Have my first SBGH up & working. Really enjoyed building it - this writeup somewhat less so
But here are the details, basically payback of sorts for all the people that helped me.
I got a drill press off kijiji for $50 to drill the holes in the pole. I tried it with my handheld & there was just NO WAY.
First, here is a pic of the overall package;
I'll admit I used an 8' wooden pole (Rona). I read that antennas are forgiving of vertical metal poles, however, there is a gap in the SBGH reflectors for a reason and I didn't want the pole interfering. So, instead of building an antenna & then strapping it to a pole, I built an antenna ON a pole.
A bit closer;
The 1/4 aluminum reflector rods (Metal Supermarket) are held in place with plastic faucet plumbing tubes, (credit Effects here http://www.digitalhome.ca/forum/showthread.php?p=816340&highlight=easily+SBGH#post816340
The reflector rods fit into the plastic faucet plumbing tubes but I suspected they would sag overtime. Thus I embedded 1/4 inch fiberglass rods in the faucet tubes in the gaps between the reflectors, just cut them to "gap size" then pounded the rods in on either side for perfect separation and to keep the rods, um, perky.
The yellow rod visible above is 3/8 fiberglass from RONA. It sits in a grey plastic tee also from RONA. The 3/8 fiberglass rod extends out from the pole into the tee as well (sorry not visible in the pic) and the another (visible) rod extends out of both sides of the tee for the element to attach to via plastic ties.
The 3/8 fiberglass rod needs a bit of tape around it to be snug in the plastic tee. This is fine, it makes the distance between the reflectors & element "fine-tunable".
It's on my roof & working. A bit early to tell if it outperforms my cm4221. Moving on to an M4 and some incarnation of GH + VHF-HI next.