Marvin, Good evening. I believe that it would depend on the type of antenna that the transmitting and receiving stations are using.
One option would be Near Vertical Incidence Skywave (NVIS) for which horizontal dipole antennas mounted < 30ft above ground may work. Another option would be using vertical antennas with a low takeoff angle which would use ground wave. I have had good results with the latter on 40m and 15m. I suppose that a third option may be to use Yagi-Uda antennas with driven elements, reflectors, and directors, though for frequencies like the ones above they’d be dimensionally large. The good thing is that their radiation patters would be well focused and directional so as to make them applicable to NVIS or Ground Wave radio propagation modes, depending on where it’s “aimed”. Best of luck. 73, Stephen (W2WF) https://en.wikipedia.org/wiki/Ground_wave https://en.wikipedia.org/wiki/Near_vertical_incidence_skywave > On Sep 28, 2025, at 8:08 PM, Joseph Benoit via BVARC <[email protected]> wrote: > > Could play with nvis but 10 meter groundwave (vertical antenna) most > practical. > > On Sun, Sep 28, 2025, 8:04 PM Suggs, Marvin (KTRK-TV) via BVARC > <[email protected] <mailto:[email protected]>> wrote: >> What HF band would be conducive with 2 base stations 30 miles apart wishing >> to communicate? >> Thanks >> Marvin >> N5RKW >> Sent from my iPhone >> ________________________________________________ >> Brazos Valley Amateur Radio Club >> >> BVARC mailing list >> [email protected] <mailto:[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]/
________________________________________________ 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]/
