The reproducer test tape affords the most satisfactory field means of standardizing magnetic sound recording systems. This method is nevertheless susceptible to numerous errors of measurement due to inappropriate test tape (wrong speed, equalization, track format, or test frequencies), and mechanical misadjustment of the reproducer (head height; asimuth and zenith adjustment; and poor tape-to-head contact due to dirt on heads, inadequate tape tension or wrap around the heads, improper vertex adjustment, worn heads, and improper tape guiding). These errors are described in order that they may be avoided.

Author: McKnight, John G.
Affiliation: Ampex Corporation, Consumer and Educational Products Division, Los Gatos, CA
JAES Volume 15 Issue 2 pp. 152-156; April 1967
Publication Date: April 1, 1967

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