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In the Forum: Analog Playback
In the Thread: Tritium Turntables

Post Subject: If does not say "Air Bearing".Posted by Romy the Cat on: 11/8/2011

I mean the way how they call their turntable is absolutely irrelevant, they can call it antigravity bearing but it does not mean anything. They do state that the turntable has air-suspended tonearm; which is fine and common for liner arms. They however did not explicitly state that the platter is air-suspended. I could not believe that people would make air-suspended platter and do not explicitly say about it. They say that “Platter assembly has suspended on a Brass/Bronze ball bearing and nylon thrust pad for smooth operation”. So, it does have the ball bearing but it is absolutely not know if that ball bearing used for juts holding the platter of it cares the whole platter mass during the rotation. All air- bearing turntable have some kind of conventional bearing in there but this bearing is irrelevant as when air come in the air-pressure lift the platter up and the bearing become disengaged. So, it is very much not know if air in this TT used under platter, I would presume that it is not as they stress the “nylon thrust pad for smooth operation”. If the bearing is used only during the non-spinning then they would not care about the “smooth operation” of their platter. Also, suspect that the platter is not so heavy, curved inside and most likely 20-30 pounds. With higher mass the allegedly used ball bearing will because a liability. Also, it is common that if people have high mass then they specify the weight of at least the moment of inertia of platter. If a company, like “American Sound” states that the platter is 85 pounds then it is it, all bets are off and everyone know what it means. I do not believe that company would invested efforts into making the platter heavy and failed to mention about it.

The Cat

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