"S C" wrote in message ...

Finally, I would be grateful if anyone could provide me with smoe advice
in
relation to CW. E.g. Methods available to improve the transmission and
understanding CW messages.

This depends on operator sending and receiving ability. But also important
is quality of transmitted note, absence of clicks, slow speed if signals are
weak, repetition of important information if signals are weak, use of IF and
audio bandpass and notch filters.

73, Peter