[Elecraft] R: Re: K3S - K3 Noise Blanker and Noise Reductor

[Vic Rosenthal]

I suggest that the preamp should be OFF on 80-40-30m and usually on 20m. It is mostly useful on higher bands.
Also AGC threshold of 5 is probably too low, causing it to activate on band noise and weak signals. Try 10.
The way you have it set will result in a very noisy sounding receiver.

Vic 4X6GP

> On 13 Oct 2016, at 22:58, "glcazzola at alice.it" <glcazzola at alice.it> wrote:
> 
> 
> 
> Many thanks Guy for you help. I use K3S from april and can be that I havent set at the best the rig.I work 90% CW, usually with 500hz 5 pole filter, sometime with the 200hz 6 pole.Usually I work 40-20-17-15-10 meter, in contests also 80 meters.In these last months I worked expecially 40-20-18-15.Usually I have AGC slow for ragchewing and fast for contests, always qsk with a bug.PRE - noATT-  no AGC - slow, sometime fastANT - a Force 12 C4 yagi (2el 20 - 3el 15 - 3 el 10m - 1 element 40m 17m 12m  - also have a dipole 80m-40m inv vee low on a roof at 5th floor; the yagi is 8m high from this roof (composite material, including aluminum layer), the buildings around are lower.RX ANT - noWIDTH - the same as xtal filter, 500hz or 200hz.
> in the CONFIG MENU I have: AGC DCY - norAGC HLD - 0.00AGC PLS - norAGC SLP - 012AGC THR - 005AGC-F - 120AGC-S - 020
> Now with the 500hz filter and agc fast, no preamp no attenuator,  ant yagi  to north america,  in this moment, I have this noise (local time 22.00):40m---- S7 20m ----S4 S517m --- S3 S415m -  S312 m --- S1 S228mhz--- S4Some time of the day noise from long range radar, wide spectrum military emissions or domestic applience or lights noises go up to S9.
> You asked the higher signals that I receive: say 20dB over S9 or even 30dB over S9 from a pair of local hams at the other side of my town.
> But I work all kind of signals low and high (327 countries DXCC and a lot of ragchew CW).
> Thanks for your patience :)
> Ian IK4EWX
> 
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> 
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> 
> ----Messaggio originale----
> Da: k2av.guy at gmail.com
> Data: 13-ott-2016 21.08
> A: "Gian Luca Cazzola"<glcazzola at alice.it>, <donwilh at embarqmail.com>
> Ogg: Re: [Elecraft] K3S - K3 Noise Blanker and Noise Reductor
> 
> Hi, Ian,
> 
> Can you possibly tell me these settings, please? You are getting
> results very, very different than I do.
> 
> What bands are you using?
> 
> On each band in question, what is the noise floor on the s-meter when
> the band is open.
> 
> On each band in question, what is the s-meter reading for the loudest
> signals you are receiving when the band is open.
> 
> On each band in question, what are these settings made from the front
> panel: PRE, ATT, AGC, ANT, RX ANT, WIDTH,
> 
> What are these settings made in the CONFIG MENU: AGC DCY, AGC HLD, AGC
> PLS, AGC SLP, AGC THR, AGC-F, AGC-S
> 
> There is some kind of interaction with NB and NR for each of these.
> Perhaps there are one or two of them that are reducing your results.
> 
> 73, Guy K2AV
> 
> 
> 
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