Calculus, radio dials and the straight-line frequency variable capacitor.

MATHEMATICAL analysis; CALCULUS; VARIABLE capacitors; CAPACITORS; MATHEMATICS; DIELECTRIC devices; ELECTRIC equipment; ELECTRIC capacity; ENERGY storage

Most often radio dials of analogue radios are not uniformly graded; the frequencies are cramped on the left side or on the right side. This makes tuning more difficult. Why are dials made this way? We shall see here that simple calculus can help understand this problem and solve it. [ABSTRACT FROM AUTHOR]

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