LF: DSP?

["Petr Maly" <petr.maly@hk.cro.cz>]

Hello lowfers!

We are probably damned to fight agains QRN and QRM. Recently I had 
opportunity to buy an external DSP device. I wonder what the experience 
of DSP users are. Certainly it is great to have a very narrow non-ringing filter.
I mean rather use of  noise-reduction techniques. Do they really provide
a possibility of making very weak signals (normal CW) more readable?
Or is it only a toy and I had better to rely on my well-trained ear?

Petr, OK1FIG