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From: dsj@rabbit.UUCP (David S. Johnson @ )
Newsgroups: net.audio
Subject: A new LP defect to worry about
Message-ID: <3166@rabbit.UUCP>
Date: Tue, 18-Sep-84 23:27:59 EDT
Article-I.D.: rabbit.3166
Posted: Tue Sep 18 23:27:59 1984
Date-Received: Tue, 25-Sep-84 03:33:33 EDT
Organization: AT&T Bell Laboratories, Murray Hill
Lines: 22

My purchase of a CD player has greatly increased the amount
of time I spend listiening to records, both CD's and
(for comparisons) old LP's.  On two of the latter, I discovered
the following problem:  On tracks near the outside of
the disk, the grooves had gone so far out of round that they
set my entire cartridge into rapid back-and-forth wobbling,
forcing it to jump entirely out of the groove.  This was quite
visible (surprisingly, the Staunton 881S could survive
a certain amount of this vibration without audible distortion,
until it was actually thrown free).

These records were OK when I first bought them, so what happened?
(No, I wasn't storing them on top of the radiator,
yes I was storing them vertically amidst my other records.
One was even in a boxed set, the other members of which are still OK;
the other was in a cabinet in a different room.)

Since this was more than 10% of the old records I tried, I shudder
at what may have become of my whole collection.  This appears
to be another argument in favor of CD's.

David Johnson, AT&T Bell Laboratories