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.
Found in a 1968 US publication, it is a font filter. The transistor is according to the desired...
This circuit was found in an American publication from the 70s, but it can be assembled with more...
Found in a 1995 Hands On-Electronics, this circuit generates a sinusoidal signal whose frequency...