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
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