Wow, this is very good Frank. I can't count the number of times I've been trying to dig out a weak stn and jokingly made the statement "If I only had ONE dB more of signal from the station"! What's proven here is I really wasn't joking!!!
Good info. Thanks for sharing the link to AB7E's info. 73 Joel W5ZN > > The weak signal CW recordings on AB7E's website are well worth > a few minutes to listen to. His recordings clearly demonstrate > -- much more convincingly than any other demo I've ever heard-- > the significance of one dB of improved signal strength and the cost > of sending too fast under weak signal conditions > > > http://www.ab7e.com/weak_signal/mdd.html > > > > > My takeaways from his recordings: > > > - its well worth the effort to improve your signal by as little > as one dB > > > - when signals are very weak, sending faster (especially > at speeds faster then than 30 WPM) costs the equivalent of > many dB of reduced signal strength. > > > If you haven't already clicked on AB7E's webpage, these are > direct links to several of his recordings. > > > A weak CW signal buried in noise with the signal strength > decremented in one dB steps, > > > http://www.ab7e.com/weak_signal/6_5_4_3_2_1_0_db.mp3 > > > > > Two weak CW signals buried in noise -- slightly offset in > frequency -- with one signal one dB stronger than the other: > > > http://www.ab7e.com/weak_signal/A_vs_B_1db_v1.mp3 > http://www.ab7e.com/weak_signal/A_vs_B_1db_v2.mp3 > > > > > > Two weak CW signals buried in noise -- slightly offset in > frequency -- with one signal two dB stronger than the other: > > > http://www.ab7e.com/weak_signal/A_vs_B_2db_v1.mp3 > http://www.ab7e.com/weak_signal/A_vs_B_2db_v2.mp3 > > > > > CW signals sent at 20, 25, 30 and 35 WPM when buried in noise. > > http://www.ab7e.com/weak_signal/A_vs_B_2db_v2.mp3 > > > > 73 > Frank > W3LPL > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > www.w5zn.org _________________ Topband Reflector Archives - http://www.contesting.com/_topband
