[Elecraft] KLPA3A power transistor thermal stress concerns

[Wes Stewart]

Did they do IMD as a function of frequency?



On 10/25/2017 8:48 AM, Ignacy wrote:
> Seems a bit artificial problem, unless someone is driving an amp that
> requires 12 W. My modified Expert 1.3k-fa requires about 6W to 8 W for 1 KW
> output.
>   
> If a serious concern, increase voltage to 15V. The Yahoo KX3 group has
> graphs of IMD3 as a function of power and voltage. Increasing voltage at 12
> W by 1 V decreased IMD3 by about 10 db. I assume that the LPA in K3 is
> similar to the amp in KX3.
>
> Ignacy, NO9E
>
>