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Hammond Accessories and Add-ons
by Trek II Products*, Benton Electronics* and More
 String Bass
Leslie Two Speed Controller
Percussion
Smooth Drawbars
Line Out Box
Tremolo Switches
Rebuilt B3 Tube Preamp
Solid State Preamp
Leslie Brake Function
Reverb
Transposer
Combo Preamp
Trek II Percussion Unit
Leslie Two Speed Motor Controller Conversion Using MTC Logic
Smooth Drawbars Conversion for Older Hammonds with Ratchet Style Drawbars
Line Out Box for Vintage Hammond Organs
Trek II SSP-3 Solid State Pre-amp
Rebuilt B3/C3/A100/D152/RT3 Tube Preamp
By Benton Electronics - Converts older single speed Leslie’s to 2-speed using original motors. It Replaces both the old mechanical relay and provides fast and slow speed operation. Optionally adds brake function. Uses state-of-the-art Industry Standard Motor Drive Technology, thus avoiding problems such as low torque, motor heat and growling noise with slow speed. Can even work on 2-speed models eliminating the slow motors and the tedious adjustments and wear. Single Speed Leslies include models 21H, 22, 22H, 22R, 31H, 44W, 45, 46, 47, 51.
Leslie Brake Function
The MTC Logic Motor Controller, when combined with a 3 position tremolo switch, will provide FAST, SLOW and OFF to any Leslie in the 122 and 147 families.
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This unit adds the famous Hammond B3 style percussion sound to pre-B3 Hammond consoles. It mounts in place of the upper left hand check block. The TP-2B not only provides for the B3 style percussion, but gives you an additional percussive voice and more control.
Features
•Three harmonics - 2nd, 3rd and 5th
•Level controls for each harmonic
•Adjustable decay rate
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For Hammond models A, AB, AV, B, BA, BC, BCV, BV, C, CV, D, DV, RT, B2, C2 and RT2 that have the ratchet style drawbars. No more ratcheting and no more tone drop-outs in between drawbar settings. Your drawbars will be as smooth as those found on later Hammond models B3, C3 and A100, although some of our customers have told us that their converted drawbars are actually smoother than those of a B3. It comes With installation and a one year warranty. (exchange required)
This kit provides a ¼” Bass Output and a ¼” Full Range Output with volume control to any spinet or console Hammond organ, making your organ ready for any combo amp or mixing board. It also provides a great way to boost your bass.
Aging resistors,tubes and capacitors can become noisy and unreliable. The SSP-3 is a solid state replacement for most standard Hammond tone wheel consoles. The SSP-3 has been carefully designed to faithfully reproduce the response of the original tube pre-amp when it was new.
Features
Options
•Built in reverb
•Built in power supply
•Built in Leslie 122 tremolo control circuitry
•Built in B3 style percussion
•Percussion control head - enables percussion voices for pre-B3 consoles"
•Auxiliary amplifier channels provides amplifier input for keyboards, rhythm units, etc.
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B3s were made from 1955 to 1975 and the components within the preamp are old and aging. As components within the preamp age,they drift in value and sometimes breakdown causing intermittent statics, hums, poor bass or treble response, etc. Replace your aging tube preamp with a rebuilt tube preamp, all resistors, capacitors, potentiometers and tubes have been replaced, also an improved power supply for a cleaner sound has been added, and the chassis is treated to prevent the growth of zinc dendrites. The warmth of a tube preamp is retained and the original (now disconnected) capacitors are left in place for asthetics. It comes with installation and a one year warranty. Exchange required.
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Trek II Reverberation Unit
Trek II Echo / Tremolo Switches
Trek II TR-3 Transposer
Trek II UC-1A Combo Pre-amp
Trek II SB-2500A String Bass Unit
For use in most standard Hammond consoles. Uses a full size three spring delay line for a natural reverb sound. Designed specifically to interface with vacuum tube circuitry of Hammond tone wheel consoles.
Features
•Includes reverb level control
•Designed for Hammond tone wheel consoles
•Full size three spring delay
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Half Moon Tremolo Switches / Main - Echo Switches
Just like the originals, inside and out. These switches will give you the vintage look and feel your are looking for.
Mounts in place of the lower left hand end block on standard Hammond tone wheel consoles. Allows convenient rocker switch control of the tremolo function. Two electrically isolated switch sections allow the control of dissimilar Leslies with a single switch. Pre-punched mounting hole provided for addition of a reverb or other control in the same enclosure.
Notes
When ordered along with Trek II Reverb or SSP-3 Solid State Preamp, the Tremolo switche can be supplied with the reverb control pre-installed in the end block cover.
More Info from Trek II - Single Tremolo Switch
Works with most Hammond organs utilizing a top octave generator IC (MDD). Will allow the organ pitch to be shifted in discrete semitone steps as much as two semitones sharp or four semitones flat.
Features
Note
•Shift your playing into a singer's vocal range
•Modulate from key to key
•Accompany other instruments playing in "difficult" keys
The TR-3 Transposer is not compatible with tone wheel type organs.
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Allows most single channel Leslie speakers to be driven by your portable organ, guitar, synthesizer or mixer. It provides two 1/4" phone jack inputs, one for high level signals, one for low level signals.
Features
•Foot switch tremolo control
•Foot switch power on/off
•Power and tremolo indicators
•Input level and tone controls
•Four different outlets to accommadate each of the following Leslie families listed below.
More Info From Trek II
Group 1
Group 2
Group 3
Group 4
11 Pin
9 Pin
6 Pin
6 Pin
122XB
130
315
330
412
415
422
615
705*
715
716
720*
722
723
730*
740
750
771
812
814
815
820
822
840
860
912
914
2101
700*
710*
760
770
825
900
910
925
21H
22H
22R
31H*
122
122A
122R
122RV
122V
142
222
222RV
242
25*
44W
45*
46W
47
125*
145
147
147A
147RV
225*
245
247
247RV
*NOTES: The UC-1A will also function with 700, 705, 710, 720 and 730 type cabinets when the LCO-1 or LCO-1A crossover is installed in tone cabinet. Model 31H is compatible only if above serial # 5200. Models 25, 45, 125, and 225 are compatible only if equipped with amplifier.
Provides 25 notes of deep rich bass with sustain and pluck effect. Installs in standard consoles utilizing the existing pedal switch contacts. Separate 8' and 16' outputs function with the existing pedal drawbars. Although designed to be played from the existing pedals, it will work with any single make contact assembly or keyboard.
Features
Note
•Adjustable sustain length
•Adjustable pluck effect
•Quartz tuning accuracy
•Separate outputs for connection to external amplifier
The SB-2500A is also available in a version for use as a replacement bass pedal generator in organs with unreliable, unrepairable, or poor sounding pedal sections (E100,R100,etc.)..
*Trek II is a registered trademark of Trek II Products, Inc.
Copyrighted images by Trek II Products, Inc., used with permission
 String Bass
Leslie Two Speed Controller
Percussion
Smooth Drawbars
Line Out Box
Tremolo Switches
Rebuilt B3 Tube Preamp
Solid State Preamp
Leslie Brake Function
Reverb
Transposer
Combo Preamp
*Benton Electronics is a registered trademark of Benton Electronics
Copyrighted images by Benton Electronics, used with permission

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