On 6/9/2018 2:21 PM, K9MA wrote: > While I'm primarily a CW operator, I'd be very reluctant to use the > amplifier on SSB. CW is 100% Amplitude Modulation of a carrier by a rectangular wave, so the transitions are rich in harmonics that are heard as clicks, and they WILL excite IM in a non-linear path. 73, Jim K9YC