[Elecraft] K3 Receiver mush

W0MU Mike Fatchett w0mu at w0mu.com
Fri Feb 24 22:55:18 EST 2017


I generally run AGC off and the rf gain is never fully open.  I will 
continue to play with settings.

My settings were fairly close but I will try these.

Thanks for the guide!

W0MU


On 2/24/2017 12:54 PM, Jim Brown wrote:
> On Thu,2/23/2017 6:32 PM, Bob Wilson, N6TV wrote:
>> For reference, here are my preferred AGC and other settings for 
>> contesting with a K3 and large CW pileups.
>
> Bob's a great op, so I really appreciate seeing his settings. But 
> they're all run together in his email with no paragraphs or 
> punctuation, so it's very hard to read. I copied his settings into a 
> word processor and added paragraphs.
>
> 73, Jim K9YC
>
> -   -   -  -   -   -   -
>
> First, set *CONFIG:TECH MD ON* to un-hide some AGC settings.Set 
> CONFIG:TECH MD OFF when finished, to eliminate distracting values from 
> accidentally appearing in the SubRx display (PLL1, AFV, dBV, etc.)
>
> *AF GAIN LO* -- Cuts audio hiss.May not work with all headphones.OK on 
> Heil.
>
> *AF LIM 20* -- Only takes effect when AGC is OFF (rarely used)
>
> *AGC DCY Soft* -- Reduces AGC-induced IMD, recommended for pileups
>
> *AGC HLD 0.05* -- Slow AGC hold time (50 ms).Reduces AGC-induced IMD, 
> recommended for pileups.Works with AGC-S only, no affect when using 
> AGC-F.
>
> *AGC PLS NOR* -- Loud static pulses do not pump AGC
>
> *AGC SLP 010*-- A pretty "flat" AGC response curve.I may move this 
> lower since pileups of loud guys can blend together, but I like this 
> setting because it saves my ears.
>
> *AGC THR 010* -- AGC kicks in at about S-8.Signals lower than THR 
> behave as they would with AGC OFF ( +1 dB of RF = +1 dB of audio)
>
> *AGC -F 120* -- Factory default fast AGC decay rate (recovery 
> time).Higher = faster.Faster can be bad.
>
> *AGC –S 20*-- Factory default slow AGC decay rate (recovery 
> time).Higher = faster.Faster can be bad.
>
> *RF GAIN at 3 O'Clock or less* except when all signals and band noise 
> are very low (e.g. 10m)
>
> *AF GAIN* never higher than 3 O'Clock
>
> *AFX OFF*
>
> *NR OFF*
>
> *NB OFF*
>
> *RIT OFF*
>
> *XIT OFF*
>
>
> FL1 to FL5 BW set to match labeled filter bandwidth exactly, not wider 
> or narrower.
>
> Use *AGC-F* or *AGC-S* for CW, whatever works best for you.
>
> Use *AGC-S* for SSB.
>
> CW Pitch 500 (or to taste), IF shift centered (on CW)
>
> 500 Hz InRad 8-pole filter on CW
>
> 2.8 kHz 8-pole filter on SSB (1.8 8-pole when bands crowded, *must 
> move IF SHIFT lower for pleasing audio*)
>
> Use *XFIL* button to toggle between filters and reset the IF shift, 
> rather than NOR (hold) button
>
> *PREamp ON* for 15m and up, *PREamp OFF* for all other bands
>
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