The three foot ribbon cable loop assembled, propped up by a child's rocking chair - it is not self supporting. This is a very "hot" design - excellent "Q" and excellent sensitivity.
http://www.mindspring.com/~loop_antenna/ribbonloop.htm
This is a complex construction project (but not too bad). You need to be careful to do each step carefully. There will be some degree of customization and judgement involved.
http://www.mindspring.com/~loop_antenna/umbrellaloop.htm
The portable loop in use, the portable radio is simply placed into the centre of the loop and the signals collected are inductively coupled to the internal ferrite rod antenna of the radio.
http://dspace.dial.pipex.com/town/pipexdsl/r/arar93/mds975/Content/aerials1.html
The large loop allows many distant stations to be heard on even a modest receiver.
http://www.mindspring.com/~loop_antenna/amloop4.htm
The loop tuned almost the full AM band. It topped out, however, at 1650 kHz. There was some benefit, however on a weak station on 1680 kHz.
http://www.mindspring.com/~loop_antenna/amloop2.htm
and cover the entire AM band.
http://www.hard-core-dx.com/nordicdx/antenna/loop/loop1.html
can be one of the most remarkable and fun ways to improve your MW/AM reception on almost any radio
http://www.hard-core-dx.com/nordicdx/antenna/loop/homeloop.html
ARRL says that one should use sheilded cable for a loop antenna with the sheild attached to ground and the core being used for the signal.
http://www.hard-core-dx.com/nordicdx/antenna/loop/loop4.html