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 circuit was found in a Texas Instruments optoelectronics documentation. The gain depends on...
A modulated (intermittent) siren, using the four gates of integrated circuit 4001 is shown in...
This circuit for RF signals was found in the March 1987 issue of Radio Electronics magazine. The...