Nude Turntable Project

Very informative. Thanks again.

Banquo363, you beat me to it. BTW thanks for the report of trying your table without the tin can.

Halcro,

09-12-13: Halcro
And here is the equally famous Takai Lab Final VTT-1 belt-drive turntable similar to Dover's.....although he has the Parthenon model I seem to recall which is quite different to this one?

The Final in the picture is missing most of the TT. It is a VTT1 Platter & bearing with non standard Lead Console plinth, and a Pioneer DC motor drive. It is missing the original SPZ plinth and it is also missing the original sine & cosine wave regenerated power supply and original motor.
Here's an early Final VTT1 with the SPZ plinth.
http://www.hifido.co.jp/KWfinal/G0301/E/0-10/C09-43580-46106-00/
In my VTT1 the wine/cosine generator is separate from the motor and uses a separate power amplifier for providing motor drive.
The Takai/Final Labs preceded both the Melcos and the big micro's by 7-8 years. The Melco's are interesting - they use embedded titanium in the bearing assembly, and the thrust pad is mounted on a spring designed specifically to the platter mass. The platter uses the Okubo mass formula to obtain equilibrium and minimise bearing "friction".
The Takai/Final Labs have an inverted bearing, placing the platter centre of gravity well below the bearing point, whereas the Melcos/Micro use the conventional bearing. The Takai/Final Labs also use sine/cosine wave generated power supplies for the AC motors. The Melco's & Micro's are less sophisticated in this area.

Is no one interested in the magnetic fields concentrated at the normal arc of the cartridge? It would be helpful and interesting if someone with a smartphone would install the Tesla app and repeat my experiment.

Is this a problem? Does it effect all DD turntables?

I have ordered mu-metal sheets to try and redirect the magnetism away from this area. More on that in a week or so.

Gary

according to this, it is a problem, Aigenga. I believe Lewm investigated these issues with his Kenwood.

Sorry I don't have a smart phone but next time friends come over I'll have them do it.

The symptoms of rfi and emi contamination that site articulates are certainly troubling. I don't detect them in my set up, but I suppose along each of the dimensions things could be better--so who knows. As I noted above, I stuck some pieces of TI Shield underneath my subplatter right above the motor cover. Perhaps that is doing me some good? And if I used a heavy platter mat I would use the shield directly beneath it--but the boston audio mat 2 wasn't heavy enough to flatten the piece I cut. I think the mu metal is thinner.