[Elecraft] APF

[Brian Hunt]

Thanks, Don. My choice of 700-1000 Hz is more for the NR than for the APF. The idea is to get the noise going into the NR routine  as uncorrelated as practical. The knee of that curve seems to be around 700 Hz. Any lower and the NR doesn't work as well. It's a bit subjective.  Also using the "mix" mode of the NR is key because it gives the APF some "pure" signal to work on. 

73,
Brian, K0DTJ