Hi Rick, I would also think that peak radiation angle of the RX antenna versus the arrival angle of the desired signal is also a big variable that would not allow the relationship you heard on the webinar to be true under all conditions. As you said it probably is too much of a generalized statement, and needs some very specific conditions to be true.
I know with my RX antennas the improvement in signal to noise compared with my TX vertical is very dependent on arrival angle (as an example). P.S I did not hear the webinar. 73, Don (wd8dsb) On Friday, March 4, 2016, Richard (Rick) Karlquist <rich...@karlquist.com <javascript:_e(%7B%7D,'cvml','rich...@karlquist.com');>> wrote: > In this webinar, it was asserted (without explanation) that > for every 1 dB increase in RDF, you get 1.5 to 2.0 dB > improvement in S/N ratio. I've never heard that before > and don't even see how it makes sense. Actually, I don't > even know how you can make generalizations like that > unless you are describing a theoretical QTH with uniform > isotropic noise. I'd like to believe this is true. > Can someone educate me as to why I should believe this? > > Rick N6RK > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > _________________ Topband Reflector Archives - http://www.contesting.com/_topband