I believe there is only one way to measure the benefit of this. It's amazing to measure it. I sat in my driveway and edited all 14 channels that I could easily pick up with my regular Winegard antenna and they were basically all in the 71-74% range according to my TV on wheels. I put on this nozzle, which is essentially nothing more than a director for a pseudo-yagi-ud antenna (no reflector?) and measured again. All stations are now in the 82-85% range. I don't have any information on what % means for my TV in terms of signal strength and noise, but it did two things I expected: 1) My antenna became more directional. Now I have to tweak a bit every channel that isn't basically going in the same direction, and 2) it has improved signal quality / reduced dropout when going in the right direction. It really affected the signal quality for me. At the price I'm really blown away. I am very impressed with the Winegard material and this one is no exception. You pay a lot for it, so if you watch a lot of TV from the camper, it's worth it. Unless? You can buy a lot of beer for that.
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