Using Bobtails since 1984 and only on 40m.
Easy to build and tune, cheap compared to Yagis

You can have a pick on www.f6dxe.com (the site is in french but the pictures speak for themself)

At the moment 2 Bobtails are ready, I am building the third one.
They are all in the triangle made out of fiberglass pols.
This will allow 6 main directions.

Next month experiment will be to fire 2 bobtail at the same time using the triangle configuration, meaning that two bobtails along the same corner angle will be feed. This should result of a better concentration of the lob in one direction only.

73's
Dick (Didier) F6DXE