First on-air test of FreeDV 2020

David Rowe VK5DGR reports on the first on-air tests of the new digital voice mode FreeDV 2020

Brad (AC0ZJ), Richard (KF5OIM) and I have been putting the pieces required for the new FreeDV 2020 mode, which uses LPCNet Neural Net speech synthesis technology developed by Jean-Marc Valin. The goal of this mode is 8kHz audio bandwidth in just 1600 Hz of RF bandwidth. FreeDV 2020 is designed for HF channels where SSB an “armchair copy” – SNRs of better than 10dB and slow fading.

Mark, VK5QI has made a 3200km FreeDV transmission from Adelaide, South Australia to a KiwiSDR in the Bay of Islands, New Zealand. He decoded it with the partially working OSX version (we do most of our development on Ubuntu Linux).

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IARU Region 1 VHF/UHF/Microwave Newsletter

The new IARU Region 1 VHF/UHF/Microwave newsletter is now available, it contains a report on the key Vienna meeting of 27-28 April 2019.

There is also a report on the important Pohotovostní Test on 50 MHz that will take place on June 13, radio amateurs worldwide are encouraged to participate.

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ARRL Field Day Site Locator is Live

ARRL Field Day will take place on 22nd and 23rd June 2019.

The Field Day site locator is now up and running, and so far more than 430 sites already are in the database. To find a Field Day site near you, enter your town and state in the “Location or Call Sign” box at the upper left. Listings also are available by state or Canadian province.

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