This circuit is from a 1924 book by Gernsback. The receiver uses two tubes and listens to headphones. Power is supplied by battery with the indicated voltages.
This traditional configuration of a white noise generator that uses the junction of a transistor with a...
We found this circuit in a Popular Electronics of the 80s. Used integrated circuits are uncommon...
This high input impedance amplifier stage was found in a 1963 documentation. The transistor...