On my Hermes Lite 2 + Hardrock-50, the latter was claiming 40 watts on 700E without touching any settings in the app. Will need to play more to see how far it can be taken.
-Mooneer K6AQ On Sat, Dec 19, 2020 at 7:22 PM David Rowe <[email protected]> wrote: > Thanks Walter and Mooneer. I'd be interested to know the RMS power you > can develop with 700D/E with the clipper option. > > - David > On 20/12/20 10:30 am, Mooneer Salem wrote: > > Looks like it's working reasonably well, though the 20 meter band fell out > shortly after we all got it installed. More testing tomorrow for sure. :) > > -Mooneer K6AQ > > On Sat, Dec 19, 2020 at 2:26 PM <[email protected]> wrote: > >> Have it loaded and running now. >> >> Working on a couple others as I type to get some end to end testing. >> >> Many thanks David, and best of the holidays. >> >> >> Walter/K5WH >> >> -----Original Message----- >> From: David Rowe <[email protected]> >> Sent: Saturday, December 19, 2020 3:34 PM >> To: [email protected] >> Subject: [Freetel-codec2] FreeDV 1.5 - 700E and OFDM compression >> >> I've been working on a new FreeDV 700E mode, and some compression for >> FreeDV 700D and 700E to increase the average power. A Christmas present >> for you to play with >> >> 700E is designed to handle fast fading like 700C, but like 700D has >> powerful FEC. My bench tests indicate 700C & E are equivalent on moderate >> fading channels (2Hz dopdler/2ms spread), but on very fast fading (4Hz/4ms) >> 700E does better - 700C & D fall over. 700D works better at lower SNRs on >> slow fading channels. >> >> I've also been testing against compressed SSB, which as Helmut suggests >> is pretty hard to beat, as it's so robust to fading. However 700E is >> hanging on quite well with fast fading, and becomes noise free as the SNR >> increases. >> >> -/- >> >> The second innovation is compression of the 700C/D/E waveforms, to >> increase average power significantly. >> >> Please be careful adjusting the Tx drive and especially enabling the Tool >> - Options - Clipping. It can drive your PA quite hard. I have managed 40W >> RMS out of my 75W PEP transmitter. Make sure your transmitter can handle >> long periods of high average power. My IC7200 and >> FT-817 seem OK. >> >> At the same equivalent peak power - 700D is doing well when compressed >> SSB is -5dB SNR and rather hard on the ears. >> >> -/- >> >> Peter VK3RV, Jose LU5DKI, and Barry VK3BRT tried 1.5.0 last night and >> report it works on real HF channels. >> The latest manual describes the new features: >> >> >> https://github.com/drowe67/freedv-gui/blob/118cb66ee4679518185db871ec0ae68071c406a4/USER_MANUAL.md >> >> >> You can download Windows 32 and 64 bit versions of FreeDV 1.5 here: >> >> http://rowetel.com/downloads/freedv >> >> -/- >> >> I'd be interested in any feedback. If you have an interesting test case >> (e.g. a bug or comparing SSB to FreeDV), pls send me off air recordings of >> signals (FreeDV Tools-Record File from Radio). That helps me make objective >> comparisons. Recordings are much more useful to me than anecdotes or >> subjective reports. >> >> Thanks, >> David >> >> >> _______________________________________________ >> 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 >> > > > _______________________________________________ > Freetel-codec2 mailing > [email protected]https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 >
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