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Re: OK, all you hi-RPM propellerheads...........

His figure 2-2 in his paper is the one he gets all his data and
derives his calculations from. It is not in the book referenced
in his paper:

Olsen, Harry F. “Music, Physics and Engineering”
Dover Publications, Inc. N.Y., 2nd ed. : 1967

When I contacted Dan, he never could find the actual reference.
I asked on this newsgroup about two months ago if anyone had seen the
book it came from.

Not that it isn't an interesting paper. It just that the references cited don't check out.

Somebody here pointed me to an article by Hiraga that was reprinted
in the March 2002 issue of AudioXpress. This is very similiar.

The main problem with this work is that the simple equations like
this ignores different frequencies. Cheever's equations were derived for a frequency of 1Khz. The equation would look different for 100Hz.

It would be tough to get an amp to dynamically do a frequency analysis and produce the proper distortion spectrum. Nonetheless,
it might be a good first order approximation - especially for
tubes.

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