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 Popular Electronics of June 1978. The circuit is interleaved between the...
To protect your home, vehicles or even objects, what we present is a sensitive alarm circuit that...
This circuit was obtained from an English magazine from 1979, but can be easily assembled...