We find this circuit in American documentation from the 1980s. It consists of a frequency folder using a varicap. The capacitors and coils depend on the frequency of operation.
This circuit measures the power of a transmitter being sandwiched between the antenna output and the...
This circuit was found in a 1970s documentation. The integrated circuit used is uncommon today....
Published in the December 1988 issue of Radio Electronics magazine, this circuit converts your...