"pin set", test blows, string segment tension balance: Reality Check?

[kurt baxter]

>
> Another fun experiment is to see how small an increment you can use to
> turn the pin. Then see how many it takes to turn the pin 1/4 turn. When you
> get up to around 225 barely perceptable movements, you'll be right up there
> with some of the finest technicians in the business. If you're somewhere
> around 175, then you'll be like the majority of us. :-)


Ok, this is a great idea, and exactly the sort of thing I am talking about-
I will try this in the shop tomorrow.
Now, that idea leads to this question: In a frictionless world with no other
factors, how much of a PITCH CHANGE
would 175th of a 1/4 turn translate to? At say, A440? What is the formula
for figuring that?


[kurt]
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