[Elecraft] K3 - noise reduction query

Don Wilhelm w3fpr at embarqmail.com
Fri Jul 4 11:43:28 EDT 2014


Bill,

With the NB, it will often help to *increase* the RF gain or turn on the 
preamp.  The noise impulse must be above a threshold before it will 
trigger the blanking function.  Keep in mind that setting the NB so the 
blanking pulse is wider may result in distorted signals. It does just 
what the name suggests, it puts a blank *hole* in the received signal.

The NB is better for fast rise time impulse noise such as lightning and 
automotive ignition noise.  NR will do nothing to help that type noise.

I do not believe there is any one magic bullet.  What works for one 
noise may not work for the next one.

73,
Don W3FPR

On 7/4/2014 10:39 AM, Bill W2BLC wrote:
> Actually - all of the above. I have spent a lot of time playing with 
> all the NB and NR settings (there are many combinations) and have 
> incorporated the ATT and reduced RF Gain into the mix. My 
> understanding is bringing in the RF at a lower level allows the 
> various DSP devices to get a running start at cleaning up the noise. 
> So far I have had very little success.
>
> I am hoping someone out there has come up with a magic bullet setting 
> (or even a workable setting) that can be shared. This has been a 
> summer with loads of lightning static.
>



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