Radio Amateurs can do much to heat up the ionosphere and improve DX conditions, the South African Radio League was told by a prominent space weather researcher.

"By many radio amateurs transmitting at the same time, the resultant RF hitting the ionosphere will cause it to ionise and become active like during the high sunspot years", he said.

He made the point that during major DX contests, the 10 metre band opens up while the day before and the day immediately after the contest the band is dead. This conclusively proves my point that high RF levels impacting on the ionosphere does the trick.