[amsat-bb] DopplerPSK - No 1 kHz-autotracking radio

Nicholas Mahr KE8AKW nicholasmahr1 at gmail.com
Thu Jun 13 21:05:47 UTC 2019

Yes what Tom and Scott said is what I do and is the correct way of working
NO-84. You cannot just tune the 10m uplink like you would a linear
transponder with SatPc32. It will make the PSK31 signal on the transponder
undecodeable. The only real way to work it is with Doppler PSK. My setup
consists of a FT-847 on the 70cm downlink, with SatPC32 correcting the
doppler on the downlink which by the way I have no issues with. Then I have
my FT-950 doing the uplinking on 10m (I use the FT-847 for VHF/UHF/Sat Only
and FT-950 for HF only). I use a homebrew dipole that is actually for
40/80m but it tunes up on 10 meters just fine and works well for the uplink
on NO-84. I then use FLdigi to decode the PSK31 signals as FLDigi allows
multi-decoding for PSK31 which allows me to decode multiple signals in the
passband at once. And of course I use DopplerPSK for the generation and
correction of the PSK31 signal. Hope this helps. Unfortunately there is not
a lot of activity on the PSK31 transponder but I hope that changes with the
upcoming launch with Psat-2.

- Nick KE8AKW

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