If you are still using a random wire or dipole strung up in the attic or
roof top I would seriously consider "rearranging" your SWL antenna into a
large horizontal loop.

Notes on All-Band Use of Horizontal-Plane Loops (10-28-1997)
http://www.cebik.com/wire/hl.html

Horizontally Oriented, Horizontally Polarized Large Wire Loop Antennas
(03-29-1999)
http://www.cebik.com/fdim/atl1.html

Horizontal Loops: How Big? How High? What Shape? (10-21-2004)
http://www.cebik.com/wire/horloop.html