My explanation is that the person who told you this doesn't understand
how antennas work. It's total BS.

Roy Lewallen, W7EL

W4JLE wrote:
I was discussing the construction of a screw driver antenna, and an off hand
remark was made by a fellow ham. "Wind the loading coil 8 turns per inch
for local and 10 to 11 1/2 turns per inch for DX as the angle of radiation
changes"

Can someone explain this to me?