November 2007
Intermediate to advanced
736 pages
46h 32m
English
Content preview from Consumer Electronics
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CRYSTAL PICKUP HEADS
In a crystal pick-up head a strain is produced in the piezoelectric crystal by the vibration of the stylus as it follows the modulation of the recorded groove. The amplitude of this modulation governs the output voltage of the head.
Fig. 9.9 Construction of stereo pickup cartridges (a) moving-magnet type (b) moving-coil type
The rated output voltage of a crystal pickup is always quoted at a particular frequency. This is required for comparison of a recording made to a constant velocity and the amplitude of modulation. Hence, the output voltage—of such a recording is inversely proportional to the frequency.
A typical ...
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