This circuit is from a Radio Electronics from April 1964. The circuit uses power transistors of the time, which must be mounted on a good heat radiator. Modern equivalents can be used.
This circuit makes use of comparators and common operational amplifiers, having been found in...
Standing wave ratio or SWR is an important measure of whether all power from a transmitter is being...
A configuration using three of the four voltage comparators on the LM339 is shown in the figure and...