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In Reply to: RE: When I see an elephant fly posted by ecl876 on October 12, 2016 at 21:47:02
OK, I'm not an engineer.
But if the magnetic field is strong enough to fully support and rotate the platter, would not it still transmit any vibrations from the base/plinth to the platter and record, just the same as a traditional design?
Then if so, what would be the advantage?
"The piano ain't got no wrong notes." Thelonious Monk
Follow Ups:
No, in the same way your suspension springs are strong enough to hold up the car, but don't transmit all tire vibrations. They act like a frequency filter. If you lift the car spring up and down slowly, it doesn't compress (after the initial load compression) and the car will follow the spring. If you do it quickly, the spring compresses and expands and the car may remain relatively motionless.
Edits: 10/13/16
the suspension on a car is compliant. The suspended platter should not be compliant to vertical moves or it would be like playing a warped record from the perspective of the cartridge.
The objective for the car suspension is to absorb and smooth the bumps not be rigid to their transmission. I have a difficult time visualizing how the suspended platter can absorb vibrations while holding the platter absolutely in a fixed plane.
"The piano ain't got no wrong notes." Thelonious Monk
A magnetic field capable of fully transmitting, say 5KHz, to something with the mass of a turntable platter several inches away would require an impractical amount of power. My guess is that the platter may levitate and spin, but not with the control of a spindle and bearing.Think of a speaker. If it's small and light then the voice coil can make it vibrate at 20KHz. It's it's big and heavy, the energy never makes it to the cone.
Edits: 10/13/16
What about the magnetic field affecting the cartridge magnet? That's my first thought, along with "how does it maintain proper speed"?PS: have now read the whole thread, I see you posted the same question about the field affecting the cart. Not just me then :)
Edits: 10/13/16
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