Radio with amplifier (CB20486E)

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

900 MHz Amplifier THS3491 Using Single Source (CB19657E)
The configurations of the two previous circuits can be modified to operate with a simple power...
AGC for Receivers (CB4214S)
This circuit is intended for communications receivers. We can find it in a documentation from the...
27 MHz Receiver (CB18516E)
This receiver for listening to headphones and 2-battery power was found in Japanese documentation from the...