[Elecraft] K3 cleanest signal possible

[Wayne Burdick]

Hi Kel,

The K3/100's phase noise and ALC artifacts are so low at all power levels that you shouldn't need to finesse this. I would select power level based on what you want to get out of the amp.

See W9YC's study of transmit phase noise and keying bandwidth of various transceivers:

    http://audiosystemsgroup.com/TXNoise.pdf

73,
Wayne
N6KR 


On Jan 19, 2015, at 9:10 AM, "Kjeld Holm" <kh at kh-translation.dk> wrote:

> Dear all,
> 
> I have a K3/100 and an Acom 2000A and I am wondering how to get the cleanest
> signal. The K3 is supplied with 13.8V. 
> I see several options. Adjusting the K3 to 9W thinking that the KPA100 does
> not kick in could be one method. Another one could be adjusting the K3 to
> 14W thinking that the KPA100 will be running very easily (and clean). A
> third one could be adjusting the K3 to 40W thinking that the KPA100 will be
> running in the middle of its power range (and therefore being very clean).
> I do not have the technical knowledge to decide which option is relevant. 
> Of course I know that the output from the Acom 2000A will vary very much
> according to the selected output from the K3. 
> Vy 73 de OZ1CCM "Kel"