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Guyed Mast Antennas
A Tower Antenna can be used if sufficient land is not available for a Symmetrical "T" Antenna. A portion of the top set of guy wires is used to form the top hat for this antenna. A Tower Antenna is electrically inferior to a Symmetrical "T" Antenna of the same height due to the decreased top loading. Top loading serves two purposes; decreasing the input reactance and consequently the voltage on the antenna and increasing the effective height. A 50 foot tower requires a plot of ground with a radius of 60 feet. Range over "good" ground varies from approximately 40 miles at 190 KHz to 50 miles at 535 KHz with a 50 watt transmitter and from approximately 60 miles at 190 KHz to 65 miles at 535 KHz with at 100 watt transmitter. Used when space is limited. Available heights:
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