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

[Wayne Burdick]

On May 24, 2016, at 9:37 AM, Jim Brown <jim at audiosystemsgroup.com> wrote:

> 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.

Hi Jim :)

As usually, you're theoretically correct. However, the KX2 and KX3 have such clean keying envelope shaping that when they're running 10 watts at 10 volts they're still going to be cleaner than everything else on the air (except a K3/K3S).

Wayne