This tone control was obtained in the Audio Handbook of the National Semiconductor of 1977. The circuit controls the signals of medium frequencies in a wide dynamic range as shown in the diagram.
The figure shows a Wien Bridge circuit with non-linear feedback. The resistance of the RL lamp is...
This commercial medium and short-wave radio was manufactured in Japan in the 60s. The circuit has...
The energy that powers this radio's amplifier circuit is obtained from the signal itself. The coil...