Random wire antenna
An antenna with a length of 17.6m or 58ft (not so random). Works fine on all bands from 40m - 10m. I use it with an old Mind Fucking Junk 971 tuner and 8 radials of ~6m long and put it up as a sloper from my 12m spiderbeam pole when I go bike portable to my favorite /p spot. See https://udel.edu/~mm/ham/randomWire/ and http://www.hamuniverse.com/randomwireantennalengths.html for antenna lengths that work. The trick with this antenna is to stay away from halfwave length on the bands you want to use it for so that it can be tuned with a reasonably simple tuner.