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OTA: The Big Trees Factor

21091 Views 55 Replies 20 Participants Last post by  stampeder
tigerbangs said:
Stampeder: get that 4228 and the 1111 up on the roof and quit your stalling!
Oh the irony! Here I am cheering on OTA converts, yet I can't enjoy it myself the way I'd like to! I am chomping at the bit to get those up and running but actually I've now done 2 test placements on the roof and the results were really awful due to the tall trees. I can't seem to find a sweet spot anywhere in the yard after dragging around my CM4228 on its mast, with my LG tuner with a 13" TV in tow. Also 4DTV_HD offered to come by with his spectrum analyzer to see if we can find one but I doubt that we would so I don't want to waste his time. I had to put my ugly little satellite dishes up on a 10' pole in my vegetable garden just to see the BEV sats.

:( My only choices are

1) put up a 60' tower
2) chainsaw massacre (illegal - the trees are protected, and we love them too)
3) move
4) climb that big tall fir tree and put all the gear up there (not!)

We'll see, but I tell ya its frustating, like having a Jacuzzi with no water connection. ;)
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Evergreen trees will really knock down a TV signal, I've seen many times when an antenna near the ground pointeing below the tree branches will work much better than one higher pointing into the bulk of the trees.

If you are receiving stations in a different direction of where you should it could be a reflection. I have a station I can receive some times that's located NW of me but only get it when I'm pointing my antenna SSW and getting a bounce off of a near by hill.

I can't explain your odd reception conditions, but I will explain how things should effect the antenna and maybe that will help.

If you are using swept forward elements the signal should be stronger in the swept forward direction (about 1-2db). If the elements are flat you should get a reception pattern nearly the same either direction, broadside to the elements.
Make sure that the reflector is oriented so that the 2" spacing is running horizontally and the 4" spacing is running vertically.

This style antenna has a narrow vertical beam width, depending on ground conditions, they will work quite well at near ground level compared to some.
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