And who is going to provide satellites for the other 2/3 of the world AND the Southern Hemisphere.
Have you checked the commercial HF radio manufacturers lately and read up on the TWELP digital protocol? 73 is an electron tube/valve from the 1930s. MRFE6S9160 Alan VK2ZIW On Sun, 13 Sep 2020 13:05:43 +0200, Helmut Oeller wrote > Alan, you can outperform both, HF communications and VHF/UHF terrestrial > repeater, using advanced satellite technology like amsat project QO- > 100. We cover at least one-third of the globe just with one > satellite and lots of bandwidth even for tv. Hams should learn from > the commercials and leave their old tracks otherwise they will > become redundant. > > 73, Helmut, DC6NY > > -----Ursprüngliche Nachricht----- > Von: Al Beard [mailto:[email protected]] > Gesendet: Sonntag, 13. September 2020 07:13 > An: [email protected] > Betreff: [Freetel-codec2] TAPR FreeDV presentation by David Rowe, thanks > > Thanks David, > > I listened at 5:30AM this morning to your presentation. > > Well done. > > The ionosphere can give a HF transmitter massive coverage far > exceeding the coverage of any VHF/UHF terrestrial repeater. > > But, this does not help with medium distance two-way communications. > > OH YES IT DOES, place a REPEATER at the above transmitter site. > > With "digital voice" two problems for a repeater are solved: > > 1) Is the signal valid? . . . . . . . . . . Presence of specific > sync. 2) Does the signal want to be repeated? . . Embedded data with > the voice. > > I see this as so so important, visionary. > > --------------------------------------------------- > Alan VK2ZIW > > OpenWebMail 2.53, nothing in the cloud. > > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 --------------------------------------------------- Alan VK2ZIW OpenWebMail 2.53, nothing in the cloud. _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
