[Elecraft] K3 - noise reduction query

Eduardo González edujoseg at gmail.com
Fri Jul 4 11:07:37 EDT 2014


Just now i'm suffering a impulsive noise not filtered by IC-7700,
IC-756proIII, IC-781, however K3 is capable filter this noise with a beside
artifacts, audio become distorted because only is filtered with aggressive
adjustments.

Edu
Yv4gmj
On Jul 4, 2014 10:30 AM, "Eduardo González" <edujoseg at gmail.com> wrote:

> Probably K3 NB is not effective filtering your particular noise. Impulsive
> noise is very hard of characterize because are infinite patterns possible.
> I have filtered majority of arching noise but eventually not was possible.
> You are tested NB analog and NB digital and combined both?
> I remember a 11m radio (3-5825A) with a NB more effective than TS-440S,
> with only a particular noise.
> Recently I discovered a static noise effectively filtered by IC-736 but a
> IC-781 wasn't capable
> We must accepts not cheap equipment wasn't capable filter a type of noise
> is frustrating.
>
> Edu yv4gmj
> On Jul 4, 2014 9:51 AM, "John, 9H5G" <kk4oyj at gmail.com> wrote:
>
>> Bill,
>>
>> I suggest you use your TS-480 rather than the K3 if that's what works for
>> you. Personally, mine has been gathering dust since I got my K3.
>>
>> 73 de John, 9H5G
>>
>> > On Jul 4, 2014, at 3:36 PM, "Joe Subich, W4TV" <lists at subich.com>
>> wrote:
>> >
>> >
>> > > The sad part is that My cheap little Kenwood TS480 does a much better
>> > > job of cleaning up this noise.
>> >
>> > You are trolling for complaints on the Elecraft noise reduction - not
>> > looking for a "solution".  The Elecraft noise reduction is designed for
>> > "smooth" noise - not impulse noise which is a noise blanker function.
>> >
>> > A smooth noise reduction system (LMS)  operates by forming bandpass
>> > filters around what it determines to be "signal" components and passing
>> > just the "signal".  You will have better results with lightning by
>> > working with the noise blanker - probably on a "long" setting - as
>> > it is designed to work with fast rise time signals.
>> >
>> > 73,
>> >
>> >   ... Joe, W4TV
>> >
>> >
>> >> On 2014-07-04 9:17 AM, Bill W2BLC wrote:
>> >> It is lightning season and I have been floundering around the menus on
>> >> the K3's DSP NR system. I have found no setting that really do much of
>> >> clean-up on lightning static. I also have tried using the ATT and RF
>> >> Gain settings also.
>> >>
>> >> The sad part is that My cheap little Kenwood TS480 does a much better
>> >> job of cleaning up this noise.
>> >>
>> >> Of course, lightning static is very random and difficult to reduce. My
>> >> use of HF is 40 and 75, so directional antennas are not an option - as
>> >> some suggested.
>> >>
>> >> Please do not answer with direct emails - the group needs to share in
>> >> this knowledge.
>> >>
>> >> Thanks,
>> >>
>> >> Bill W2BLC K-Line
>> >>
>> >>
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