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[ARSCLIST] Eccentricity of LP's / spindle hole or OD?
I'm one of those audiophiles, 67 years of age, that wonders about
the effect of the accuracy of the center hole. Some of the LPs I put
on the TT have play due to a center hole that's punched out of
round, too large or what ever.
I'm playing a record on a Denon 308 direct drive table using a
system devised by a LJT Mfg in Canada to reduce eccentricity and
help flatten warped records using a peripheral ring clamp in
conjunction with a 1420 gram spindle clamp. The trio comes along
with a cnc machined polycarbonate centering disc that straddles the
record after the clamp ring is set registering on the outside
diameter of the record. I can feel play regarding the center hole as
I implement the OD centering device. I'll measure it tomorrow,
just a few thousandths. The music sounds fine to my ears but I wonder
what the relationship is to the record grooves, the outside diameter,
and the center hole.
A while back a TT was made that had an extra arm that MEASURED
THE ECCENTRICITY of the record and re centered the disc for play,
it sells for big bucks if you can find one.
FINALLY, Your thoughts on the question?
regards, Ken Fritz