[ARDF] Does anyone have a good design for a Halo Antenna?

[Matthew Robbins]

I'm looking for a simple, durable, and easy-to-build halo antenna design for 2m.

I've been reading about them, and some of the stuff says building
Halos is as easy-as-pie, and other stuff says it is really
complicated, touchy, and it's all just trial-and-error. I'm planning
to build five of them, so I'm hoping for the former.

I'm interested in Halos because I want horizontal polarization without
the size of a turnstile (or eggbeater).

Matthew
Cincinnati