[Elecraft] KX3 IMD vs DC input, using built-in 2 TONE

[Wes Stewart]

Can't speak to the KX3, but for a K3(S) the mic gain equalizes the two tones.

On 6/12/2016 2:53 PM, Erik Basilier wrote:
> I am testing my KX3 / KXPA100 combo, looking at TX IMD and power output
> depending on the DC power supply characteristics. I am experimenting with a
> N8XJK Boost Regulator (40A max) as well as an Astron linear supply adjusted
> down to low voltage, simulating a run-down battery.
>
>   
>
> To judge IMD I use the built-in 2 TONE, mix down sampled output to audio,
> and feed into Spectrum Lab.
>
>   
>
> When I look at the envelope, its smallest amplitude is about 1/3 of peak.
> This suggests that the 2 tones are not of equal amplitude. Has anyone else
> seen this? I downloaded the laterst firmware about a week ago.
>
>   
>
> Thanks,
>
> Erik K7TV
>