"Jim Lux" wrote in message
...
I doubt there's anything special about the 22 ft. As many have pointed
out, it's a deliberately unbalanced antenna which radiates from both
vertical and horizontal parts (and influenced by the towers, trees, and
buildings nearby), with a nice choke at some point to keep RF from coming
back in the shack on the outside of the coax.
...
If the choke is effective in removing the common mode current, then the
feedline will not radiate very much.

73,
Bob AD3K