Brian Gaff wrote:

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Of course if you could get the temperature low enough you could use a
superconducting magnet and lose no power so no stray fields.
Brian


**From a similar thread on RAP:

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On Sunday, July 2, 2017 at 9:10:37 PM UTC+10, Mike Rivers wrote:


And the levitation and rotation is achieved how ?


Permanent magnets. It runs. It plays records. I saw one at CES this
year. I think it's more for amazing and amusing your friends than for
being a superior way to play records, though I expect that the isolation
from vibration is excellent. Just the thing for playing your old Bob
Dylan or Aerosmith LPs during an earthquake.

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** Mike Rivers is a credible enough guy.

So as expected, is uses powerful ( likely Neodymium ) magnets.

There has to be a second rotating table under the main one, out of sight.



..... Phil