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From: ron@brl-vgr.ARPA (Ron Natalie <ron>)
Newsgroups: net.audio
Subject: Re: Unwarping records
Message-ID: <204@brl-vgr.ARPA>
Date: Fri, 13-Apr-84 12:48:34 EST
Article-I.D.: brl-vgr.204
Posted: Fri Apr 13 12:48:34 1984
Date-Received: Sun, 15-Apr-84 00:49:20 EST
References: <186@whuxj.UUCP> <58@tilt.UUCP>
Organization: Ballistics Research Lab
Lines: 14

My favorite method from my FM radio days is common through out the industry.
Most of the broadcast quality turntables use massive platters for both
durability and stability.  The method involves a weight the size of the
record label with a hole in it that is placed on the record while playing.
Other methods include a similar "spider" device that uses spring tension
rather than sheer weight.  A few years ago, someone came out with a turntable
with a vacuum pump that sucked air through the platter and could apply some
phenomental amount of suction to hold the record flat to the platter.  I
don't think it ever caught on.

I think I'll stick with the record weight and a tone arm that is sufficiently
low in inertia to track the remaing wrinkles.

-Ron