Found in a 1980s amateur radio QST magazine, this is the conventional circuit of a medium-wave radio. Coils and transformers are commercial types.
This circuit generates signals of different waveforms thanks to the use of a relaxation...
This converter converts signals from the 50 MHz band to the AM band, making it possible to receive...
This circuit appears in various parts of this site and this section, with diverse origins. This is from...