On Tuesday, July 24, 2012 9:44:24 AM UTC-5, Szczepan Bialek wrote:
But is in unnormal operation. When it (corona) is seen?

The quad beam antenna was invented by Clarence Moore to solve a corona problem encountered with a Yagi-type beam at 10k' in the Andes Mountains. Here is that interesting history:

http://lists.contesting.com/_towerta.../msg00393.html

The point is that electron flow corona destroyed the Yagi-type beam but there was negligible corona using the quad beam because the standing wave voltage maximums are much lower with the quad. Yet the two antennas radiated approximately the same magnitude of RF waves. This proves that electron flow is not the mechanism associated with RF radiation. It is simple to understand once one realizes that electron flow corona results in non-coherent radiation while normal photonic RF radiation is coherent.
--
73, Cecil, w5dxp.com