Instead of starting a new thread, I'll just bring this one back. I finished work on a 6m Hex Beam today, got it up on 6 sections of mil surp mast, somewhere between 20-24' high. The band isn't exactly open right now but I worked a friend a whole 8 miles away with no trouble, aimed about 45 degrees off of his QTH.
I have one more section of mast I'll add. The SWR lowered and flattened slightly as I added sections, so I'm hoping one more will make it even better.
I used 14# bare copper wire my friend gave me, $2 4-foot fiberglas fence posts from Tractor Supply for the spreaders, and made the hub out of a scrap of 1" pine (it's 1" thick, 9" across). The spreaders go into holes drilled into the edge of the hub, and there's a hole through the center to slide over the top of the mast. I just ordered some 90 degree connectors because the poor coax has to make quite the bend.
For cable connections, I made a little plexiglas bracket for an SO-239 connector and some mounting bolts for the driven elements. You can see how the spreaders go into the hub here too. Sorry for the blurry pic, I had to grab a screen grab of a zoomed in video to show the detail.
I contemplated adding a 10m element as well but I think the spreaders are too short. If I had used 6' driveway markers instead it would have fit no problem.
Element lengths came from here:
Specs | Build your own Hex Beam
SWR is okay, below 3:1 across the band. I'll keep checking 50.125 throughout the day and see if I can get some contacts.