[HAM] Leslie Rotor Direction

[David Anderson]

Jim,

The motor directions are what I'd expect.

On the old single-speed cabinets, the rotors turned in the same  
direction. When they went to the two-speed motors, they flipped the  
lower motor upside down, changing its direction. This was one of the  
quasi-accidental changes of going from single-speed to two speed  
cabinets, the other main issue being that there was an unintentional  
reversal of amplifier phase as a result of moving the plugs around.  
So, if you're running a two-speed cabinet and a single speed in  
tandem, you have to check the phase of the woofers. Depending on how  
they're located relative to each other, it can be an issue.

David

P.S. The story about the amplifier phase reversal comes from a  
conversation with Harvey Olsen. Don Leslie admitted to him that it  
was an inadvertent result of changing the wiring layout of the front  
end of the amp.

On May 22, 2008, at 8:04 PM, Jim Shanks wrote:

> Now I have to go into the whole story.  I bought this thing a month or
> so ago.  It's a converted Leslie 251 with a 122 Amp, a Speakeasy  
> Vintage
> Music lower (single speed) motor, a stock single speed upper motor  
> and a
> Caribbean  Controls  speed  control.  All I can think is either  
> someone
> hooded the 251 up to a 122 cable and smoked everything (possible) or
> they just got tired of fixing the slow motors so they replaced it all
> with single speeds and the solid state speed controller.  Anyway, the
> speed controller works fine.
>
> I think the problem is that the bass rotor is supposed to be  
> clockwise .
> . . so is there any way to "reverse" the direction of the Speakeasy
> motor?  Maybe I can ask them that if no one here knows.
>