CHAPTER 10
Moving-Coil Head Amplifiers
Moving-coil cartridges are generally accepted to have a better tracking performance than moving-magnet cartridges because the moving element is a set of lightweight coils rather than a magnet, which is inevitably made of a relatively dense alloy. Because the coils must be light, they consist of relatively few turns, and the output voltage is very low, typically in the range 100 to 550 μVrms at a velocity of 5 cm/sec, compared with 5 mVrms from the average moving-magnet cartridge. Fortunately, this low output comes from a very low impedance, which, by various technical means, allows an acceptable signal-to-noise performance to be obtained.
Moving-Coil Cartridge Characteristics
There is much greater variation ...
