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.
The circuit shown in the figure is intended for medical applications where the sector in contact...
This circuit was found in an integrated circuit manual from the 1980s. The circuit can be designed...
This 1969 Electronics World power supply has 5 V to power digital circuits and a 170 V output for...