I think Mr. Jaye meant to say "tangential tracking arms."   However, the
tangential trackers do move along the radius of the disc.  (:     Better
maybe to call the straight and S-shaped arms, pivoting.


On 12/17/11 9:12 AM, "Doug Pomeroy" <[log in to unmask]> wrote:

> It is my understanding that a radial tracking arm will
> be tangent to the grooves at two points on the disc
> surface, and that this is true of both straight and curved
> arms.  Or have we overcome the laws of physics?
> Doug Pomeroy
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