This common circuit using operational amplifiers was found in the 1993 issue of Radio Electronics Special Projects. The circuit is sandwiched between the pickup and the amplifier input.
This analog TV circuit can be used on a small transmitter. The circuit is from an 80's American...
This antenna or booster amplifier operates with signals from the midband (MW) range up to the VHF...
This circuit was found in a documentation for radio amateurs from 1978. The resonant circuit...