Radio with amplifier (CB20486E)

We found this circuit in a publication of 1991. The audio amplifier is an operational that admits equivalent.

Remote Control Test (CB4376E)
This circuit came out in the American magazine Electronics Now, in a 1993 issue. The magazine no...
Complementary Transistor Oscillator (CB495)
Audio signals can be produced by this circuit. Frequency range is determined by C1 and adjusted by...
8 Channel Encoder with 4017 (CB4530E)
This circuit was obtained from an English magazine from 1979, but can be easily assembled today...