I don't recall where this table of Relative Sensitivity of Communication Modes came from but for what's it worth::
Mode Signal to Noise Ratio Threshold WSPR -27 dB JT65 -24 dB FT8 -20 dB Olivia -17 dB PSK31 -7 dB CW -1 dB RTTY +5 dB SSB +10 dB *Allan Zadiraka* *AB8OU* 4110 State Rd Akron, OH 44319 Work: 234-738-4578 Cell: 330.760.4569 Home: 330.644.1839 On Fri, Jul 20, 2018 at 1:03 PM George Pasek <[email protected]> wrote: > I have used WSPR through the past years and have always been amazed at how > far one can go on so little power. I have always wondered how does it’s > Signal to Noise Ratio figures I’m getting from the reporting stations mean > in relation to being heard using CW. In other words, how close to a SNR of > 0 do I have to be to say that if I were on CW they would hear me and not > need a computer? I take it that anything on the + side of zero would make > it, but when watching the waterfall and listening to my receive audio (KX3) > I can hear stations that I am reporting a SNR of –10 for example. I’m > running 500mw into a 40m EFHW inverted sloper and have received a few SNR 0 > and +1. I have attempted to look up this information but got bogged down > in the math and formulas, most of which I don’t understand. > > So would a reported SNR of –10 represent a reasonable number at which the > reporting station would hear me if I simply switched from WSPR to CW, all > other things remain the same, or is 0 the break point? > > tnx > de George > WD0AKZ > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
