From harjoy@elknet.net Tue Apr 02 11:07:55 2002
Subject:Re: leakage?

--- In CloneWheel@y..., "fatboy145leslie" wrote:
>
> > Leakage is the sound that is caused because each of the 91 TG's
in
> a Hammond Organ are not perfectly electrically and magnetically
> isolated from each other. When one key is struck, a little of the
> surrounding tones also bleed through.
>
> Yes, and it's also noteworthy that on a real tonewheel organ
this
> condition tends to increase as the years go by.

And sometimes gets pronounced enough to drown out musicality
altogether in some spots, and detracted from the clarity and
differences of drawbar settings.

I was amazed at the sound of my 55 C3 after the preamp was rebuilt
and some tubes chamged. I thought Goff might be right about replacing
TG caps, but am glad I didn't.

I have a VK7 and while it is no perfect matching of the C3 and 2
Leslies it certainly generates an acceptable organ sound with a non-
sickening Leslie sim. I had the OS upgrade, which noticeably changed
the Sim.

Hal

It may be that it's
> the result of drifting capacitance values of the tone generator
caps
> as they age. Also, it is not a uniform condition. On my '59 C-3
the
> Bb and Eb notes leak noticably more than the others. One presumes
> that all the caps do not breakdown the same way or at the same
rate,
> particularly in older organs (pre-'64) whose caps use wax
dielectric
> which are more prone to age breakdown. Though some folks
(including
> me) feel that SOME older organs have more character to their sound
> because of aging characteristics of the TG caps.
>
> Mark Longo