With this circuit from the September 1989 issue of Radio Electronics magazine, it is possible to receive VLF band signals on a common radio, just like the signals emitted by the previous receiver.
We found this limiter (clipper) in a French documentation from 1982. The circuit applies to any...
Found in a 90s Elektor, this mixer makes use of integrated circuits of the time. The supply must be...
Other operational amplifiers in the series, such as the MC34072, MC34074, MC35071, MC35072,...