[Elecraft] How does K2 NB work?

[Don Wilhelm]

Fred,

The KNB2 does a good job on impulse noise - those noise pulses with a fast
rise time such as ignition noise.  I can't explain why it did not attack the
ignition noise from the cement trucks.

For the more constant background types of noise - 'popcorn' noise as you
described it, the KNB2 does not trigger on them at all because the level is
not strong enough and there are no pulses above the threshold.  The most
effective solution to these background noises is the noise reduction
algorithms of the KDSP2.

73,
Don W3FPR

> -----Original Message-----
>
> Thinking of building my 2nd K2.  I wondered what
> the consensus is on HOW WELL DOES THE NB WORK?
> in a K2?
>
> In my spring #5422 K2 - I never could see much
> improvement in "noise" elimination.  I had
> experienced a situation where we had major
> trucks near our house (cement job) - and the
> ignition or engine electrical noise was major.
> The NB, in either setting - semmed to do nothing
> noticeable to remove this type of noise.
>
> The repetitive "popcorn" hissing noise - sort
> of regular brownian white noise one hears on
> 40 and 20 - wasn't improved on either.
>
>