On Thu, 20 Jul 2006 12:36:03 GMT, Cecil Moore
wrote:

So now amateurs and SWL's should be Morse code proficient
not only using tones but using the swishing sound made when
a BFO is not present?

If you can copy CW, you can copy CW. The tone it's coming in with
doesn't make much difference. I've copied signals so weak that they
were just changes in the quality of the noise and I've copied perfect
S9++T9 signals. They were all mostly R9. The R only changes if the
signal fades completely out or if there's interference that masks the
signal. Try that with PSK.