For the do-it-yourselfer, here's the pinout of the R/S interface, with useful comments about connecting to it. Please note that unlike the earlier Model 122 interface, the R/S interface is NOT a direct Leslie connection. The R/S interface was the result of feedback from V3 users that had other Leslie models, and Voce had intended to create a series of adapters to link the R/S jack to various Leslies: 122/142, 147/145, 9-pin, 11-pin, etc. (This effort never happened.)
NOTE: The voltages in a Leslie are very high -- much greater than the majority of voltages in the V3. If you are unclear about any of the terms mentioned below, or are anxious about making the necessary circuits and connection, take the work to a qualified technician or repair center. Incorrect connections can result in hazardous conditions for the user, and can damage the V3 as well.
| PIN | SIGNAL | COMMENTS |
| 1 ** | Fast/Slow | A TTL 'high' level denotes Tremolo speed. A TTL 'low' level
denotes Chorale speed. The signal can supply 5mA. |
| 2 ** | Brake | A TTL 'high' level denotes that the brake is engaged. The
signal can supply 5mA. |
| 3 | G1 | The '+' side of the G-G input to a 122-style Leslie. This is
a copy of the V3's Out1 output -- with all of the Out1's noise issues. |
| 4 | G2 | The '-' side of the G-G input to a 122-style Leslie. This is
a copy of the V3's Out2 output -- with all of the Out2's noise issues. |
| 5 ** | Common | Return path for the Fast/Slow and Brake signals. |
| 6 ** | V+ | A higher voltage signal (around 35V) to provide the higher voltages required for speed switching on a 122-style Leslie. |
| ** | CAUTION: These signals are NOT intended to connect directly to
your Leslie! Doing so exposes the user to shock hazards, and could damage the V3, possibly beyond repair. |
The following schematic is a diagram of a solid-state relay (SSR) controller which converts a two-speed (Chorale/Tremolo) Leslie into a three-speed version (Chorale/Tremolo/Off). It's also very responsive and quiet when switching. What makes this design unique is:
The design shown here assumes that the Leslie is amplified using an outboard amplifier. If the "stock" Leslie amp is used, you can get the input signal from either the Out1/Out2 jacks (the hot wire of each), or from pins 3 and 4 of the DIN-6 -- but wiring and dressing the cable gets messy.
The following schematics are methods of connecting Hammond organs to instrument-level equipment, such as guitar amps and EFX boxes.
-BW
voce is a trademark of Amels and Alonso Electronic Design.
Last updated 2/15/2001.