page_title: Hammond organ
section_title: Spinet organs
hierarchical_section_title: Hammond organ / History / Tonewheel organs / Spinet organs
caption_attribution_description: Hammond &#160;T-400 series &#160;with Rhythm II
context_page_description: The Hammond organ is an electric organ invented by Laurens Hammond and John M. Hanert and first manufactured in 1935. Various models have been produced, most of which use sliding drawbars to vary sounds. Until 1975, Hammond organs generated sound by creating an electric current from rotating a metal tonewheel near an electromagnetic pickup, and then strengthening the signal with an amplifier to drive a speaker cabinet. The organ is commonly used with the Leslie speaker.
  Around two million Hammond organs have been manufactured. The organ was originally marketed by the Hammond Organ Company to churches as a lower-cost alternative to the wind-driven pipe organ, or instead of a piano. It quickly became popular with professional jazz musicians in organ trios, small groups centered on the Hammond organ. Jazz club owners found that organ trios were cheaper than hiring a big band. Jimmy Smith's use of the Hammond B-3, with its additional harmonic percussion feature, inspired a generation of organ players, and its use became more widespread in the 1960s and 1970s in rhythm and blues, rock, reggae, and progressive rock.
context_section_description: Though the instrument had been originally designed for use in a church, Hammond realized that the amateur home market was a far more lucrative business, and started manufacturing spinet organs in the late 1940s. Outside of the United States, they were manufactured in greater numbers than the consoles, and hence were more widely used. Several different types of M series instruments were produced between 1948 and 1964; they contained two 44-note manuals with one set of drawbars each, and a 12-note pedalboard. The M model was produced from 1948 to 1951, the M-2 from 1951 to 1955, and the M-3 from 1955 to 1964. The M series was replaced by the M-100 series in 1961, which used a numbering system to identify the body style and finish as used on earlier console series. It included the same manuals as the M, but increased the pedalboard size to 13 notes, stretching a full octave, and included a number of presets.
  The L-100 series entered production at the same time as the M-100. It was an economy version, with various cost-cutting changes so the organ could retail for under $1000. The vibrato was a simpler circuit than on other consoles and spinets. Two variations of the vibrato were provided, plus a chorus that mixed various vibrato signals together. The expression pedal, based on a cheaper design, was not as sophisticated as on the other organs. The L-100 was particularly popular in the UK and sold well, with several notable British musicians using it instead of a B-3 or C-3.
  The T series, produced from 1968 to 1975, was the last of the tonewheel spinet organs. Unlike all the earlier Hammond organs, which used vacuum tubes for preamplification, amplification, percussion and chorus-vibrato control, the T series used all-solid-state, transistor circuitry, though, unlike the L-100, it did include the scanner-vibrato as seen on the B-3. Other than the T-100 series models, all other T-Series models included a built-in rotating Leslie speaker and some included an analog drum machine, while the T-500 also included a built-in cassette recorder. It was one of the last tonewheel Hammonds produced.
caption: The T-402 was one of the last tonewheel organs manufactured and included a built in drum machine
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