This simple radio was found in a Popular Electronics from the 90s. L1 and L2 have 100 turns on a toroidal core and L1 have a socket on the thirtieth turn.
We find the original version of this circuit in an English publication (1986). It is a...
Found in British documentation two years 70, this circuit generates two beats, being one of 800 Hz...
L1 is formed by 80 turns of wire 28 in a ferrite rod to tune medium waves range. The circuit can...