February 2016
Intermediate to advanced
216 pages
14h 38m
English
Content preview from Newnes Audio and Hi-Fi Engineer's Pocket Book, 3rd Edition
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161
650 oersteds. H.f. MOL is often some 2 dB lower than
comparable group
1
tapes, which partly offsets the lower noise
figure.
Group 3 (ferrochrome) Owing to the poor low-frequency
response of chrome, a dual layer tape of chrome on top of
ferric was developed; the chrome to carry the h.f. and the ferric
to take the l.f. It is now virtually obsolete.
Group 4 (pure metal tape with 70 ps equalisation) This has a
typical coercivity of 1100 oersteds, and a remanenee of
330 mT. The h.f. MOL. is some 4-10 dB higher than the
highest non-metal tape and there is a better balance between l.f.
and h.f. MOL. Higher bias (3-6 dB higher than chrome) and ...
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