This simple receiver of two transistors for the 80-meter range was found in an American documentation from the 1980s. The transistors admit equivalents and the antenna must be long.
) Found in a 90s Linear Technology documentation, this circuit is a fading of video signals and...
This is an RF amplification step for small signals using the common base configuration. The...
In the figure we have the way to use a 4017 as a sequencer controlled by a microcontroller. With...