Heterodyne,

The Par EF-SWL Antenna uses 45 Foot "Flex Weave" Antenna Wire
as the Wire Antenna Element (Radiator).
PAR-EF-SWL= http://www.parelectronics.com/swl_end.htm
http://www.universal-radio.com/catalog/sw_ant/2205.html
http://www.grove-ent.com/ANT8.html

about: "Flex Weave" Antenna Wire
http://www.davisrf.com/ham1/flexweve.htm
Note - Flex Weave #14 Polyethylene Black Jacketed has
168 Copper Strands of #36 AWG Copper Wire.

Ultra-Flexible 14 Gauge Stranded Copper Antenna Wire
http://www.universal-radio.com/catalog/cable/4608.html

something to consider for your limited space antenna - iane ~ RHF