Hi Ken, > The 2 dB number is bogus, in my opinion/experience. At least for me the 2dB recommendation for the 400Hz hit the nail right on the head. But on the other hand, I am not much of CW man. vy 73 de toby -- DD5FZ (ex 4n6fz, dj7mgq, dg5mgq, dd5fz) K2 #885, K2/100 #3248, K3 #67