I recall the days in the 1970's when we had a couple of active foreign DX'ers in South Florida, it was often
the case that when we had good TA's up here, they didn't. At the time the thought was that their signal
paths were longer, and their location close to the tropics had a higher atmospheric noise level.
Russ Edmunds
WB2BJH
Blue Bell, PA
Grid FN20id
http://www.hard-core-dx.com/article.php?story=20190201201503948