Improving the Fidelity of Disk Records for Direct Playback

Recent advances in design, and in materals of which the recording disks are composed, have resulted in improved fidelity. Both the volume range obtainable, and the frequency range, have been extended, satisfying present-day requirements of motion picture and broadcast applications. — For reproduction, there is provided a new light-weight lateral pick-up having high sensitivity and equipped with a permanent diamond point. This reproducer, in combination with its associated circuit, is suitable for use on all lateral cut disk records. — Pre- and post-equalization are employed in making high-fidelity records, insuring a low noise level. This reduction of background noise together with the wide frequency range and low distortion create an illusion of realism or “presence” during reproduction. — Usually a large number of playings is not required from direct playback disks. However, because of the low mechanical impedance of the new RCA pick-up and the improved composition of the disks, it is possible to reproduce many times without appreciable increase in noise or distortion.

Print ISSN

0097-5834

Published

1939-03

Content type

Original Research

DOI

10.5594/J12014