[HAM] C3 out of tune

[Hugh]

Changing the speed of the main generator shaft will not affect the 
relative pitch relationships of the tones regardless of the various 
gear ratios. Unless the individual drive spring couplings for each 
tonewheel are slipping more than during normal operation, the pitch 
ratios will remain precisely the same, which is a unique temperament 
as Scott mentioned. It's just like an LP record when you slow it 
down; the harmonic relationships don't change, but all the 
frequencies are lowered.

Hugh

At 12:10 PM 9/4/2007, you wrote:

>Magnus,
>
>Good point. The original poster also said that the organ notes were 
>in tune with each other, and, as I believe Scott said, there's no 
>guarantee that changing the speed of the main generator shaft would 
>maintain the proper relative pitch relationships of the tones due to 
>the various gear ratios.
>
>It is beginning to seem like it's the tuner that's off, not the organ.
>
>David
>
>-----Original Message-----
> >From: Magnus Enorson <magnus at musicastrana.com>
> >Sent: Sep 4, 2007 2:20 PM
> >To: The Hammond Forum <hammond at zeni.net>
> >Subject: Re: [HAM] C3 out of tune
> >
> >David Anderson wrote:
> >> I NEVER wrote that I was able to drop the generator's pitch a
> >> half-tone. Please don't ascribe statements to me that I never made and
> >> then tell me that I'm wrong.
> >The original poster, however, wrote that his instrument was a semitone
> >flat. That's probably where this confusion stems from - it can't
> >possibly be drag that's causing that problem as such large amounts of
> >drag would throw the motor out of sync instantly.
> >
> >/Magnus