This converter for the 150 MHz band was found in an American documentation. Transistors are uncommon today and equivalents can be used.
Found in Popular Electronics from the 90s, this circuit can be used for high voltage applications and...
Found in a 300 Circuits from the 90s, this circuit can deliver a maximum current of 50 mA. The...
This ttransistor test was found in a 1987 documentation. It is a simple oscillator that allows to...