Portable Recorders
As A Profitable Sideline
Re-printed from "National Radio News,"
Vol. 8 / No. 4 August/September, 1938
Introduction
Prospects for Recordings
Choice of Equipment
Factors Affecting Fidelity
Recording Speeds
Pitch in Lines Per Inch
Types of Discs Available
Recording Technique
Making Duplicate Records
How to Determine Charges
Uniformity in Audio Discs
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