Ham radio antennas are interesting pieces of equipment. Lower frequencies require larger antennas. Smaller, hand-held ham radios have their antennas built in. However, any number of antennas can be used to transmit and receive shortwave signals.
More professional models transmitting on lower frequencies may have antennas that are mounted on towers. For the everyday ham radio operator, anything that will capture or transmit a radio wave can be used. Some unusual items that have been used for a ham radio antenna include aluminum extension ladders, flagpoles, rain gutters and even a Slinky!
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