I finally went outside with a tape measure – and there is no real way to do a 40M Bobtail or 5 element Bruce.
However, a 40M Half Square vs. a 4 element Bruce are so close that I would go with the Half Square. The big benefit here is that I get one antenna that can be multi banded instead of having 2 antennas with less gain.
I will be parked on 40M using the Collins Gold Dust Twins – so one of these days I will make up my mind given all of the trade offs – but it sure is fun revisiting this 40M antenna thing I’ve been obsessing about for so long . . .
All my recent work in and around the ham shack is because of these beauties . . .