If what you need is an antenna.. Two simpliest are teh half wave dipole and the end fed long wire.
Now in my Movice days.. I used both. the radio had a PI_network output and could load a 1 foot piece of wire on 80 meters (That is an amazing range) So most any wire plugged into the antenna port worked.
But a proper dipole is about 125 feet as I recall (62.5 each side of the feed point) you can look up the precise length on line.. 40 meters is half that, and you can do the mate for the rest. If you have the room you can do some fantasying things with dipole type antennas.
If you like music. and a good mix of styles. go to the url WTWW.US and click on the listen live link and Transmitter 2, at least on weekends This is a SHORT WAVE station , ,,, well 5 of them actually. though I think only 4 are live. run by a family of Ham radio operators and most of the Advertisers are Ham Radio supplyers like Maine Trading company. Iv'e met some of the principles from this station at Dayton.
ON weekends also enjoy the music. Frequency (if you wish to listen via radio) Varies with time of day. Web site helps tell you when.