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Gap irregularity effects in tape recording

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1 Author(s)
Mallinson, J.C. ; Ampex Corporation, Redwood City, Calif.

In all practical heads the gap deviates from straightness. Such irregularities reduce the output voltage. Assuming that a Gaussian distribution, of variance σ, describes the irregularities, the loss in output is shown to be(13 sigma/lambda)^{2}dB. Inordinate losses are avoided if the variance in each head be less than 0.1λ.

Published in:

Magnetics, IEEE Transactions on  (Volume:5 ,  Issue: 1 )