Tallest antenna mast
 

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?

My response is in your original thread.