Building an FM transmitter was simple for a 15 year old back in 1960. It was even legal as long as one used a whimp of an antenna which limited the range to about the size of your home. But if you just happened to put a longer antenna on it you could broadcast for miles while using very little electricity. Let us imagine that it was during the Cuban missile crises and that in less than 10 minutes of broadcasting got cars with strange antennas as well as a helicopter landing next to a certain home. We can further imagine that that little FM rig was slapped onto a motorcycle and moved a mile or so and back on the air for about five seconds which was just long enough to confuse the pinpoint triangulation of the broadcast point. That just might have happened in south Florida. i used to enjoy listening to such pirate stations in Brooklyn NY by the way. Today with modern equipment i'll bet a decent FM broadcast radio could be smaller than a pack of smokes and moved every few minutes.