Found in American documentation from the 90s, this circuit keeps the high beam on for a time determined by the trimpot adjustment. The relay is sensitive 12 V.
We got this circuit in a publication of 1987. This is an audio limiter, a circuit that cuts peaks...
The circuit in the figure operates at frequencies from 4 to 20 MHz and also uses a common junction FET...
Depending on the output transistor used, this transmitter can provide power from 1 to 3 W. The...