[Elecraft] NB IF NAR/CODEC

[Bob McGraw K4TAX]

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.
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