This circuit was obtained from a 1980's QST magazine. The circuit can generate 1 to 15 MHz signals with 1 Vpp at 50 ohms load. Used transistors are still common today.
In the figure we show a configuration for a crystal controlled overtone oscillator using a...
This circuit, used in radio communication, converts CW signals and tones that allow you to follow...
The figure shows how to implement the AND function with a Norton LM3900 operational amplifier. The number of...