Hola Eduardo,
I have tried small coax loops by KC2TX (
http://www.qsl.net/kc2tx/lb_loop1.htm) and did not find them an improvement
over my L. Others have, though.
Then I have built the loop described by N6PE on December 2008 issue of QST.
Although not extraordinary, that seemed to hear better in my high-noise
location.
Good luck, I understand this is a really tough one!
73 Pete
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Pete Parisetti MM0TWX - HB9DSU
for music, ham radio and more
visit http://www.hb9dsu.com
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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