73 Khz QRG.

 

Two   New mode's  have been added  to the  Opera  range

OP16 and OP65 ,

 

OP65 (minutes)  is specifically  for the 73Khz band

.

The  decoding  engine  utilises a   'Automatic frequency lock algorithm'

As a  result of this  , ' Extreme stability'  oscillators for  Tx or  Rx  are not necessary 

 

All other  features  remain  un changed

 

The OP65  mode  has a decode threshold  of   6 dB lower than  the

OP16  and  WSPR15  systems , but  still  retains  the  ability

to  average  along the  time  line , qsb times  on the  band

are  seen to  be much longer than  those on 136 KHz

where  OP32 is   established

 

Thanks, also, to  Philip  , the  PSK Map  , has a  complimentary

4000m / 73KHz  band  added  to the  qrg  list