plug wire resistance testing

The spiral wound core works on the RF choke theory. Or at least it's supposed to. I've found they only work to a degree mainly because it's only effective only over a certain frequency range. I'm a amateur radio opperator and have radio equip. in my truck as well as a stereo system and tried the spiral wound wires and found them to be much better than a solid core wire but not nearly as effective as a carbon core wire.