This is the circuit of a commercial radio sold in Japan in the 1960s. The IF is 455 kHz, and the supply is made with a voltage of 9 V. The radio receives stations in the medium wave range.
These integrated ones consist of class B amplifiers with gain fixed 24 internally for better...
Found in a 1967 publication by General Electric, this control is intended for motors up to 2 A...
Found in RCA documentation from the 90s, this bass and treble control uses an operational...