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Compact Cassette tape types and formulations
Hot-dip galvanization
Tape bias is the term for two techniques, AC bias and DC bias, that improve the fidelity of analogue tape recorders. DC bias is the addition of direct current to the audio signal that is being recorded. AC bias is the addition of an inaudible high-frequency signal (generally from 40 to 150 kHz) to the audio signal.
Cassette tape - Wikipedia ... Cassette tape
The first commonly available increase in tape length resulted from a reduction in backing thickness from 1.5 to 1.0 mil (38 to 25 μm) resulting in a total thickness reduction from 42 to 35 μm (1.7 to 1.4 mils), which allowed 3,600 ft (1,100 m), 1,800 ft (550 m), and 900 ft (270 m) tapes to fit on ten-and-a-half-, seven-, and five-inch reels respectively.
Reel-to-reel audio tape recording
Galvanization - Wikipedia ... Galvanization
Many lengths of bias-cut fabric can be pieced together into a long "tape", which is typically sold in metre or roll lengths by haberdashers. Bias tape varies in width from extremely narrow (1 ⁄ 4 in [0.6 cm] wide when flat) to extremely wide (as wide as 3 in [7.6 cm] or more). Bias tape is used in making piping, binding seams, finishing raw ...
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