This circuit was found in a Radio Electronics from February 1966. The circuit operates with a common battery and the frequency is given by the resonant LC circuit.
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...