Variable attenuation equaliser with series resonant circuits - has differential rotary capacitors, input signal splitting transformer and output signal combining transformer

摘要

The variable attenuation equaliser consists of signal splitting transformers, coils, capacitors, resistors, differential transformers and resonant circuits containing differential rotary capacitors. The input signal is applied to a first signal splitting transformer and the output signal (U2) taken from the a signal combining transformer (T2). The first transformer's secondary adn the second transformer's primary each have three connection points: a tapping for a through connection, one end connection for a circuit containing a differential transformer (T3) and rotary capacitors and a second end connection leading to an inductor and a four-pole network (V).