The purpose of this circuit is to measure the resistance of an antenna at the resonant frequency. The circuit is from an old American documentation for hams.
This circuit was found in an American 80's documentation. The operational may be a modern type...
November 2016 - The new self-adhesive surface temperature sensors of the Amphenol JS series can...
We find this circuit in a manual of the 80's own used components. The circuit provides an...