This antenna mount is just what I was looking for to mount a roof antenna in the attic (I know). The base can be rotated and is therefore ideal for mounting the antenna on a sloping truss. I installed a 100 mile antenna with a booster on it and everything worked as it should. As mentioned, I was able to position the base directly on the truss, allowing me to use the adjustable bolt/slot to get the pole perfectly vertical. Then I experimented with different orientations, using the antenna's U-bolts to attach it to the mast, until I got the best possible signal. If you are thinking about installing an antenna, do yourself a favor and get one. He's cheap
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