Finely compensated volume control, with correction depth adjustment on a single-tap resistor. Scheme, description

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Finely compensated volume control, with adjustment of the correction depth on a single-tap resistor. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Tone, volume controls

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A diagram of a simple TEG developed by the author with adjustable correction based on a resistor with a tap is shown in Fig. 6. Adjustment of the correction depth at the same time for the lower and higher audio frequencies is performed by a variable resistor R1. If adjustment in the higher frequency region is not required, you can eliminate the capacitor C2, and reduce the resistance of the resistor R3 to 10 kOhm. The disadvantage of such a TRG (as, indeed, of all circuits with first-order circuits) is the insufficient correction of low frequencies at the lowest volume.

Rice. 6 (click to enlarge)

As already noted, by adding a corrective circuit similar to that shown in Fig. 3, the degree of frequency response rise at lower frequencies can be increased. Using the proposed principle, it is easy to introduce a loudness regulator into industrial sound-reproducing equipment.

Literature

Ivanov A. Finely compensated volume control - Radio No. 12/1993 p.21
Zuev P. Volume control with distributed frequency correction - Radio No. 8/1986 p.49-51
Davydov M. Acoustic systems of broadcasting receivers - Radio No. 4 / 1956 pp. 52-54
Bozdeh J. Designing additional devices for tape recorders (1977, translated from Czech) - M. Energoizdat, 1981. pp. 174,188.

Author: A. Shikhatov; Publication: bluesmobile.com/shikhman

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