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For those of you who think you've seen everything with regards to turntables, take a gander at this kickstarter- the levitating turntable!
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Its difficult enough to limit tilt/rotordynamics with a hard shaft and sleeve bearing.
I can't see how this has a snowballs chance of sounding good.
Just a gimmicky thing. For what it is, that's cool
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
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
All that effort to get the platter to turn with (almost) no friction, but the physical contact of the stylus dragging across the LP still results in significant friction, no?
I liked the idea of the Japanese turntable with the laser pickup better since there was no physical contact with the LP. When Michael Fremer reviewed it in Stereophile a few years back, he complained that the laser detected every speck of dust on the LP, causing noise. But couldn't the disc be coated with a material transparent to the laser, like a CD? Then the laser would be reading at a depth below the surface where the crud was.
Oh well. If it doesn't work out as a turntable they can make it larger and pitch it as an amusement park ride.
I saw one fifteen years ago at Vu's shop. French company.
Y
ET
"If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936
Not really, the Platine Verdier has magnetic lift but it still has a traditional bearing/spindle. This kickstart TT does not appear to have a spindle? Can't see how that will work?
I was referring to a platter floating in air via reverse mag. It had a belt of string. I couldn't make the image large on this thing to see much.
ET
"If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936
Yea, the Platine uses magnets to offset the tremendous weight of the platter but it actually does ride on a spindle/bearing. So much of the weight of the platter does not need to be supported by the bearing.
But this new TT does not appear to have a spindle or bearing to center the platter which is truly unique (and I think impossible).
No what I saw had no physical connection. It was totally levitating, it was about a four inch thick platter and just had a string belt for drive. I stuck my hand under the platter and through the field.
ET
"If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936
TubeDriver is correct, you are describing the Verdier TT. It's easy to miss the spindle and it appears like everything is floating without an axis. If there wasn't one the string would pull the platter and not work!
Edits: 10/13/16
hmmm.... what you are describing sounds a lot like the Platine (which was Vu's reference table in the basement for years) but it does have a spindle/bearing. It has a 4-5" thick Al platter, outboard motor with string belt. All placed on a Vibraplane support. I worked there while in grad school and despite being a boutique item made by the French, the Platine Verdier was very reliable.
That would have been really useful for getting laid in college. Much better than a lava lamp.
Happy listening,
Jim
"The passage of my life is measured out in shirts."
- Brian Eno
nt
It would certainly be a conversation piece.
If it really works, I think they will sell a lot of them at those prices, but I wonder if they can really make any money. It will be interesting to see what happens.
Best regards,
John Elison
...if they can get the stability anywhere near what a bearing achieves, especially with the thing floating several inches in the air. Also, I wonder if the cartridge will be affected by the field.
Edits: 10/13/16
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