[HAM] leslie 145 questions

[William Mark Bristow]

Andrew,
1.) The motors are induction motors and the positioning of field poles to
rotor in the motors determines the direction of rotation.
2.) In all 145,147 - 142,122 the top rotor usually turns counter-clockwise
and the bass rotor turns clockwise.  Hammond did make a few (after they
acquired Leslie) with the new "tach" controlled motors with did rotate both
rotors treble & bass clockwise - this was quickly corrected.  If someone has
one of these - it can be fixed by putting a call into Hammond and a tech can
talk you thru the necessary steps to fix.
3.) The tube amps all produce a great deal of heat and absolutely must not
be covered - in fact it's not a bad idea to leave the rotors on fast (the
lower rotor acts as a fan to cool the amp) if the units are going to be on
for hours and hours - unused - such as during long church services at times
when there is no music - or band rehersals waiting long periods without
playing, etc.  I've played for years using both tube - and now solid-state
amps in dusty outdoor settings - and churches where the Leslies are hardly
touched -- very dusty both conditions.  After outdoor things - we take an
airhose - open the units up and blow the dust out of everything.
Mark

-----Original Message-----
From: hammond-bounces at zeni.net [mailto:hammond-bounces at zeni.net]On
Behalf Of andrew h.
Sent: Saturday, November 01, 2003 6:54 PM
To: hammond at zeni.net
Subject: [HAM] leslie 145 questions


Please bear with me, I've got a few questions in regards to leslie 145:

1.)   What determines which way the treble horn rotates?
2.)   Let's pretend I purchased a 145 new from Leslie......Which way
       would the treble horn and bass rotor rotate?

3.)   Has anyone ever fitted the 147 amp with a bottom cover to prevent
       the insides of the amp from getting "gunky/dirty"  ?


Thanks in advance
Andrew

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