Hex Mast

The mast is made from 1 1/2" diameter PVC pipe (1 3/4" outer diameter). It has a cap on the top to keep rain and animals out.

Measurement

Length

20m feed to 17m
16"
17m feed to 15m
5.5"
15m feed to 12m
4.5"
12m feed to 10m
3"
10m feed to base plate
13"

I'll have to add the actual measurement, but if you use 45" total length you should be OK. That's the total of the measurements above plus 3" headroom.

That said, the bottom length between the base plate and the 10m could be a few inches higher to line up with the final place where the wires ended up on the spreaders.

Each bolt is brass with several nuts stacked on. There's the bolt, one nut tightened down against the PVC, another holding the wire lug on, then another for the feedline/coax. On the top 20m driven element, there's another nut for the coax feedline from the shack.

Mark the PVC and drill holes for the nuts. The single bolt for the reflective elements is in the center of the back, while the two for the driven elements are on the opposite side, seperated by 60 degrees of the circle. I fished the bolts into the holes from the inside by wrapping a piece of wire around the bolt and then looking down the tube as I tried to find the hole. It sounds harder than it really is.

These are the bottom three bands (10, 12 and 15 meters) driven elements as attached to the mast. The feedline hasn't been added yet.

 

Closeup of a reflective element attachment. Both wires are simply attached to the bolt with no other electrical connections.