Digital HF Transmission Methods vs. IMC

Just did a test with fldigi and my phone, generated a 50wpm cw message to a wav file, tested the wav file by importing to fldigi, then transfered to my phone and played next from there into the built in microphone on my laptop. Picked it up just fine. So maybe 50wpm cw bursts are doable, and doesn’t appear to use much more bandwidth. Something to add to the commo book.

danmorgan76

What follows is a belated response to a recent comment regarding Morse burst devices.

Most folks don’t realize that international Morse Code (IMC) is a very early form of binary communications; Dits and Dahs or ones and zeros.

All Amateur (Ham) license holders before 2007 and every Special Forces 18E (Communications NCO) before 2002 were required to learn IMC. Why? Because prior to Satellite communications and the advent of some of the newer software based data transmission methods now available, it was the preferred method of making reliable long haul HF Communications. IMC is more reliable by magnitudes than voice communications across the HF spectrum. It still remains, in my opinion, THE method requiring the least amount of fragile (breakable) equipment. Since the code requirements have been dropped on the civilian side, very few ham operators are willing to invest the time to learn a new language (IMC). In my…

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