Great post, Lou.? Very helpful.? I'm going to try your values and see how well they work for me.? I tend to use a bit tighter H- and L-cut values.? For NR, did you mean NB?? That's the one that helps fix ignition, pulse type noises.? I use the NR and push it pretty high for CW.? It works for me to reduce the "SHHHHHH" noise these radios have in the audio.