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.
We found this circuit in the March 1992 issue of Radio Electronics magazine. The circuit has a...
This super metal detector uses three coils, operating in differential form with two transmitter and...
The circuit in the figure uses two of the 4001's four gates to trigger a relay in a timed manner. The...