This circuit uses a parallel resonant crystal to control the frequency. The circuit is from Radio Electronics magazine, February 1993. Equivalent transistors can be used.
This source regulated with transistors appeared in an American publication from the 1980s. The...
This circuit has already been explored in other articles on this site. It shows how we can use two...
This transmitter operates in the 80-meter range, around 3.5 MHz, with an exact frequency value...