Got the new antenna up and working yesterday, wanted to thank all for the help.
Went with the Rayzar on a modified Sensar mask. Cut the square tube down 4", so gained 7" over the stock Rayzar mask. Since the A/C unit is in the center, highest point of the roof, the Rayzar's line of sight now clears that nicely.
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The biggest hurdle ended up being inside the RV. The factory had cut a way over sized hole for the Jack, NONE of the mounting screws for the new crank plate hit wood. So I had to frantically run out yesterday morning to find some sort of structural extension plate.
After hitting all the big box hardware stores, and thinking I was going to have to fabricate something from a piece of wood or whatever (which more likely would of looked like crap), found a neat solution at the local Michaels Arts and Craft. Used the 8" version.
Wilton separator plate
And of course a new Sensar PRO to finish off the job.
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So how did it work? Even though we have CATV in the home, I also have an OTA system, with a directional antenna up in the attic, pointing at the towers (out in Driver, Va.) On the main SOTA Samsung TV in the living room I get 40 channels.
In the RV with the Rayzar I got 36. Good enough. :)
BTW, one thing that was interesting. When one shakes the Rayzar, it sounds like a maraca :@, evidently there are a bunch of coil wires inside. So we will see how this thing holds up over time.