This small receiver for the medium wave range was found in Radio Electronics magazine from July 1958. The circuit is for listening to headphones and powered by batteries.
This circuit was obtained in a 1979 101 Electronics Projects. The circuit can be assembled easily,...
This circuit with the known PLL 567 can be found in other versions in this section and in this...
Found in Radio Electronics from the 90s, in the figure we have conventional voltage doubler with...