For a little background, my old tower is coming down soon due to deterioration. (one leg at about 35 feet has rusted through..yikes! ) So in the process of setting up some new antennas NOT on the tower, I did an experiment. I shunt fed a grounded pole. My rationale, was since my 65ft tower had been shunt fed for 160 and 80 with good results, I could do the same for a shorter version and maybe get 40 or 20, and maybe 15. I used a 20 foot chain link top rail stuck in the ground, with a (approx 2 foot) arm at the top perpendicular to the pole, attached a copper wire to it, dropped it to the bottom, with a fiberglass spreader about halfway to keep the spacing. The feed point was an air variable in line on the center conductor of the coax, and shield to ground. Surprisingly it tuned to 160? (huh? WTH?) wouldn't touch 80, or 40, seemed to like 10mhz. Decided to add more ground radials (old grounding was sketchy) which made tune 80 ok but not 40, or any other band. As a radiator on 160, 80...not so good. Tried to make a Texas traffic net on a hundred watts, they could hear only an unintelligible weak signal., lots of RF in the shack. I guess 20 feet is not a good length to cheat with on 160, 80. Live and learn I guess. Any thoughts?