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Convention Paper

The Measurement of Medium-Wavelength Flux on a Magnetic Tape Record

Authors: McKnight, John G.

AES Convention 36 · Paper 654 · April 1969

Abstract

Tape flux measurement is useful for standardizing program levels on magnetic tape records, and for measuring the performance of tapes and recording and reproducing heads. A ring-core head is the most satisfactory tape-flux measuring instrument, but calibration of the flux-to-voltage sensitivity is difficult in the general practical case. By using a -symmetrical head- construction however, the sensitivity is easily calculated and experimentally verified. For practical measurements, a -high-efficiency head- has the advantage of not changing sensitivity with wear. The flux-efficiency of the core, and the frequency- and wavelength-response factors are all calculated and experimentally verified for both the -symmetrical- and -high-efficiency- designs. A flux measurement accuracy of better than 3% is achieved.

Details

Published in
AES Convention 36
AES Convention
36
Paper number
654
Publication date
April 6, 1969
Affiliation
Ampex CEPG, Los Gatos, CA (See document for exact affiliation information.)
Type
Convention Paper