I don't think it's the antenna. As I said, when I had only the C2V hooked up thru the preamp, I got the UHF channels full strength. Seems like there is interference somehow through the the combiner. I just don't know enough to know if it's just a crappy combiner or it's a function of all combiners that you lose that much signal strength by using them.
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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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