This circuit with output powers of 2 to 3 W depending on the power supply was found in the magazine Radio Electronics of April 1990. The speakers are 8-ohm.
We find this circuit in an 80's EDN. The circuit can be used with equivalent operational,...
This oscillator is indicated for the adjustment of FI of FM radios, having its frequency...
Found in American documentation from the 1980s, this circuit has a throughput of 700 Hz and a flat...