I got this with my pocket SW radio and it makes a huge difference:
http://www.countycomm.com/swantenna.htm It just clips onto the radio's built-in antenna. I don't know how well it compares to other options, in fact I'd be interested in what some experts think about it. But it is light and compact when stowed in its own wind-up reel.
Steve
_________________________
"After I had solaced my mind with the comfortable part of my condition, I
began to look round me, to see what kind of place I was in, and what was
next to be done"