This amplifier is from Motorola's 1990 Linear Databook. The circuit can be used with operating amplifiers with the same characteristics and the power supply must be symmetrical.
This powerful FM transmitter with FET can reach more than 1 km in favorable conditions. L1...
Found in Popular Electronics from the 90s, this circuit generates two tones that are selected by a...
Found in a 73 magazine for radio amateurs of the 90s, this circuit provides a 2 kV voltage with 7.5...