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Why the frowny face? Salas has plenty of happy campers. Vinyl is such a mess does it really matter.?
I should have said: One of my latest phono preamps has IC's through-out. Another has both discretes and IC's.
It is a nice set of designs, and reasonably easy to build. But a schematic even with a pc layout is not a complete set of instructions. That will result in a wide variation of build qualities. However it will sound wonderful to the builder. So it really is not useful to compare it to a fully complete unit. However your post will have it's intended effect to energize John.
I have stayed out of the speaker history debate as so much of the technical details from every contributor are just wrong.
I did ask yesterday what the most common speed of a 60hz AC induction motor is? I found it interesting no one ventured an answer.
John, why don't you answer it for them?
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Thanks, but that is not the actual speed the motor runs at. That is the theoretical speed.
Sy, That is part of the question, so a good start.
I think there's a factor of 3 slippage.
edit: From the days of my youth http://www.reliance.com/pdf/motors/whitepapers/B7100.pdf
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