Found in American documentation from the 1980s, this circuit rejects strong MW stations that may be interfering with a shortwave receiver.
This receiver, whose tuning range depends on L1 and L2, was found in the 1992 special edition of...
In the figure, from a documentation from the 70s, we have a few-watt amplifier for general use....
This Texas Instruments circuit is from the 80's. However, it can be implemented with modern...