The outer insulators are used to isolate the antenna from the tether lines, which should be rope or nylon cords for good results. The inner insulator isolates a gap between the two long wires of the antenna. The length of the wires used for the antenna is critical. As a rule of thumb, a wire half-wave antenna's length in feet is equal to 468 divided by the frequency in MHz. The info in that book can be used for setting up an underground AM or FM radio station.
Commercials are an opportune time to break into TV broadcasts.
Encourage people to call in using Red, Blue, and other phreaking boxes. Annother way is to give the number of a local phone booth and use CB or other means of transmission to get it back to your booth. Both of these methods can give away your city of origin if someone looks up the are code. Then you call the machine, enter the code number, and get your messages.