[HAM] Leslie 122RV Hammond PR40 Leslie Preamp footswitch box

[OF]

At 12:17 AM 2/13/2007, JG wrote:
>Hello,
>      I have a Leslie 122RV that worked ok with a Leslie preamp 
> pedal.  Now when I power them up,  the rectifier tube and lower speaker 
> pulsate and the motors do not rotate.  The 6 pin cable works ok with the 
> preamp pedal and a PR40,  however the PR40 hums in all positions except 
> small room and high reverb positions.  Is this 6 pin cable compatable 
> with the 122RV and the PR40?  What can I do to fix the 122RV problem?

Johnny,
This is one of those "what's wrong with this picture?" problems. Leslie 
preamp pedals were never designed to work with 122-type Leslies. So I see 
two possibilities here: Are you sure it is a Leslie-brand pedal, or is it a 
Trek II pedal? Or, more likely, your 122RV actually contains a 147-type or 
other model amp, or the 122 amp was re-configured to allow a 147-type 
connection. Before anything else can be addressed, you need to get to the 
bottom of this aspect. If your "122" amp ever worked correctly with a 
Leslie pedal, it's not a 122 amp.

The problem with the PR40 depends on how the outlet that is feeding it from 
the organ is wired. If the organ is set up to run a 147-type amp, the PR40 
won't work. What is feeding the PR40, an organ? The pedal?