Gayle, Daytime contacts are common on 10 meters during the daytime because of what is called "Trans-equatorial Propagation". That is, signals pass across the equator. I won't go into specifics on this subject but if you will Google "Trans-equatorial Propagation", you will find detailed explanations that will answer your question.
On Tue, Mar 23, 2021 at 10:08 AM Jonathan Guthrie via BVARC <[email protected]> wrote: > Because with ionospheric propagation, the signals come back to earth in > distinct rings at specified distances from you. You can talk to people at > that distance, but not to distances closer or farther away. > > If you want to know the why of that, then my explanation gets all kinds of > hand-wavy, and not terribly convincing. There is a frequency-dependent > component and an angle-dependent component, but it's why NVIS works better > on the "low bands" than on 10m. > On 3/23/2021 10:00 AM, Gayle Dotts via BVARC wrote: > > 16 feet vs 22 feet height, as it pertains to takeoff and distance > achieved. I assume the higher the further is the rule. How come, on days > when on 10 meters (with propagation) I can contact all over South America > but can not for the life of me get North Carolina or Kentucky or Florida > during the day? > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing > [email protected]http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/[email protected]/ > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/[email protected]/ >
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