Re: [Elecraft] K3S Noise Reduction

In addition to Al's helpful post, new owners should understand the difference between Noise Blanker (NB) and Noise Reduction (NR) tools as implemented in Elecraft radios. Recent posts indicate confusions between the two.  They function differently in order to address different sources of noise

Re: [Elecraft] K3S Noise Reduction

Good advice from Chuck and Bob below. The thing to remember is that the noise reduction isn't just an on/off button. There are 32 levels of noise reduction to choose from. Some of the levels add just a touch of NR while others almost destroy the signal, adding artifacts and other things in the

Re: [Elecraft] K3S Noise Reduction

I used to complain about the K3's NR functions, but now I have a much newer TS-890s sitting next to it, and in comparison, the K3's NB and NR are far better. So everything is relative. 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 07/11/2022 3:33, Ri

Re: [Elecraft] K3S Noise Reduction

On 11/6/2022 8:55 PM, Brian Hunt wrote: I’ve found that, properly adjusted, it works very well on CW but using it on SSB created unacceptable “mush” on the audio. The best NR I've heard, and nothing else was close, was demonstrated to me by Warren Pratt, NR0V who is credited with developing P

Re: [Elecraft] K3S Noise Reduction

There was a very good description of the K3 NR written by Lyle, the DSP designer for Elecraft. It may be on their website. Basically, as I understand it, the NR is designed to work against random noise. Noise that has a correlated component, like line noise, it doesn’t address as well. I’ve

[Elecraft] K3S Noise Reduction

Thanks to all who chimed in about this. I will be trying everyone’s advice. I still think it’s sad that all I have to do to significantly block noise in SSB on my old IC-706MkIIG and my IC-7300 is touch one button: most of the noise is gone and the level of the audio itself hasn’t dropped so you

Re: [Elecraft] K3S Noise Reduction

e Get Outlook for Android<https://aka.ms/AAb9ysg> From: elecraft-boun...@mailman.qth.net on behalf of Richard Sent: Sunday, November 6, 2022 8:33:08 PM To: Elecraft Reflector Subject: [Elecraft] K3S Noise Reduction Is there ANY way to make the NR feature work w

Re: [Elecraft] K3S Noise Reduction

Richard, I saw this explanation of a procedure to adjust the NB from this reflector. I’ve tried it and it works. Also see page 103 of “Getting the Most from Elecraft K3” by Fred Cody KE7X. 73, Chuck K0MV The approach I use for the Noise Blanker is this. I first activate the NB and then the L

[Elecraft] K3S Noise Reduction

Is there ANY way to make the NR feature work worth a damn? In general, when I turn it on, the audio level drops to almost nothing, and none of the Adjustment setting do much of anything. My other two radios, an old Icom and a new Icom, both have very effective NR features. Is this a design hea

Re: [Elecraft] K3S Noise reduction Test

I too would like the NR to use the A & B knobs and even greater options with the B knob. I think I would find it much easier to select the right settings on the fly. Maybe user selectable in the next or upcoming K3/K3s update? 73, Gary KA1J __

Re: [Elecraft] K3S Noise reduction Test

Jim Brown Wrote EXACTLY RIGHT! The scientific study of how we hear and perceive sound is called psychoacoustics, and is one of many important disciplines of the Acoustical Society of America. Early work at Bell Labs and at universities like MIT and Harvard became the basis for stereo. Some

Re: [Elecraft] K3S Noise reduction Test

Folks - Let's rest this thread for now as its exceeding our posting limit. 73, Eric List modulator etc. /elecraft.com/ On 6/21/2017 10:03 AM, wa9fvp wrote: nr4c. bill wrote, But that knob varies a whole other range of NR. How hard is it to turn one knob 32 clicks? 32 clicks but only 4 NR level

Re: [Elecraft] K3S Noise reduction Test

On Wed,6/21/2017 9:38 AM, John Stengrevics wrote: Jim, Is there a similar unit that covers 50 MHz? Not that I know of. Or, a way to modify the NCC-1/NCC-2? No. It is far too complex a unit, and would have to be redesigned from scratch. 73, Jim K9YC ___

Re: [Elecraft] K3S Noise reduction Test

nr4c. bill wrote, But that knob varies a whole other range of NR. How hard is it to turn one knob 32 clicks? 32 clicks but only 4 NR levels. The other settings are delays and mixed signals. There aren’t enough level settings. -- Jack WA9FVP- http://www.willcoele.com/radio_repair

Re: [Elecraft] K3S Noise reduction Test

David W. wrote Noise reduction is about reducing subjective noise for the listener, not about reducing some engineering measurement. I replied, I’m not sure what you mean by “reducing some engineering measurement”. The test was to characterize the K3S NR settings. David W. wrote An instrumen

Re: [Elecraft] K3S Noise reduction Test

EXACTLY RIGHT! The scientific study of how we hear and perceive sound is called psychoacoustics, and is one of many important disciplines of the Acoustical Society of America. Early work at Bell Labs and at universities like MIT and Harvard became the basis for stereo. Some of the first publi

Re: [Elecraft] K3S Noise reduction Test

Jim, Is there a similar unit that covers 50 MHz? Or, a way to modify the NCC-1/NCC-2? 73. John WA1EAZ > On Jun 21, 2017, at 12:33 PM, Jim Brown wrote: > > Yes, the NCC-1 is a superb unit, especially for use on 160, 80, and 40M. It's > usefulness diminishes above 30M. I'm using one to phas

Re: [Elecraft] K3S Noise reduction Test

Yes, the NCC-1 is a superb unit, especially for use on 160, 80, and 40M. It's usefulness diminishes above 30M. I'm using one to phase a spaced pair of VE3DO loops that are physically aimed at EU. Using the NCC-1, I can shift the pattern +/- 20-30 degrees. The combined loops produce some pretty

Re: [Elecraft] K3S Noise reduction Test

The VFO-A knob currently has no function while NR "long push" is engaged. 73, Drew AF2Z On 06/20/17 22:20, Nr4c wrote: But that knob varies a whole other range of NR. How hard is it to turn one knob 32 clicks? Sent from my iPhone ...nr4c. bill On Jun 20, 2017, at 2:51 PM, Drew AF2Z wrote

Re: [Elecraft] K3S Noise reduction Test

Noise reduction is about reducing subjective noise for the listener, not about reducing some engineering measurement. An instrument is likely to generate some very simple, or even pure tone, signal. With the sorts of strategy used for noise reduction, and very aggressive settings, you could o

Re: [Elecraft] K3S Noise reduction Test

My experience with noise cancellation, by no means exhaustive or even quantitative, is that it is surprisingly effective, almost to the point of "magic", provided the noise source is a single point. It was essentially ineffective if there were multiple sources, or the source was extended in spa

Re: [Elecraft] K3S Noise reduction Test

-05:00) To: Dave Cole , elecraft@mailman.qth.net Subject: Re: [Elecraft] K3S Noise reduction Test I think the ncc1 is under rated. Here is an example  of what it can do. I was plagued by a neighbour with outdoor high intensity lights which he insisted on leaving on during the day.. It was eith

Re: [Elecraft] K3S Noise reduction Test

bject: Re: [Elecraft] K3S Noise reduction Test Don, Thanks for the info, but as John said, I was suggesting a noise canceling setup...  I was not clear enough, my error. 73s and thanks, Dave NK7Z http://www.nk7z.net On 06/20/2017 06:39 PM, j...@kk9a.com wrote: > But that is not what NK7Z is su

Re: [Elecraft] K3S Noise reduction Test

Don, Thanks for the info, but as John said, I was suggesting a noise canceling setup... I was not clear enough, my error. 73s and thanks, Dave NK7Z http://www.nk7z.net On 06/20/2017 06:39 PM, j...@kk9a.com wrote: But that is not what NK7Z is suggesting. He suggested a built in noise cancell

Re: [Elecraft] K3S Noise reduction Test

Thank you John. That is exactly what I was suggesting. 73s and thanks, Dave NK7Z http://www.nk7z.net On 06/20/2017 06:39 PM, j...@kk9a.com wrote: But that is not what NK7Z is suggesting. He suggested a built in noise canceller which would be awesome! John KK9A Don Wilhelm wrote Tue Jun 20 1

Re: [Elecraft] K3S Noise reduction Test

Well, not exactly... the K3S doesn't have the ability to perform the phase shifting for noise cancellation. However, the K3 has antenna OUT and IN jacks which allow the use of the NCC-1 (now NCC-2) from DX Engineering to perform the noise cancellation. I've been doing this for years and it w

Re: [Elecraft] K3S Noise reduction Test

But that knob varies a whole other range of NR. How hard is it to turn one knob 32 clicks? Sent from my iPhone ...nr4c. bill > On Jun 20, 2017, at 2:51 PM, Drew AF2Z wrote: > > The only thing I would change in NR is to make it easier to scroll through > the settings. Currently you can only g

Re: [Elecraft] K3S Noise reduction Test

Had an ANC noise canceller like this. MFJ makes one too. Same idea. Collins also had such a thing for their mobile way back when using a separate whip on the back of the vehicle. They work well but only for one signal source at a time. If you have two noise sources located differently, you c

[Elecraft] K3S Noise reduction Test

But that is not what NK7Z is suggesting. He suggested a built in noise canceller which would be awesome! John KK9A Don Wilhelm wrote Tue Jun 20 19:51:45 EDT 2017 Dave, The K3S has a receive antenna connection so you can do exactly that. The low noise antenna is up to the operator to provide.

Re: [Elecraft] K3S Noise reduction Test

Dave, The K3S has a receive antenna connection so you can do exactly that. The low noise antenna is up to the operator to provide. If you have the KRX3 option installed, diversity reception may also help. 73, Don W3FPR On 6/20/2017 6:21 PM, Dave Cole wrote: What would be really nice would be

Re: [Elecraft] K3S Noise reduction Test

My reference to “complex waveforms” was the underlying noise waveform, not the signal of interest, which for this type of test would normally be a single tone. > On Jun 20, 2017, at 4:34 PM, wa9fvp wrote: > > As I mentioned in my document > > “Human speech contains sinusoidal elements that th

Re: [Elecraft] K3S Noise reduction Test

What would be really nice would be to have a separate antenna designed for noise reception, and the ability to phase shift it from the normal antenna, allowing for noise cancellation... 73s and thanks, Dave NK7Z http://www.nk7z.net On 06/20/2017 11:53 AM, wa9fvp wrote: Believe it not, the ide

Re: [Elecraft] K3S Noise reduction Test

Even if we have to slog through all the NR settings sequentially I'd still prefer to keep them all, no matter how similar they appear on the scope. Having used the K3 for a number of years I have at times noticed an audible difference between them when copying weak CW signals. Can't really char

Re: [Elecraft] K3S Noise reduction Test

As I mentioned in my document “Human speech contains sinusoidal elements that the LMS algorithm adapts to and creates a filter around the speech waveform. The waveform constantly changes and to conform to the human speech patterns, the LMS filter must continuously change the filter’s shape.

Re: [Elecraft] K3S Noise reduction Test

You might want to look at actual (S+N)/N data. I’m not sure the visual “test” tells the full story, since these are complex waveforms. I did extensive measurement several years ago on the NR functions of the v1 and v2 firmware versions of the TenTec Orion (for some reason, noise reduction not

Re: [Elecraft] K3S Noise reduction Test

If you look at my data, there’s very little noise level difference in the delay settings. The level or aggressiveness is what reduces the noise. Having two knobs to change the parameters is also a good idea. I would prefer a finer adjustment in the level settings like 0 to 10 For people, like m

Re: [Elecraft] K3S Noise reduction Test

The K3/K3S Noise Reduction is disabled for FM and Data modes. -- Jack WA9FVP- http://www.willcoele.com/radio_repair The Radio Reclamation Center (815) 463-9365 From: Jim Brown-10 [via Elecraft] [mailto:ml+s365791n7631918...@n2.nabble.com] Sent: Tuesd

Re: [Elecraft] K3S Noise reduction Test

Believe it not, the idea of adding NR delay is not new. Back in 91, when I did the testing for the Hamblaster, we were experimenting with NR delays. Even with the Hamblaster the delay function made very little difference. I only settled on two delay settings. All of the others, there were about

Re: [Elecraft] K3S Noise reduction Test

The only thing I would change in NR is to make it easier to scroll through the settings. Currently you can only go through the 32 settings sequentially with the VFO-B knob, from 1-1 through 8-4. It would be nice if the VFO-A knob could be employed to increment and decrement the first parameter.

Re: [Elecraft] K3S Noise reduction Test

Back in the early 90’s I worked with another engineer on a QST inspired project called “The Hamblaster”. It was a DSP based sound card that did, noise reduction. I should probably say “done there, did that”. To test the Hamblaster noise reduction, I did a similar test at the audio level exce

Re: [Elecraft] K3S Noise reduction Test

Correct me if I'm wrong, but is it not the case that the NR on the K3 isn't just a case of "more" as you change settings, but also a case of changing the _type_ (or strategy) of NR? Or am I thinking of NB? Nick On 20 June 2017 at 10:20, Jim Brown wrote: > On Tue,6/20/2017 10:09 AM, Dave Col

Re: [Elecraft] K3S Noise reduction Test

On Tue,6/20/2017 10:09 AM, Dave Cole wrote: It works very well! I think there are too many settings and some can be eliminated. What are your thoughts? Elecraft's NB and NR systems are designed so that they can be optimized for a wide variety of noise, and a wide variety of operating modes

Re: [Elecraft] K3S Noise reduction Test

Thanks for sharing! 73s and thanks, Dave NK7Z http://www.nk7z.net On 06/20/2017 08:48 AM, wa9fvp wrote: I did a comprehensive test of the K3S noise reduction system and uploaded the same document to the Elecraft_K3 Yahoo group. Elecraft_K3_NoiseReduction.pdf

Re: [Elecraft] K3S Noise reduction Test

To what productive/beneficial end? __ Clay Autery, KY5G On 6/20/2017 10:48 AM, wa9fvp wrote: > I did a comprehensive test of the K3S noise reduction system and uploaded the > same document to the Elecraft_K3 Yahoo group. > > > Elecraft_K3_NoiseReduction.pdf >

[Elecraft] K3S Noise reduction Test

I did a comprehensive test of the K3S noise reduction system and uploaded the same document to the Elecraft_K3 Yahoo group. Elecraft_K3_NoiseReduction.pdf Here's what I concluded. Settings Fn-1 provides the