On Mon,7/27/2015 10:43 AM, Edward R Cole wrote: > CW, JT65, FSK all do fine with class-C, of course. Ed, I suggest that you drive a Class C amp with a K3 transmitting CW and look at the spectra with a P3 both at the output of the rig and at the output of the amp. Set the P3 display for 5 kHz. 73, Jim K9YC