This circuit can be used as an amplifier for musical instruments or even with your cell phone. The circuit is old and was found in the 1990 edition of Radio Electronics Experimenter magazine.
This circuit delivers at its output a voltage that proportional to the amplitude of the input...
This circuit can be used to listen for SSB signals on receivers that do not have the built-in...
We found this circuit in a 1970 General Electric manual. The circuit uses components that are...