File:QuadraDisk.jpg

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Summary

Description An RCA QuadraDisc recording. The color fringes around the reflections are caused by the ultrasonic signal that carries the difference information used to separate the four channels.
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Source Own work
Author Bob DuHamel

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3 January 2008

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current05:12, 4 January 2008Thumbnail for version as of 05:12, 4 January 20081,321 × 1,269 (1.15 MB)Rsduhamel{{Information |Description=An RCA QuadraDisk recording. |Source=self-made |Date= |Author= Bob DuHamel |Permission= |other_versions= }}

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