I feel like I have asked a really stupid question. My reasoning is this . The plug and cable are surounded by a grounded metal plug cap and wire mesh. What does this do? Is this setup part of the shielding? I have heard mention of a resistor type plug about which, I confess, know ziltch. Amoung other things you say? Anyway, a CF fus must carry the antenae on the outside because the CF interferes with the incoming RF. Does it not stand to reason if the CF won't let it in, it won't let it out? Another layer of protection is a good thing, No?