This Wien bridge oscillator was found in Radio Electronics from the 90s. The circuit uses the 741 which is a current component. The circuit requires a symmetrical power source.
This simple circuit is from a Radio Electronics from July 1965. The circuit can be assembled with...
This 6-transistor transistor radio was manufactured in Japan in the 1960s. It is a portable...
This 3-transistor circuit was placed inside a doll, as indicated in the text in Radio Electronics...