G5RV. I cut some radioshack 300 ohm twinlead to 35 ft and hooked one end to a dummyload and the other to my swr meter and then to the radio. I can not for the life of me get the this feedline tuned to a low swr. I am down to 27 ft and the best i can seem to get is 3:1. Has anybody used radioshack twinlead and how many ft is the feedline supposed to be using this junk.