I'm using a similar bracket type, supporting a 10' section of mast. There is 7 to 8' of un-guyed mast above the top bracket. With a CM3016 antenna at the top, I get some wobble in high winds, I would not put a larger antenna up there without guys. I would recommend guying each section of a multi-section tubular mast.
Both of the antennas you are using are quite a bit larger than the CM3016 (and more expensive). I would be far more comfortable guying the mast that has to carry all that wind load.
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If the well is dry and you don't see rain on the horizon, you'll need to dig the hole deeper. (If the antenna can't get the job done, an amp won't fix it.)
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Last edited by GroundUrMast; 1-Jan-2011 at 5:45 PM.
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