Reg Edwards wrote:

If there's a problem it is more likely to be picked up on the feedline
which is not influenced by the presence or absence of a screen around
the loop.

Agreed

If something must be screened then screen the feedline.

It generally is screened already (coax) but it does need some kind of
balun.

It's amazing how many loop designs are paranoid about balancing and
screening the loop itself, but then connect the coax in a totally
unbalanced way. The result is a beautifully balanced loop in parallel
with a vertically polarized random wire.



--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek