Hi Nate, thanks very much for the link, I will study the module as it might be just what I was looking for. FT8 is fortunately FSK over SSB, but for general SSB work this would be essential.
Thanks, Adrian On January 13, 2020 6:06:17 PM UTC, Nate Temple <nate.tem...@ettus.com> wrote: >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 >>>> >>>
