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Tables That Feature Bearing Friction

I recently had the opportunity to audition the DPS turntable which, unlike most tables, has a certain amount of friction designed into the bearing. This, when paired with a high quality/high torque motor, is said to allow for greater speed stability--sort of like shifting to a lower gear when driving down a steep hill and allowing the engine to provide some breaking effect and thus greater vehicular stability. I am intrigued by this idea and was wondering what other people thought about this design approach. Are there other tables which use this bearing principal? One concern I have is that by introducing friction you may also be introducing noise. Comments?
dodgealum
jloveys
226 posts
 
Have you seen/heard the new Platine Verdier Magnum with 135 pounds 50 cm diamater massive platter levitated by hydraulic oil suspension inverted bearing ?
A work of art to say the least !
dgarretson
2,628 posts
 
Dertonarm, before you go, what specific test/thickness of aramid or dyneema do you recommend, and what type of knot do you use? I have something like the no-force platter bearing & thread drive sytem you describe(though achieved by means other than dual motors) and would like to try your threads.
dan_ed
2,451 posts
 
Dertonarm,

The complex system I have been referring to IS the turntable. I don't believe you are really this thick-headed. I believe you are just looking for a flame war. Try AudioAsylum, they love that stuff over there.

dertonarm
1,042 posts
 
Well Dan_Ed, you might see it as a complex system. It is to some extend - as I have mentioned before. But not all that bad.
Flame war ? No, I am after results - not opinions.
But it seems very hard to get the message out.
teres
120 posts
 
###
- possible highest platter weight
- possible to use high inertia for self-stabilized speed
At least the last two reasons can not be used with idler or dd drives. ###

Wow you are dead wrong about this. The Rockport Sirius is direct drive and uses a 62 lbs. platter. The Certus DD turntable uses a 60 - 75 lbs platter. The Verus rim drive motor has been used (with excellent results) with platters up to 70 lbs. There is no reason practical or otherwise that limits direct or idler motors to light weight platters. The Certus motor is more than capable of driving a platter well in excess of 100 lbs.

BTW: we have done direct comparisons using the exact same 75 lbs. platter with belt and direct and rim drive. They all sounded considerably different and the belt drive was the clear loser.

Your heavy platter, slipping string design is one of many possible approaches to turntable design. But

- it is not the only correct way
- it is not the only concept that "agrees with physics"
- it is not an idea that cannot be improved on
- it is not without compromise
- in my experience the slipping string part of the design
is inferior
- the heavy platter part I agree with, but others can make
credible arguments for a light and responsive platter.

I have have no problem with disagreement. In fact it can be a lot of fun and enlightening. But the constant demeaning of dissenting opinions has gotten old. I am done...
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