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hagtech wrote:

I'm not convinced a constant side load on bearing is good.  It causes assymetrical wear.  Just seems to me a center balanced bearing with no lateral loads would be better.  Merely an intuitive hunch.

Yep, the center balanced bearing is certainly better but dues it exists in a real word. I would say it never exists. The assymetrical wear is night not be good but… it is where the bias of a platter with a belt of constant torque makes the wearing irrelevant.  If cause they are all hypothetic theories and how it all works in a real word I have no idea.

hagtech wrote:

As for the copper, yes, it will ring all by itself.  But reaction is much different when sandwiched or clad.  I think what the designer is trying to do is an impedance match or translation.  We go from soft vinyl to a hard and damped sink.  Putting the vinyl directly onto the mechanical sink is not right.  The idea is to convert from one impedance to another in a broadband manner.  Same as with a horn!  That is what rubber or felt mats do on most tables.  The copper on the Raven replaces the mat.

I agree that it is not advisable to use copper without a mat. When I was in Japans I had a dinner with Micro-Seiki designer and I ask him why some of the identical Micro TT have copper or steel platters. He explained to me that copper platter by nature have idiosyncratic colorations that he felt was it a offset for SS electronics of 70s and 80s. I used Micro a few 1500, 3000, few 5000 and 8000. The 1500 had steel and I was able even to lay the record on the platter. Other 1500 with copper platter were too colored. I never was able to play the 5000 and 8000 with any heavy platters, in fact the 5000 need a special platter.

So, I think that TW’s copper top is not a big deal. The most important is how the TW’s people made and tuned the middle insert of the platter – here is where all hart of this TT lives in my view. If they “voiced” it interestingly then it shell be an interesting turntable. How much elections they stuffed in PS and how many motors they made their customers to buy is irrelevant and serve only the objectives of Framer-level BS literature.

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