[Elecraft] Why predistortion ?

[Jim Brown]

On 9/13/2020 3:03 PM, Wayne Burdick wrote:
> Virtually all class-AB-biased amplifier stages have worst-case 3rd-order IMD in the range of -30 dBc (ARRL method) on some HF bands. This reflects a limitation in the state of the art.

I hope that this feature will be implemented for CW as well. CW is 100% 
AM of a carrier by rectangular pulses, so any distortion in the transmit 
chain results in clicks. Elecraft pioneered very clean keying waveforms; 
it would be unfortunate for that to be lost with IMD in the power stages.

73, Jim K9YC