Looks like I'll have to use a horizontal loop in the attic for a few months.
Any opinions on how to best feed it?
--open wire
--coax coil balun
--ferrite bead balun
--straight coax

The loop is about 13 feet per side, and I want to operate 20 meters and up.
In the past I have simply used a coax feed without a balun. It worked OK,
but there was a lot of stray RF around the house.

TIA