| 摘要 |
A record player with a scanner for record disks is provided, where the vertical recording track angle alpha is to be placed within predetermined limits, but where, in general, the value of alpha is not known. The scanner comprises a transducer which generates useful signals and which is provided with elastically supported and therefore movable scanning elements. According to the invention, means are provided for determining the difference alpha - beta of the recording track angle alpha and of the tracking track angle beta . The angle difference determining means generate a voltage which depends on the longitudinal motion of the scanning elements moved during the useful modulation and which is displayed and/or employed for correcting the track angle. A record player with a tracking sound pick-up arm for the tracking of record disks is provided. Means for tracking a groove on a side of a record disk are disposed elastically supported and thus movable on the sound pick-up arm. A first transducer is disposed on the tone arm for generating useful signals. A second transducer is provided for transducing of the voltage generated by detection of a longitudinal motion of the scanner.
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