Hi Adrian, You may be interested in this OOT by drmpeg: https://github.com/drmpeg/gr-cessb
Based on this paper: http://www.arrl.org/files/file/QEX_Next_Issue/2014/Nov-Dec_2014/Hershberger_QEX_11_14.pdf >From the paper: "Generate SSB without the big overshoot peaks that make ALC necessary with conventional SSB modulators. " I'm not sure if this will help at all with FT8, but might be worth exploring. Regards, Nate Temple On Mon, Jan 13, 2020 at 9:59 AM Adrian Musceac <kanto...@gmail.com> wrote: > Hi Marcus, > > I'm not a hardware guy, but I think it's a circuit that monitors voltage > from the final amplification stage and adjusts gain of previous stages if > the maximum level is exceeded. Present in all classic SSB transceivers. > Perhaps somebody else can explain better. > > Adrian > > On January 13, 2020 5:09:12 PM UTC, "Müller, Marcus (CEL)" < > muel...@kit.edu> wrote: >> >> Hey Adrian, that's nice! >> >> Generally: you said you couldn't implement an ALC: what's an ALC? >> >> Best regards, >> Marcus >> >> Mon, 2020-01-13 at 16:40 +0000, Adrian Musceac wrote: >> >>> Hi, >>> >>> I wrote a report about combining WSJTX and GNU radio with a PlutoSDR >>> transceiver to achieve FT8 contacts on the 144 MHz amateur radio band. The >>> short summary is that I achieved contacts at over 800 km and heard stations >>> as far as 1000 km last month in excellent tropo propagation conditions with >>> 20 Watts of output power. >>> I thought you might be interested in reading this, but it's too long to >>> paste here. >>> >>> The report can be read here: >>> http://qradiolink.org/ft8-plutosdr-2meters.html >>> >>> Adrian YO8RZZ >>> >>
