Found in a 1967 EEE, this circuit uses the signal from the alternating current power grid to produce pulses from a Unijunction. The circuit is directly excited by the mains voltage.
This circuit was found in an old Linear Technology documentation. The working principle can be...
Scratch is the scratching noise that occurs on old, scratched discs and the rumble is the...
This 6-transistor receiver was manufactured in Japan in the 60s. The circuit is superheterodyne and has a 6V...