrato
	M-3	1955–1964[12][28]	An M-2 with B-3 / C-3 style harmonic percussion
	M-100	1961–1968[29]	Tonewheel spinet organ, replacing the M series. Includes presets.
	R-100	1970–1975[30]	E-100 style organ with transistor / solid-state power amp and built-in Leslie
	RT	1949	Replacement for the Model E. Tonewheel organ similar to DV but with 32 note AGO pedalboard
	RT-2	1949–1954[6]	Like a C-2, but with a full 32 note AGO pedalboard
	RT-3	1954–1969[6]	Like a C-3, but with a full 32 note AGO pedalboard
	T-100 series	1968–1975[31]	A tonewheel spinet with a transistor / solid-state power amplifier T-200: T-100 with built in leslie and extra percussion. T-400: as T-200 but with Drum machine. T-500: as T-400 but revised case.Last tonewheel built. XTP: Futuristic T-500 with pull out speakers leaving organ on pedestal.
	X-66	1967–1973[32]	12-tone tonewheel generator with frequency divider and various additional features
	X-77	1968–1973[33]	A restyled H-100, designed to replace the B-3. Had its own Leslie cabinet, the X-77L

Two models in Church-styled cabinet were made under military specifications, and named G (G for "Government contract", with chorus), and G-2 (with vibrato), to be installed in chapels and officer's messes of U.S. Army and Navy.

Vacuum tube musical instruments

Vacuum tube musical instruments mean electronic musical instruments generating sound with vacuum tube-based electronic oscillators. Hammond Organ Company commercialized it in the late-1930s as Novachord (1939–1942) and Solovox (1940–1948). Especially, new designs introduced on Novachord — subtractive synthesis and frequency divider — were immediately followed by many manufacturers of electronic organs and polyphonic synthesizers during the 1940s-1970s. However, Hammond Organ Company did not adopt these on main products until the late-1960s, except for S series chord organ (1950–1966) and "Solo Pedal Unit" on RT series and D-100 (1949–1969).

Image	Model Name / Number	Years produced	Description
	Novachord (model H)	1939–1942[34]	First commercial polyphonic synthesizer. Although Novachord itself is not referred to as an electronic organ, its basic design became mainstream, being implemented in electronic organs and polyphonic synthesizers during 1940s-1970s.
	Solovox (model J,K,L)	1940–1950[35]	Monophonic attachment keyboard instrument, intended to accompany the pianos with lead voice of organ and orchestral sound. It consists of two units — a 3-octave mini keyboard attaching under the piano keyboard, and a tone cabinet including electronic sound generator, amplifier and loudspeaker.[36] The sound generator is based on a vacuum tube oscillator and octave divider circuits originally designed for Novachord. There are three minor changed models:[35] Model J (1940–1946) Model K (1946–1948) Model L (1948–1950)
	Solo Pedal Unit on RT series and D-100	1949–1969[6]	Solo Pedal Unit (or Pedal Solo Unit) provides a monophonic bright bass sound on RT series and model D-100 consoles, layered with tradiotional polyphonic tonewheel pedal sound. Although Solo Pedal Unit is highest-note priority and it can play only one note at a time, the players can play polyphonic bass lines by the help of traditional pedal sound. The sound generator is electrically similar to Solovox Model L. It consists of a vacuum tube oscillator and five frequency divider circuits, controlled by a volume and 8-stop tablets (Bourdon 32', Bombarde 32', 16', 8', 4', 2' & 1', mute, pedal solo on) placed on the right side of lower manual. Although there are five revisions of units, these are interchangeable on all RT series consoles.[37]
	S series Chord Organ	1950–1966[38]	First chord organ. Its "easy to play"[39] style initiated a new market segment leading to today's home keyboard market.[40] The S series Chord Organ can be played via following interfaces:[38] 37-note keyboard for solo or chords 96-chord buttons (12-semitones × 8-chords variation) for chords 2 wire touch-plates for strumming effect 2 bass pedals for root & 5th 1 expression pedal (or knee lever) for total volume control 3 volume knobs for volume of each part (solo, chord, bass)

Transistor organs

Hammond started to produce transistor organs when the production of tonewheels became too expensive, switching to full-time Integrated Circuit (IC) models in 1975.^[41][42]

Image	Model Name / Number	Years produced	Description
	Aurora (Century, Custom and Classic)	1975[26]	First composite spinet organ with both drawbars and electronic voices, no tonewheels. Classic top of range with strings brass and presets.Final model had pro-chord.
	B3000	1978[43] (or 1975[44])	Solid-state copy of the B-3, with additional string division, electric and grand pianos. Key click was re-introduced.[26] Supplied with matching Leslie HL-722.
	Cadette (model V,VS)	1969–1970s[45][46]	Entry-level all-tab transistor spinet organ, no tonewheels. This series were all designed in the United States, built in Japan, and subsequently also assembled in England: Initially, first series were built by Yamaha (c.1969–), then by Nihon Hammond during 1973–1975. Subsequently Hammond UK began to import these models in kit form, and assembled in proper wooden cases for domestic market.[45][46]
	Colonnade	1979[47] or 1982[48]	Console version of Aurora Classic.
	Commodore	—	Single set of drawbars.
	Elegante	1980s	Hammond 1980`s Flagship 2 x 61 note manuals,25 pedals everything on it.
	Concorde	1972 - c.1977[49] (or 1973[26])	First LSI-based Hammond console organ with drawbars, no tonewheels.[26] This model was once erroneously advertised as a next generation top model take over the X-77, called X-99; though, its official name was a Concorde.[50]
	Cougar	1973–1976[51]	Transistor spinet organ with drawbars, in some extent, corresponded to a kind of successor of L-100 series tonewheel spinet organ, although its new drawbars arrangement is slightly exotic; its upper manual has normal nine drawbars; on the other hand, lower manual has only two 8' drawbars with sawtooth. This anomalous design was only followed by a few models (8000 series, 8100 series, and 8200 Aurora series).[51]
	Dolphin	1973–1976[52]	Spinet organ with built-in polyphonic synthesizer and 20 one finger chords.
	J-100	1967–1968[53] (Late 1960s[31])	Transistor spinet organ - no tonewheels
	Maverick	1973–1975[54]	Middle-priced all-tab spinet organ.
	Phoenix	1972[26]	First LSI-based all-tab Hammond spinet organ.
	Piper Autochord	1970–1979[55]	First automatic chording instrument. Single manual, with automatic rhythm, automatic chording and no bass pedals.[26][56]
	Portable B-100	1980–1984[57]	Single manual version of B-250.[57]
	Portable B-200	—	Successor of X-5, portable version of Aurora 8222.[58]
	Portable B-250	1980–1984[59]	2 x 61 note manuals.[59]
	Portable B-300	—	B-200 plus strings, portable version of Aurora Classic 232000.[60]
	Portable B-400	—	Only drawbars to upper, drum machine and Midi.[61]
	Portable X-2	1978[26]	Single manual version of X-5.[62]
	Portable X-5	1979[12]	Portable spinet, transistor copy of the B-3 (or Porta B), derived from Ace Tone GT-7[63] circa 1971. Manufactured by Nihon Hammond, a Japanese joint venture between main company and Sakata (parent company of Ace Tone).
	Regent	1973–1976[64]	First all-tab theatrical-style Hammond organ.
	Romance series	1977–1983[65]	Integrated circuit generated spinet organ. No drawbars.
	Sounder	1973[26]	First Hammond to retail for under $500, sold through both music and mass merchant outlets. Single manual organ.

Digital organs

After the Hammond Organ Company ceased trading in 1985, production initially went to Noel Crabbe's Hammond Organ Australia, and then to Suzuki Musical Instrument Corporation, who, under the name Hammond-Suzuki, manufacture digital organs.^[66]

Image	Model Name / Number	Years produced	Description
	Super B	1986[48]	First full-digitally sampled Hammond organ, with dual manual, downloadable voice tables, and MIDI.[48][67]
	XB-2	1991–1998[12]	Single manual organ. First digital organ produced by Hammond-Suzuki.
	XB-3	1993–1998[68]	Dual manual organ with 4 sets of drawbars, reverse colour presets and waterfall keys.I an extended B3 case.
	XB-5	1993[68]—?	Two manual organ with two sets of drawbars and bass drawbars.[69]
	XM-1 / XM-c1	1997–2005[68]	MIDI organ module (XM-1) with drawbar controller (XM-c1)
	XB-1	1998–2005[68]	Standalone version of the XM-1
	XK-2	1999–2004[70]	Improved XB-2 with waterfall keys
	XE series	—	XE-1 / XE-2 / XE-200: Modular all singing and dancing single manual modular organ (XE-1), dual manual(XE-2), and built in cabinet (XE-200)
	New B-3	2003–present[71]	A replica of the original B-3 with digitally generated tonewheel simulation
	XK-1	2005–2011	Cut down version of XK-3, but extended vib/cho settings later in XK-3C
	XM-2 / XM-c2	2005–present	MIDI module version of the XK-1
	XK-3	2004–2007	Same internals as a New B-3 with cheaper keyboard base and built in Leslie simulator. Can be expanded with optional lower manual, stand and pedalboard.[72]
	XK-3c	2007–present[73]	Updated version of the XK-3
	SK1	2011–present[74]	Stage keyboard with pianos and other instrument samples as well as organ
	SK-2	2011–present	Dual manual SK-1
	XK-1c	2013–present	Improved XK-1

References

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