Datasheet of This amplifier uses a pair of complementary transistors at the output and can provide 1 W of audio at a load of 3-ohm. Higher impedance speakers can be used. The circuit is from an English publication from 1986 and TR1 can be a | BC548. The supply can be done with voltages from 9 to 18 V. The trimpot adjusts the resting current, which must be in the order of 20 mA.
The circuit of the figure is a current regulator with adjustment in the range of 0 to 3 amps. The...
We found this circuit in the May 1989 Radio Electronics magazine. The circuit can have its values...
This circuit was obtained from an American 1980s documentation. The frequency depends on the...
