Found in a February 1949 Radio Electronics magazine, this dual tube mixer has 4 inputs. Power must come from a 250V source.
Using an LDR as a sensor, this circuit is from the Radio Electronics magazine of December 1984. The...
A frequency range determined by the network of resistors and capacitors with negative feedback and input...
The energy that powers this radio's amplifier circuit is obtained from the signal itself. The coil...