HF Broadband Vertical

merlin

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Years back I saw an HF antenna on a destroyer. Now I found a drawing and wondering what type of antenna this is.
 

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kb5udf

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kb5udf

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What about a base loading coil? Is it possible there is one in what appears to be fat ceramic insulator at the base?
 

prcguy

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What about a base loading coil? Is it possible there is one in what appears to be fat ceramic insulator at the base?
I don't remember seeing one on a military type broad band vertical. A loading coil would be frequency specific and some of these antennas are a type of traveling wave thing where current is pulled through them to radiate by a terminating resistor and on some frequencies its more efficient with less power wasted in the resistor and other freqs more gets absorbed but it presents a reasonable match to the transmitter across a very wide range.
 

merlin

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What about a base loading coil? Is it possible there is one in what appears to be fat ceramic insulator at the base?
No loading coil, but guessing some form of tuner below the mount.
That ceramic insulator is the mount for the antenna, this is also the feed point. It is a stand alone antenna.
Just a fat verticle. the real antenna looks ruged as a car frame. Over all, about 15 foot.
 
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