[Elecraft] KX2, KX3, and supply voltage vs. power output

[Jim Brown]

On Tue,5/24/2016 8:23 AM, Wayne Burdick wrote:
> In CW mode, there's no issue with doing this, since it's just an unmodulated carrier.

Not true, Wayne. CW is 100% modulation of a carrier by a square wave, 
the square wave includes harmonics, which produce IMD. THAT'S what 
clicks are. You should know that -- your spectacularly good waveshaping 
of the keying waveform in your radios is a major reason why they're so 
clean on CW!  But they DO get wider when supply voltage drops, and as 
power output increases, BECAUSE IMD increases.

> In voice and data modes, we strongly recommend using higher voltages at full power output. This will result in much better suppression of IMD products (unwanted higher-order sidebands).

Yes.

73, Jim K9YC