[Mr. Carlson] bought a Globe Scout Model 40A ham radio transmitter at a hamfest ... frequency oscillator (v.f.o.). Built-in antenna tuner permits use of any standard type antenna.

With the right antenna tuner, essentially any piece of metal can be connected to a radio and used as an antenna. There are a few things that improve that antenna’s performance, though.

On any given day, you might find him in the middle of Golden Gate Park setting up an antenna and radio tuners where he tries ... 150 members known as amateur ham radio operators who like to ...