From: utzoo!decvax!harpo!floyd!vax135!cornell!tesla!jeff
Newsgroups: net.audio
Title: Re: more on dust-cover static
Article-I.D.: tesla.49
Posted: Thu Apr 28 17:45:16 1983
Received: Sat Apr 30 03:49:01 1983
References: vax2.526

The REAL reason for using the dust cover while playing is to keep off dust.
THe aerodynamics are such that the spinning disc creates a vortex that
attracts air [downward], allowing it to deposit on the disc surface the
dust carried in the air.  Whether enough static builds up on a dust cover
to attract a tone arm--why not?--depends on the stylus force and the
charge buildup on the dust cover.  But, shouldn`t the tone arm have been
grounded?  Why not apply an electrolyte(i.e., anti-static fluid) to
the cartridge shell, presumably plastic, to allow charge to leak off
to the tone arm?  Perhaps another solution is necessary for those fancy
boron fibre tonearms.
J.Frey