Did that, Brett - should have mentioned it in my last post. The tunnel effect that I'm hearing is actually less objectionable with the AFX on. Paul WW2PT Brett Howard wrote: > > Make sure and try it with AFX on and off. > > -- View this message in context: http://n2.nabble.com/K3-NR-tp3515659p3518899.html Sent from the Elecraft mailing list archive at Nabble.com.