[HAM] The recapping controversy

[John Freund]

> If the wheels or shaft were out of balance, a warble effect would heard,
> correct?

Not really.  There's two things in operation here:
Frequency - the number of teeth on the wheel, the speed of the wheel
Amplitude - the distance of the pick-up from the wheel

The warble that we hear in an under-oiled or gummy TG is a result of
inconsistent speed on that wheel, not the side to side movement.  

> When you have a gen upside down on the bench or stands, take note:
> each pair of tonewheels (ie; a complete shaft, drive gear, clutches,
> and 2 tonewheels) DEFINITELY has several thousandths of lateral
> movement.  Ie; left and right.

Which, theoretically would translate in to a change in amplitude.
Perceptible?  Probably not.  Measurable?  I don't know.  I'll leave that to
someone who understands the tolerances of the magnetic field between a
tonewheel and it's pick up to give a definitive answer on that.

Regardless, and back to the first question: A gummy wheel may drift from
side to side but that is amplitude and is a symptom of gumminess but not a
cause of the audible warble.

> > Thought:  if two tonewheels ran off center, ie; far from centered on
> > the coil pickup, wouldn't those freqs be weak?

Probably not since those tones would have been calibrated to a particular
output (assuming this "defect" existed at the time of manufacturing).  You
could look at it the other way too - if it was calibrated running off center
and eventually found it's place on center, wouldn't those freqs be too
strong?

Character.

/John



> >
> >
> >
> CENTER
> > > > to the pickups?  Yes they can.  Will they?  Unless the organ is
> > > > *really* out of level **big time**, no.  Why?
> > > >
> > > > Answer that, it's something really worthy of consideration.
> >
> >
> >
> >
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