Audio Recording Tapes Based on Iron Particles
Tapes based on acicular metal particles can be made which, under conditions typical for audio cassette recording, give an outstanding performance when compared to chromium dioxide (CrO/2): an increased signal-to-noise ratio (about 3 dB) combined with a better high-frequency maximum output level (up to 9 dB). Although these tapes have a high coercivity (about 75 kA/m), these results can be obtained with a bias level setting which is only about 3 dB higher in comparison to Cr0/2. They can be used with the same playback equalization.
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