Raytheon's used integrated circuit is no longer common today. The circuit was obtained in a documentation from the 80's and must be powered by a symmetrical source.
This circuit was found in a Popular Electronics from the 90s. It is based on components still...
This circuit covers the bands from 1.8 to 150 MHz, with plug-in coils whose characteristics are...
The coils of this circuit are links made with common wire in the dimensions indicated. The circuit...