If I'm using my 40 m dipole and go to 80 meters the signals will jump up SIGNIFICANTLY if I switch to my 80 meter antenna. Several S units. Same on 20. So, if instead of a single band 40 m dipole I had a 80/40 fan dipole, wouldn't an SDR have to deal with stronger signals in total? Same as if we were talking about a Steppir vs a trapped tribander on 10-20 meters.
Rick K2XT > To: [email protected] > From: [email protected] > Date: Wed, 16 Sep 2015 08:21:03 -0700 > Subject: Re: [Elecraft] Analog vs. Digital Front Ends > > I'm having a hard time understanding where the frequency selectivity of a > piece > of wire comes from. > > On 9/16/2015 6:13 AM, Rick Stealey wrote: > > And Joe presented a very useful tabulation showing how signals combine. > > One thing that we should keep in mind is that single band antennas like > > Steppirs, single band dipoles, etc. greatly attenuate out of band signals. > > And from Joe's data look what a difference 10-20 db can make. This might > > be a good case against 80/40 fan dipoles and trap tribanders. > > Rick K2XT > > _____________ > > ______________________________________________________________ > 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]
