Energized antennas

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wbswetnam

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A poster warned me not to put a dipole antenna in the attic of a house because the heat from the radiating wire element could ignite the wood beams in the attic. So if I use an 18ga wire for a dipole antenna, does it really get that hot with only 100W (average) transmitting power on HF? Should I not use insulated wire as an antenna, in this case?
 

popnokick

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At 100W input power to the a antenna it will not get warm enough to even measure without a very sensitive thermometer. In short, your antenna and 100 watts will make a lousy heater.
 

wbswetnam

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Looking back at the post, he seemed concerned that a corona ball at the end of the element tips could cause a fire if they occured near the wooden rafters. Is this a possibility? If so how are corona balls avoided?
 

popnokick

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Not an issue for a wire dipole antenna at a fixed location running 100W input. Read:
http://www.k0bg.com/static.html
 
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