Using 4 tubes, this 1924 receiver combines new technologies as an intermediate frequency stage that was already beginning to appear. Listening is via phone and battery power.
This circuit was found in a Spanish magazine that no more existis, Mundo Electrónico, in a...
This circuit was found in a Mallory documentation from 1968. The integrated circuit is of the...
This is a transistor flip-flop suggested by General Electric in a 1966 paper. The transistors are of...