Re: Reverb in a Leslie

[GOFFProf@aol.com]

Dave McClellan wrote: 

>I'd like to convert my Leslie 251 into a 147RV if possible.  I
>have the 147 Reverb amp schematic.  Building the solid state
>preamp seems straighforward enough.  But where is the reverb
>spring assembly mounted on a 147RV (I'd guess well away from
>the bass driver).
>
>The 251 already has a separate reverb amp and speakers.
>Thanks>

Most Leslies with reverb (147RV, 122RV, etc.) had 6X9 speakers in them for
the separate reverb channel.  A separate tube / solid-state hybrid amp was
installed on the upper shelf for the second (reverb) channel.  These were
fine when new, but it is simply not worth the trouble to fool with as there
are better reverb units from TREK II and other suppliers.  The difference is
that the reverb signal now is mixed in with the organ signal in the organ,
therefore the reverb gets rotated by the horn and rotor.  Most platers like
this effect when using chorale (slow) and percussion, as some dramatic
effectrs are possible.

The reverb tank in the newer units is in the organ, as is the control and
wiring.  The Leslie requires nothing new at all.  The reverb tanks are
three-spring high gain units, instead of the early two-spring units. Some of
our organs can deliver a 5-7 second reverb time with the volume at almost
full!  

This is the easiest, most cost effective way to go.

Al