[Elecraft] My K3's hissy and noisy audio

[Ignacy]

AGC settings and AF gain interact. With no signal you may have lots or little audio. Also, full audio can be at 20% of 50% gain.

When looking at the spectrum of a CW signal one clearly see the third and the fifth harmonics. Not sure whether they are real or artifacts of a sound card but K3 sounds a bit harsher than K2. These harmonics were part of a thread here by hams from the UA land; it was followed by the AF mod.. I am not sure whether my radio has already this fix(# around 2200). 
Ignacy


I have very sensitive in-ear monitors.  The K3 (and the Orion, and 
possibly other radios) has significant hiss.  I inserted an attenuator 
and knocked the hiss down below my ability to detect it.  There is 
plenty of audio range remaining.

You may find 10 to 20 dB will help.
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