Let's keep this all in the same thread.  Here is the post from the parallel thread you just opened:
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					Originally Posted by  Smityyone
					 
				 
				I'll likely order a BD4e antenna based on recommendations from here.  I know getting the antenna as high as possible will give me the best results, but I'd prefer not to install it on my roof peak, instead wanting to use a J-mount (or  https://www.youtube.com/watch?v=Uas1t68hW8E) attached to my fascia.  My roof has a very shallow pitch, so I'd only be losing about 5 or 6 feet in height.  What is the tallest mast I can attach to these mounts, what diameter pole, and where to buy?  Although I would prefer not to, I could add two supporting braces if that would allow for an even taller mast.  Where would I get these supporting braces if needed?  
			
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 Depending on windiness, I wouldn't go much over 5 feet on an J-mount with a DB4e.   Lots of places sell these as kits with the 1.5" or 2" mast and all necessary hardware.  Solid Signal comes to mind, Antennas Direct sell them as well.