[Elecraft] [K3] Harmonic Distortion

Jim Brown jim at audiosystemsgroup.com
Tue Sep 2 16:15:44 EDT 2008


On Tue, 2 Sep 2008 11:36:19 -0700, Mike Scott wrote:

>I know that LIN OUT and AGC settings might interplay, 

Yes. 

>so for what it is
>worth I run LIN OUT gain at 3, AGC SLP = 10, AGC THR = 6. Other parameters
>are default.

I haven't studied what the ideal settings are, but I would follow Lyle's 
guidelines for strong signal conditions. 

>My sound card gain is now set to maximum. I believe it would be a lot
>happier if there was more drive. I think maximum soundcard gain with low
>signal drive makes what ever noise pickup that exists on my cables more
>obvious as I have a lot of spikes (60-hz multiples) showing outside the
>filter pass band just 18 dB below the general tops of the in-band noise
>spectrum.

See my Power Point on how to kill this noise by bonding together the 
chassis of the computer to the chassis of the rig. It's easy, cheap, and 
very effective. 

http://audiosystemsgroup.com/HamInterfacing.pdf

and the same stuff as text in 

http://audiosystemsgroup.com/RFI-Ham.pdf  

73,

Jim K9YC




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