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RE: How Important is Stylus Shape?

Interesting! I see your point!

However, it doesn't matter whether it's a straight arm or a J or S shaped arm as long as it's an offset tonearm. Then, rather than using the effective length directly in the calculation you would use the cosine of the offset angle times the effective length. For example, the true change in SRA would be determined by the following equation:

1) Delta_SRA = Asin{Delta_Thickness / [cos(offset) x effective_length]}

The above method would yield a change in SRA that is slightly greater than the following method:

2) Delta_SRA = Asin(Delta_Thickness / effective_length)

The change in SRA would be about 0.013-degrees greater using the first equation versus the second equation with the numbers given in miner42's post.

That is an excellent deduction. I hadn't thought of it before.

Best regards,
John Elison

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