Cortland Richmond wrote: > Sound card users' preference for bandwidth wide enough to receive fifty or > more signals is what makes us vulnerable. W1AW does NOT wipe out the "80m > psk31 sub-band;" its CW signal occupies perhaps 50-100 Hz. Use a narrow > filter, and a front-end able to handle nearby strong signals, and the > problem goes away. Use PBT,even and put W1AW off the filter skirts.
Here in southern New Hampshire, W1AW is S9+40. Typical psk31 signals are anywhere between S2 and S8 here. To get W1AW suppressed by >50dB means moving the filter far enough away that only a small part of the psk sub band remains. -- All rights reversed.
