Found in an American publication from the 90s, this circuit allows the supply of 3, 6 and 9 V devices with currents up to 1.5 A in the car.
We found this circuit for increasing the sensitivity of an instrument in a 1960 documentation. The transistors...
This oscillator uses a small IF transformer taken from an old transistor radio. FET admits...
This circuit was found in a 1968’s publication and uses germanium transistors. Equivalents can be...