Harry-

This arm looks very interesting, I curious about how it will sound.

I was wondering if you could expand a little on your rationale for going with a straight tone arm, especially at this length? I understand that you wanted to eliminate skating force, but not sure if you can accomplish that given the current set of parameters.

There are a number of on-line calculators for tone-arm geometry (and the formulas are readily available as well). Plugging in 355.6mm for effective length, 370.5mm S2P distance and assuming 63mm for inner radius and 146mm for outer radius, there will be only one null point where there is zero tracking error (104mm center radius) and therefore no skating force and minimum distortion. However, at the inner radius, the tracking error will be -8.8 deg which will create about half of the skating force that a properly offset arm would have, but the distortion will be about 8% or 10x more than the worse case with an offset arm of the same length.

At the beginning of the record, the tracking error will be +5.7 deg which will cause the stylus to skate

away from the spindle and distortion will be more than 4%.

Plugging in the optimum numbers for a 14" arm (17 deg offset angle and 14.1mm overhang), the worst case tracking error is 1.36% and the worst case distortion is 0.8%, with minimum distortion at the beginning and end of the record.

Soooo....what am I missing here?