This small phonographic amplifier was found in a 1967 General Electric documentation. The integrated circuit is from that time, providing 1.5 W of output power.
This high input impedance circuit uses a symmetrical source. Found in the October 1993 issue of...
I found this circuit in a 1986 English magazine. It can still be easily assembled, replacing the...
This is one of the many versions of amplifiers with LM386. This was achieved in an old publication (1981). The...