NB IF NAR/CODEC
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I have 2 K3 and a K3S and for some time I have noticed all 3 doing something that seems incorrect. All the radios are all up to correct Rev levels. For years with my normal local noise, I always ran the NB at IF Nar 1-4 most all the time with good success. In recent months, maybe more, on Nar only when I get up to NAR 1-4 to 1-7 more noise than what I am trying to remove appears ie with no NB and S4 with some minor local line noise, at NB Nar 1-7 the noise is S6 or more. I don’t see that on any Med and Wide. I don’t see any difference in what band I am on but on the higher bands I have PRE 1 on with AGC Fast or Slow. Any input from others that might have seen this is appreciated. I know in past years this did not occur and I have been lax in asking the question.
I actually checked at another QTH with only S2 on the meter and got the same results. I see I received some criticism in regard the question on CODEC. Someone said ask “what did I do last”. Well the time program was set to 1 sec maybe 6 months before I used the program that indicated there was some sort of problem and it was noticed as soon as I started using the K3S. I was only looking for some input and not blaming the K3S but since it was in the equation with the computer I had to ask. Receiving input like that I think make some not want to even ask any legitimate questions on the forum. I did receive a lot of good info and that was much appreciated. 73 Mike K4PI ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Mike,
If your noise source has changed, that is adequate reason the NB does not work as it used to. With NB and NR there is no one solution that fits all noise sources. You will just have to experiment a bit to see which settings are most effective. 73, Don W3FPR On 10/8/2018 1:46 PM, Mike Greenway wrote: > I have 2 K3 and a K3S and for some time I have noticed all 3 doing something that seems incorrect. All the radios are all up to correct Rev levels. For years with my normal local noise, I always ran the NB at IF Nar 1-4 most all the time with good success. In recent months, maybe more, on Nar only when I get up to NAR 1-4 to 1-7 more noise than what I am trying to remove appears ie with no NB and S4 with some minor local line noise, at NB Nar 1-7 the noise is S6 or more. I don’t see that on any Med and Wide. I don’t see any difference in what band I am on but on the higher bands I have PRE 1 on with AGC Fast or Slow. Any input from others that might have seen this is appreciated. I know in past years this did not occur and I have been lax in asking the question. > > I actually checked at another QTH with only S2 on the meter and got the same results. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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I normally start with the IF NB OFF. Turn on the DSP NB and adjust the
level for what I feel is optimum effect. Then remember the ## and set it to OFF. Then turn on the IF NB, set it to what I feed is optimum effect. Then go back to the DSP NB and set it to the previous value. Best done when no signal, other than noise, is on the band/frequency. 73 Bob, K4TAX On 10/8/2018 1:36 PM, Don Wilhelm wrote: > Mike, > > If your noise source has changed, that is adequate reason the NB does > not work as it used to. With NB and NR there is no one solution that > fits all noise sources. You will just have to experiment a bit to see > which settings are most effective. > > 73, > Don W3FPR > > On 10/8/2018 1:46 PM, Mike Greenway wrote: >> I have 2 K3 and a K3S and for some time I have noticed all 3 doing >> something that seems incorrect. All the radios are all up to correct >> Rev levels. For years with my normal local noise, I always ran the >> NB at IF Nar 1-4 most all the time with good success. In recent >> months, maybe more, on Nar only when I get up to NAR 1-4 to 1-7 more >> noise than what I am trying to remove appears ie with no NB and S4 >> with some minor local line noise, at NB Nar 1-7 the noise is S6 or >> more. I don’t see that on any Med and Wide. I don’t see any >> difference in what band I am on but on the higher bands I have PRE 1 >> on with AGC Fast or Slow. Any input from others that might have seen >> this is appreciated. I know in past years this did not occur and I >> have been lax in asking the question. >> >> I actually checked at another QTH with only S2 on the meter and got >> the same results. > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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