Harmonic drawbars, Drawbars (a-100, b-3, c-3, mellow), Middle “c – Hammond SK Pro-73 73-Key Portable Keyboard/Organ User Manual
Page 38: 1 sk pro/sk pro-73 owner’s manual, Example of “clarinet, Drawbar registration
51/3'
16'
8'
4'
22/3'2'
13/5'11/3'1'
51/3'
16'
8'
4'
22/3'2'
13/5'11/3'1'
51/3'
16'
8'
4'
22/3'2'
13/5'11/3'1'
51/3'
16'
8'
4'
22/3'2'
1 3/5'11/3'1'
*#1
SK PRO/SK PRO-73 Owner’s Manual
38
51/3'
16'
Sub
Fund.
Sub
3rd
Funda-
mental
2nd
3rd
4th
Footage:
Harmonic:
8'
4'
22/3'2'
Middle “C”
Th
e Harmonic Drawbars are the heart of the renowned Hammond Sound and have been used
since the fi rst Hammond Organ Model A was introduced in 1935. Th
ere are approximately
253,000,000 possible sound combinations that can be produced by these Drawbars. The
illustration below shows how each Drawbar relates to the keyboard when middle “C” is pressed.
NOTE: When recalling Combinations or ORGAN Patches, the positions of the Drawbars will change
internally, but not physically. When a Drawbar is moved, the Patch setting will update to that
Drawbar’s current position. You can also match the entire Drawbar registration to the physical
Drawbar setting. See page 45 for more information.
HARMONIC DRAWBARS™
DRAWBARS (A-100, B-3, C-3, Mellow)
51/3'
16'
8'
4'
22/3'
2'
13/5'1
Each Drawbar may be set in eight diff erent positions in addition to the silent or
“0” position. Each position, as marked on the Drawbars, represents a diff erent
degree of intensity of the harmonic it controls. When drawn out to position “1,”
the harmonic it represents will be present with minimum intensity, when drawn
out to position 2 with greater intensity, and so on up to position “8.”
If you pull the fundamental (8´), the third harmonic (2⅔
´) plus the fifth
harmonic (13/5´) Drawbars out completely and play the keyboard you will notice
the sound resembles a clarinet.
If you push the 8´ Drawbar half-way, you’ll notice the sound becomes more high-
pitched and a bit “harder.” Now pull the 8´ Drawbar back out fully and push the
2⅔
´ and 13/5´ in halfway. Notice how the sound becomes mellower.
Experiment with the Drawbars to obtain your own favorite registrations.
For “Tone Wheel” Organs, the relationship between each
Drawbar and its footage is shown on the “TW” legends directly
in front of the Drawbars.
DRAWBAR REGISTRATION
Below is an example of using Drawbars to create
diff erent sounds.
Example of “Clarinet”
5
1
/
3
'
16'
Sub
Fund.
Sub
3rd
Funda-
mental
2nd
3rd
4th
5th
6th
8th
Footage:
Harmonic:
8'
4'
2
2
/
3
'
2'
1
3
/
5
'
1
1
/
3
'
1'
Middle “C”
5
1
/
3
'
16'
8'
4'
2
2
/
3
'
2'
1
3
/
5
'
1
1
/
3
'
1'