1013Chapter 27
Analog Disk Playback
by George Alexandrovich and Glen Ballou
27.1 Introduction........................................................................... 1015
27.2 Disc/Record Dimensions................................................................. 1015
27.2.1 Record Diameter.................................................................... 1015
27.2.2 Maximum Outer Diameter............................................................ 1015
27.2.3 Groove Dimensions.................................................................. 1015
27.2.4 Stereophonic Groove................................................................. 1015
27.2.5 Channel Orientation................................................................. 1016
27.2.6 Channel Phasing.................................................................... 1016
27.2.7 Channel Levels..................................................................... 1016
27.2.8 Speed of Rotation................................................................... 1016
27.2.9 Lead-In Groove Pitch................................................................ 1016
27.2.10 Lead-Out Groove................................................................... 1016
27.2.11 Finishing Groove................................................................... 1016
27.3 Signal Equalization in Disc Recording...................................................... 1016
27.4 Turntables............................................................................ 1018
27.4.1 Drive Systems...................................................................... 1018
27.4.2 Turntable Design in the 21st Century.................................................... 1021
27.5 Tonearms............................................................................. 1021
27.6 Phono Pickup/Transducers and Styli........................................................ 1026
27.6.1 Cartridge Styli...................................................................... 1031
27.6.2 Cartridge Voltage Output............................................................. 1033
27.6.3 Electrical Loading................................................................... 1033
27.7 Phono Preamplifiers................................................................... 1033
27.8 Laser Turntable System.................................................................. 1034
27.9 Record Care Suggestions................................................................ 1036
27.9.1 Brushes........................................................................... 1036
27.9.2 Record-Cleaning Machines............................................................ 1036
27.9.3 Record Storage..................................................................... 1037
27.9.4 Cleaning Records................................................................... 1037