This integrated amplifier was found in a non-existent British magazine from 1975. The used integrated circuit is still popular and the mono bridged version can provide 36 W output power. 4 A.
This circuit simulates the effect of an inductance. Equivalent operational amplifiers can be used,...
This amplifier, from an Argentine publication from the 1970s, uses germanium transistors with...
The traditional circuit was taken from a French magazine Radio Plans that no longer exists but can...