[Elecraft] K3 audio

Paul Fletcher paul at melreed.demon.co.uk
Mon Apr 6 18:33:24 EDT 2009


Hi Evert,

You are not alone - my K3 and another I tried experience the same symptoms. I can't work out the cause but inserting a low pass filter in the headphone output fixes the problem. I found the same as you in that increasing the AF gain makes things worse but I don't know if this is amplifier distortion or a digital artifact that is only audible when you turn the AF gain up. I know the measured performance looks acceptable but this doesn't help.

I periodically return to this issue to try and get to the bottom of it but so far no luck.

73 Paul M1PAF


It is definitely not band-noise what I'm talking about.

I've got 2 K3's and they both give me the same result.
I played with all kind of controls (RX-EQ, AGC-SLP/THR, AGC-S/F, AGC ON/OFF)
and there is no difference whatsoever!


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