[Elecraft] K3: AGC THR doesn't go low enough

[Paul Christensen]

>I had resigned myself to living with the AGC off because I can't stand
>the sound of the audio with it on in CW mode..

I have similar perceptions in CW mode and generally leave AGC turned off. 
The only problem I've encountered living in Florida is that on the 40m-20M 
bands, the 100 kHz/sec sweep from the Department of Homeland Security's 
ROTHR system nearly leaves me with permanent hearing damage.

http://tinyurl.com/2egfnjo

The sweeps occur at regular intervals, usually around 12 minutes apart from 
three ROTHR transmit facilities located in TX, VA, and PR.  With the SDR-IQ 
running, I can usually react in time to activate AGC before the sweep 
appears on my listening frequency.  However, when I'm not looking at the 
screen, the result is pretty painful.  I know that the K3 firmware was 
updated some time back to include a peak-limiter function, but it seems to 
respond after the fact.

Paul, W9AC