This is one of the first radios with an integrated circuit. The circuit is from a Radio Electronics from November 1969. The circuit is powered by a 9 V battery.
This circuit is suitable for use with 1400 kHz range FI receivers. Changes can be made to other IF...
This circuit came out in the American magazine Electronics Now, in a 1993 issue. The magazine no...
This circuit produces rectangular and triangular signals using two 741 operational. The source must...