This circuit was found in the March 1980 issue of Radio Electronics magazine. It is based on the newly released LH2400. The circuit must be powered by a symmetrical power supply.
This 1-transistor reflex receiver was found in a 1963 publication. The coil is for the mid wave...
This circuit appears in various parts of this site and this section, with diverse origins. This is from...
Using a ceramic resonator, it is possible to vary the frequency between 4.9 MHz and 5 MHz. The...