Did not consider a single bowtie worth naming in a bleeding edge section
Its still bleeding edge 1940's technology, which is still good, heh. With your above figures, that gives it about a 4.63 net gain on channel 5, which is better than all the other antennas found here http://www.hdtvprimer.com/ANTENNAS/comparing.html
, with the exception of Winegard YA-1026 Wideband Yagi for VHF 2-6 and Channel Master 3671B VHF/UHF combo. And youre not done tweaking yet !
Back view picture of the head I have :
Top view picture:
The feedpoint gap is 1 24/64 inches (1 3/8 inches). The forward swept angle is 100 degrees total on the top view picture. The looking at the back view, the spread angle is about 45 degrees total. And thats a 3/4 inch square boom piece.
We had the typical double bay version of the vhf-bowtie when I was a kid and had no trouble pulling in stations that were 80 miles away consistantly and relatively snow free with the antenna only mounted about 20 ft high.
One of the amazing things about the bowtie is, from the link holl_ands found, is that the bowtie was patented in 1898, and has been "discovered" again at least few times since then, heh.