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9.3 - What are "Hill and Dale" recordings, and how do I play them back? |
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This article is from the Audio Professional FAQ, by with numerous contributions by Gabe M. Wiener others.
Hill & Dale recordings are discs where the grooves move vertically
instead of horizontally. Edison, for instance, cut his discs this
way. In order to play Edison discs, one needs a special glass ball
stylus that is 3.7-4.0 mil wide. This is available from Audio 78,
among other places.
Also, since the information is vertical instead of horizontal, one
must rewire a stereo phono cartridge to reject the normal horizontal
information and reproduce only the normally-discarded vertical
information. This is easily accomplished by wiring a stereo cartridge
in mono, summing the channels, with one channel out of phase. In
other words, connect the cartridge as follows:
______________ | ____ to preamp + L - + R - | | | | | | |_________| | |__________________
 
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