This simple two-transistor FM transmitter was found in the November 1991 issue of Radio Electronics magazine. The circuit has a 2 + 2 turn coil of 28-gauge wire with a diameter of 1 cm.
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...