g3kev wrote:

Keep it  SIMPLE all that is required is a good cw operator at each end with well
filtered, selective symmetrical EARS able to read morse through qrn and qrm and 
a
steady hand for sending.
[snip]

Are you able to decode CW which is 15 dB *below* the noise ?
CW that is not at all perceptible even with the most selective ears ?
If so, all my congratulations, you are the only that can do that.

In case you have missed it, all this *digital stuff* is meant to
make possible reception of CW where the ears can not even
tell that a CW signal is present. And this is the case with 137 kHz.

73,
Alberto    I2PHD

P.S. Have you perhaps forgotten a smiling emoticon :-) at the end
of your message ?