IMHO, For rates above 1200 bits/s, transmission via Class C transmitters should be optimised. The M17 project (1600 and 3200) IMHO waists extra range when in the 1600 mode simply pads out the data packets to use the same modem as the 3200 mode.
Meanwhile back here on HF, Australia, we have very few hams using Codec2 and, our emergency comms group (WICEN) shows no interest in semi-secure voice comms over HF and, being limited by the number of interested hams, it's hard to demonstrate it's usefulness. I await some comments from our NSW country ambulances on their TWELP (r) HF digital voice system implemented in the last two years. 100+ radios deployed. Alan VK2ZIW On Sat, 15 Jan 2022 15:04:02 +1030, david wrote > On this GitHub discussion: > > https://github.com/drowe67/codec2/discussions/283 > > we are talking about improving codec2 at bit rates above 1200 bits/s, > an topic I haven't looked at for many years. > > I'm hoping to get contributions from other developers, so am starting > out with some tutorial examples of how codec2 works using the c2sim > simulation tool. > > - David > > On Wed, 2022-01-12 at 08:54 +0100, Ugo Poddine wrote: > > Hi Alan, > > > > Can you explain to me at what time the Id is triggered to be sent > > from your parrot (e.g. 15, 30, 45, 00 min) and if the Id is sent in > > FreeDV or in CW ? > > I have tried to link it at the moment without success, but perhaps at > > least trying to listen will help. > > > > Thank-you, 73 > > Ugo > > Il giorno 9 gen 2022, alle ore 07:04, Al Beard < > > bear...@unixservice.com.au> ha scritto: > > > Hi Ugo, > > > > > > I run a "freebeacon" here and when triggered, will transmit back to > > > you or ident > > > every 15mins on Mode 700E on 7177 KHz LSB as it's the only 40m > > > frequency mentioned on QSO.freedv.org. > > > > > > That is what you need over there in Europe. > > > > > > Yes it ties up one transceiver here and one antenna but it puts a > > > signal out 24x7. > > > > > > Being in a suburban backyard, suffers from horrendous interference, > > > in particular the HFC cable phone system. > > > > > > Alan VK2ZIW > > > > > > > > > On Sun, 09 Jan 2022 06:49:02 +0100, Ugo Poddine wrote > > > > Hello Ian, > > > > > > > > I agree with you that it's not so easy to find free-dv guys to > > > speak with at whatever time of the day and frequency, mainly in > > > Europe, where we are surly a small group. > > > > > > > > But I know that daily QSO takes place between VK, ZL and > > > Argentina in 20m, and also between UK and Germany, in 40m. > > > > > > > > Of course, it's not yet SSB, sometime you need to take some > > > rendez-vous before... > > > > > > > > I think that the big effort that David and the other developers > > > are doing surely need HAMs community help, if not with our > > > programming capabilities (unfortunately the matter is really hard), > > > at least with our effort in using and testing. > > > > > > > > I'm not offering myself for having a FreeDV contact with you > > > because my barefoot set-up (100W and a wire style), in the current > > > propagation conditions, make me able to connect VK in a realiable > > > way only by digital chat protocols (e.g. Olivia). > > > > > > > > My best 73s > > > > > > > > IU1IPB Ugo > > > > Il giorno 8 gen 2022, alle ore 10:51, "ian.lyckholm--- via > > > Freetel-codec2" <freetel-codec2@lists.sourceforge.net> ha scritto: > > > > > I've been trying for some time to find someone using the above > > > > mode on several of the listed frequencies. I have also listed on > > > > the free-dv qso finder. > > > > > No response anywhere. > > > > > How many people are actually using this mode? > > > > > Just thought I'd ask before abandoning the project. > > > > > Cheers > > > > > Ian Lyckholm VK5MA > > > > > > > > > > > > > > > > > > > > > > Freetel-codec2 mailing list > > > > > > > > > > > > > Freetel-codec2@lists.sourceforge.net > > > > > > > > > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > > > > > > > > > > > > > > > > > > > > > > > > --------------------------------------------------- > > > Alan VK2ZIW > > > Before the Big Bang, God, Sela. > > > OpenWebMail 2.53, nothing in the cloud. > > > > > > > > > Freetel-codec2 mailing list > > > Freetel-codec2@lists.sourceforge.net > > > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > > > _______________________________________________ > > Freetel-codec2 mailing list > > Freetel-codec2@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > _______________________________________________ > Freetel-codec2 mailing list > Freetel-codec2@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 --------------------------------------------------- Alan VK2ZIW Before the Big Bang, God, Sela. OpenWebMail 2.53, nothing in the cloud. _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2
