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C2, if you're serious, I've been building a home made 1/4 wave antenna using 102" whips for the radiator and radials for some years now. I use a mobile L-bracket attached to an aluminum tube that will allow an A99 GPK hub to slide on...just below for the L-bracket.

 

I have a hub that will allow three radials at about 25* degrees, and I have a stock A99 hub with 3 slanted radial ports, and 4 horizontal ports. I call this my Marconi x.

 

It works very well and the match is very good.

 

Here is a picture of the base of the antenna on a short mast without the whips.

 

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