This amplifier, whose mounting on a printed circuit board was described in Radio Electronics of October 1960, has 35 W of power. The power supply uses a transformer and a set of 5 tubes.
This circuit was taken from a Popular Electronics from the 1990s. The circuit triggers a relay that...
Found in a Popular Electronics from the 90s, this theremin is played by the position of the hand...
We found this circuit in a transistor manual from the 1960s. The transistor is the Germanium...