yes dear I know the strap is self resonant and you will see it if your dip meter will go high enough. What I was saying.... in response to Originally Posted by G0HZU I think that by putting the dip meter at a copper grid strap you will be measuring for a resonant dip that will be affected by whatever reactance is in the anode path to chassis and also whatever is in the cathode path to chassis. " I don't think enough energy can be coupled into that strap to see any other resonance other than the strap. I forgot.... Yes quarter wave verticals stubs or an I beam falling through the air will resonate.