This circuit was taken from a Popular Electronics from the 90's. The power step can be changed to operate with the most powerful LEDs available today.
This circuit was found in a 1987 magazine. It generates signals in a range from 100 kHz to 10 MHz,...
This circuit couples 600-ohm signals to a line of the same impedance consisting of an amplifier stage....
In the figure we have an interesting circuit for those with a project that requires a sub-multiple...