For example ,a sine wave at 3.2 mV RMS multiplied by 2.828 equals 9.05 mVpp and a complex waveform bass pedal note at 14.89 mV RMS multiplied by 4.7 equals 69.83 mVppĪccording to most of the measured TG output curves that l have, Alan Young's quoted 9.05 mVpp seems weaker than the more common 10 to 11 mVpp for the TG note 36 and 22.62 mVpp for the TG note 91 seems too strong compared to the more common 15 to 20 mVpp levels of the measured TG’s in my TG spreadsheet. To convert the complex waveform mV RMS level of the bass pedal TG notes 1 to 12 into mVpp, you multiply the mV RMS level by 4.7. To convert sine wave frequencies in mV RMS into mVpp, you multiply the mV RMS level by 2.828 to get the mVpp level. This contour has been modified only once, in 1956, for the convenience of our test equipment procedure."Ģ50 Hz is between the TG notes 36 and 37.ģ.2 mV RMS is 9.05 millivolts peak to peak ( mVpp ) and 8 mV RMS is 22.62 mVpp. The upper portion and lower portion rise at about 2 db per octave from the mean low level at aboutĢ50 Hz. The output voltage of each tone source (tone wheel coils) follows a prescribed "pre-emphasis" schedule varying from 3.2 to 8 mV. Report by Alan C Young, Senior Product Analysis Engineer: Mike Fulk posted this to Hamtech in 1998 and it says the following: However there is an Alan Young factory report from 1969 which has some information. I have never seen any Hammond factory chart that shows the official correct factory TG output levels measured directly from the TG terminal strip in millivolts Peak to Peak ( mVpp ) or in millivolts RMS ( mV RMS ).
#Hammond organ serial numbers model k generator#
THEORETICALLY POSSIBLE HAMMOND FACTORY TONEWHEEL GENERATOR OUTPUT LEVELS FOR THE HAMMOND ORGANS OF THE VARIOUS ERAS OF PRODUCTION.
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