Re: [ARSCLIST] Spoke Pattern

[Steven Smolian <smolians@xxxxxxxxx>]

Many books on cutting lacquers show identify various cutter misalignment
problems by picturing the spoke or other patterns imposed on the cut in
addition to the usual groove modualtions.  When plated, it stands to reason
that they will be reproduced on the pressings.

I can't recall now which, but there is some company's 78s, postwar, I think,
where collectors identify the lathe operator by name because he never
corrected his particular misalignment.

Steve Smolian

----- Original Message -----
From: "Kurt Nauck" <nauck@xxxxxxxxx>
To: <ARSCLIST@xxxxxxxxxxxx>
Sent: Friday, June 25, 2004 9:19 PM
Subject: Re: [ARSCLIST] Spoke Pattern


>As to 78 rpm: regular spokes I have only seen on lacquer recordings,
whereas
>a similar phenomenon is not unknown even on acoustic recordings. The
surface
>then looks like moiré silk, and it is actually a constant number of
vertical
>vibrations per second not tied precisely to the rpm, so the spokes are
>"crooked". This was usually a cause for discarding a take, so they are
>uncommon.

I suppose another possibility might be a burr in a gear or some other
deficiency in the recording mechanism that would result in a frequency that
becomes visible in the recording.

Occasionally the music itself might have a rhythm or repeated phrase that
results in a radial pattern of some sort (especially in audio test
records), but this looks different from the spoking mentioned above.

Kurt & Diane Nauck

c/o Nauck's Vintage Records
22004 Sherrod Ln.
Spring, TX  77389

Website: www.78rpm.com
E-Mail: nauck@xxxxxxxxx

Phone: (281) 288-7826
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