[Elecraft] K3 Receiver mush

[Ed Muns]

I concur with most, but not all, of N6TV's recommendations below.  If we all
agreed on all the CONFIG parameters they wouldn't need to be variable!

One that I particularly disagree with is how to narrow the IF bandwidth in
SSB mode.  The recommendation to narrow the bandwidth and then lower the IF
Shift is unnecessarily cumbersome on SSB.  After going through these
gyrations, you'll find that the LO CUT is where it was before you started.
So, all that needs to be done to narrow the SSB IF bandwidth is simply
decrease HI CUT.  One quick, easy operation and the audio is entirely
intelligible throughout the adjustment.

Ed W0YK
_______________________________________________________________________ 

-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Jim
Brown
Sent: 24 February, 2017 10:54
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 Receiver mush

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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