Verstärker aus eine Wurlitzer-Musikbox (Elektronik)
Ja, die Cobra Pick-Ups waren was besonderes.
The Zenith "Cobra" pickup has a small coil and a stainless-steel vane, which is welded to the stylus. The pickup coil is part of an oscillator which operates at 2.5 Mhz. Modulation of the record grooves causes corresponding variations of the Q of the pickup coil, which varies the output of the oscillator. "Plate bend detection" occurs in the oscillator tube, providing an AF output.