Sue..i thought this was goofy when i first heard about it also.then i did a search and found many places that were selling them.two pull out from a central pole to form a "T",there is more to it than that but i don't understand the other electronic bits where the two join a main cable to the radio.on radio blogs they say you can hang them across a attic on a rope for pirate radios so the antenna does not show up outside your house.
our poster who had the rig on the bed of his truck would know more.