I built an 8-element dual band cubical quad antenna for 2m & 70cm. I finished it this morning and will be putting it on the tower mast at 30' tomorrow afternoon when a fellow ham is available to lower and raise the tower. Should be interesting to see what sort of reach this baby has with its 13.8 Db calculated gain. I'll be checking its performance with my 5W dual band Wouxun HT as well as my 50W Yaesu FT-8800 in the shack. Details to follow. Here are a few pics before it goes up. The boom is 91-1/2" long, 1" sq. alum tubing with 1/8" wall, 3/8" dia. fiberglass spreader arms held in place with 3/8" E-clips. Elements are 16ga. copperweld wire soldered at the connection points. I designed the layout in AutoCAD so that the 70cm band elements would not be under the 2m elements.
From the reflector of the 2m end.
From the last driven element of both bands.
Some spreader details,
Full view.
From the reflector of the 2m end.
From the last driven element of both bands.
Some spreader details,
Full view.