Sorry Rik,

 

Tnx for calling

 

I think  , slowly over the  years  (yes that long) the  noise  level on MF at my qth  has  risen to  the point , that  Rx on  500  is virtually  useless ,  my  s/n  levels  on decode  are  now  usually   10dB  worse  than  , Gary  , g4wgt , he  is about  25  miles to  my  east  inland, but  in tests  last  year  with  John up in the  Shetlands, decodes  with  only  watts  to  my  Ae  where possible ..so the  actual  'system'  is  working ......may  be  its  a  case of  too  much  gain/Q .....  perhaps  one of the  'mini'  type  of  systems  will  solve the  problem.

 

Glad  the Op qso  system is  working , at  -20 dB  lower limit , its  not  as low  as the  ROS-MF  2  system, but , its  real CW  with  on/off keying, and  can  withstand   45/50 %  random  data loss, which is  I think  unique in a  data  mode?, you  can  copy the  last 50% and  still  decode. with  ros-mf  you need  to  catch  the  lock  frame  and  others , interleaves of  60  seconds would  require  very long  tx  periods ?

 

After all   it was  100  years  after the introduction of hardware  based   real CW data   before  Mr Morse came  along with his coding system ... : )

 

73 -G..

Graham,

 

I copied your Opera CQ call very well (abt 0dB SNR) and replied several times, but no succes.

I was running 20W (abt 50mW ERP).

 

73, Rik  ON7YD - OR7T