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
