Michell Gyrodec Turntable
I always thought that task of a turntable seems to be simple. At audio frequencies, the arm should be kept locked above the groove, without any motion relative to the cartridge. And the LP should be turned at a constant angular speed underneath the stylus. This means that, the pieces ie. platter, bearing, (sub)chassis, arm board, tone arm, and cartridge body should behave in a rigid and non-resonant fashion. John Michell (R.I.P) was a brilliant engineer and has various solutions...
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