[Elecraft] K3 AGC settings for weak signal CW

[Chad Wasinger]

Thanks for the explanation and plot. I will try your settings for the slope/threshold. I do run a mast-mount SP-2000 for 2 meters with the internal K144XV, works well together. I have not added a preamp on 6 meters yet.

> Date: Thu, 17 Jan 2013 16:28:55 +0000
> From: alsopb at nc.rr.com
> To: chadwasinger at outlook.com
> Subject: Re: [Elecraft] K3 AGC settings for weak signal CW
> 
> Chad,
> 
> AGC doesn't kick in till way above weak signal on any reasonable values 
> of THR and slope.  Of course a mast mounted preamp on 2M would help a 
> lot.  One can get by with a back of the rig preamp for 6M.  The stock K3 
> is deaf on 6M.  For weak CW signal DXing, I had to add 15 db of low NF 
> preamp gain.  Managed to finally finish 6M DXCC last year.
> 
> The prevailing DXer's are all over the map on where to set the threshold
> on HF bands.
> 
> I've decided to set slope/threshold to 12/12 here based upon some 
> measurements.   Attached is the curve I generated.
> 
> The threshold determines where the AGC action starts.  The slope is how 
> fast the audio rises with increasing signal above this point.
> 
> 73 de Brian/K3KO
> 
> 
> On 1/17/2013 16:15, Chad Wasinger wrote:
> > Would anyone be willing to share their preferred AGC settings for
> > receiving weak cw signals? Specifically, I'm wanting to fine tune my
> > settings for listening to "at the noise" 2 meter and 6 meter
> > beacons. Thanks!ChadN0YK
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