SIMC 
     
                  (*  SIM MODES CLUB  *)
                                   IDEA BY NIZAR 3V8MN + SUPPORT BY ON2VHF
 
 
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SIM31 & SIM63
Ham Radio HF digital modes

 SIM31  “Structured  Integrated  Message"  is a new robust digimode  specially designed for making reliable & confirmed QSOs under extreme  conditions on all amateur bands.
It is interesting to note that even when a band  appears to be closed, there is well chances for an open  SIM31 path.  and if you want   to force the contact by your  full permissible hight  Tx-power or by the strenght of your  magic directive antenna , Especially during weak propagation, SIM31 could  be  the   preferred  mode  to help you Dxing. Even weak received signals, with additional local noises, that are  -18dB S/N  can  be  decoded with relative  ease.
All  received    callsigns   and  S/N  reports  are  spotted  automatically to the  PSKReporter.info
 map  service  and  to  the  HamSpots.net/SIM  web pages. So you can  see on world  mape where  are you well  received and  at what signal  report.  
 
Thanks to  *** DANY SURQUIN ON4NB ***  LAURENT ON2VHF *** BERNARD ON2TSF ***  MICHEL ON7TV ***  DIDIER ON5DVO ***  VICTOR RV3YR  ***  JOAQUIM CT4KO  *** VITALY RN9AZ  ***  MICHEL F1ABL *** 
PETER KG6VQH ***  IRV W4IWK ***  PACO EA5GVJ *** & CHRISTIAN F6ECI .