This RF amplifier step has a dynamic range of 140 dB and can amplify signals from 0.5 to 40 MHz. FET is old, but modern equivalents can be used.
This analog TV circuit can be used on a small transmitter. The circuit is from an 80's American...
This filter rejects 1 kHz signals, being suggested by the manufacturer of the operational...
This circuit was obtained from an American publication from the 80's. We can use a BD136 instead...