[Elecraft] [K3] Harmonic Distortion

[Mike Scott]

>Taking all of this into account, I run my LIN OUT gain at 3, and 
recommend that setting.

Jim B., I also confirm your analysis with my serial number 508 K3. I don't
have your equipment but I was able to see the effects that your well-done
reports show. The freeware signal analysis software Spectrum Lab is quite
good enough to see the effects and that led me to exact same conclusion,
above a gain of 3 the Line Out distortion effects become quite noticeable.

I know that LIN OUT and AGC settings might interplay, so for what it is
worth I run LIN OUT gain at 3, AGC SLP = 10, AGC THR = 6. Other parameters
are default.

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.

Mike Scott - AE6WA
Tarzana, CA (DM04 / near LA)
K3-100 #508/ KX1  #1311