Quote:
Originally Posted by wa8yxm
A J Pole it is not (though I do admit it looks like one) J Poles do not need radials or Ground planes. Grounding the mount should, in theory, make no difference on that style of antenna.
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It certainly looks like a J-pole. Why do you say it isn't one?
The presence of 1/4-wave radials doesn't mean it isn't a J-pole. J-poles are almost never a perfect match to the feedline, and it is often useful to provide some sort of choke to prevent RF from flowing on the outside of the coax. Such a choke can be a coiled bit of the coax, or a ferrite toroid (which is what I use on my J-poles) or --
ta-da! -- quarter-wave radials.
It may not be a J-pole anyway, of course; just wondered why you seem so
sure it isn't.
A closer photo would enable us to see how it's fed. Then we could tell for sure.