This oscillator was found in the July 1993 Electronics Now magazine. The coil is wound with 28-wire in a 0.5 cm shape.
This circuit came out in a Popular Electronics from December 1995. It is a double T configuration that...
This low power amplifier, with 2 W in charge of 16 ohms, was found in a Japanese magazine from the...
This circuit was found in a 1967 US documentation. It shows how to build a gain control by digital...