This amplifier, from Philips Databook is suitable for automotive applications. The input resistance is 60k ohms and the frequency range is 20 to 20 kHz.
Based on an LS3404 this circuit was found in the July 1990 issue of Radio Electronics magazine. |...
This circuit uses common components at the time of its publication in the 1980s. The circuit can be...
We found this circuit in an Argentine publication from the 70s. The coil can be made with 80 turns...