Leslie 760 3 speed wiring problem

[d3nn1s]

Hello everyone,
I hope anyone on here can help me with my problem.
I have a Leslie 760 and a Hammond M100. I want to use the Leslie with the Speed options of Fast, Slow and Off but my M100 only has a switch for Slow and Fast. The Leslie 760 Manual says you can have 3 speeds and on tonewheelgeneral.com it says that the 3 Position Half Moon works with all Solid State Leslies. My Question is how would i have to wire either another switch or a new 3 Positions switch up to enable me to use all 3 Speeds?

Any help is much appreciated.
Thanks in advance.
Dennis.

[andyg]

Slow/Fast switches usually mean that the organ is wired for a 6 pin Leslie, 145/147, or 122 or perhaps 251. What connector kit is in the organ or is it a non-standard 'home-brew' connection.

You'd really need a 3 position half switch to do this - wired up correctly!

[d3nn1s]

It is a home-brew connection. It's just a regular switch with 2 Positions and 3 wires connected to it. I would guess these wires are for Slow, Fast and ground from how they are wired up.

[David Anderson]

I've seen any number of 9 and 11 pin Leslies wired with two-way Slow-Fast Leslie switches, probably because that was what was the installer had at the moment.

Like andyg says, if you want Slow-Stop-Fast operation, you need a three-position switch. Stop is actually the easiest to wire because there is no connection. To get Slow, you ground one wire, and to get Fast, you ground another.

[d3nn1s]

So if a want the motor to stop both wires need to have no connection to ground or anything else?

[David Anderson]

That is correct. You can find more information here:

http://www.captain-foldback.com/Leslie_sub/pinouts.htm

Grounding 6 (white) turns on Fast motors
Grounding 7 (violet) turns on Slow motors

You could say that the default for 9 pin connections is Stop since no motors should be powered without some action being taken at the organ end. I say "should be" because we are assuming no faults are present, and switching problems due to component failures are not uncommon with the 9 and 11 pin systems.

[tpappano]

If you have the ‘half-moon’ style switch box, you can replace the two-position switch with a three-position Fender-type guitar pickup selector switch. Music stores often have them in stock.