WNB doesn't seem to do anything?

John KB4DU

No matter if the WNB is on or off, the noise level stays the same. I sounds like power line noise (frying). The NR helps a lot but not the WNB. Am I expecting too much?

Jim Miller

KC8P

All depends of the noise characteristics, sometimes works well, sometimes does not.

k3Tim

WX7Y

KF4HR

David Decoons, wo2x

I have power line arcing here that rears its ugly head after a windy day. I use the WNB with level of 92. The results are stunning. I can see a 20 tp almost 30 dB drop in noise floor. Makes the difference in being able to work stations or not. I have YouTube videos demonstrating the effect on my noise. Steve Hicks has used one of my videos in his presentations on WNB. One note - as you get closer to 100 you will reach a point where it get distorted and rx cuts out. Dave wo2x

John KB4DU

None of those make any difference for me.

John KB4DU

WX7Y

David Decoons, wo2x

Try a setting around 90 to 92. I find on my power line noise issue that 92 works on 80 meters. It may not be power line noise but another type of noise. For those going to Xenia my radio will be one of the radios available from the booth via SmartLink. Today my noise floor is about -105 without WNB and -120 with it. It was windy here today so not sure if the noise will act up over the weekend. Dave wo2x

Dudley WA5QPZ

John KB4DU

Bill -VA3WTB

The pictures show that the WNB was not effective on the type of noise on the pass band. If it were, the noise floor in the picture would have dropped, sometimes dramitically.
Setting the AGC-T as has been discribed is important for propper WNB performance.

John KB4DU

Can you explain this? How does the AGC-T affect the WNB performance?

WX7Y

BOTTOM LINE, it doesn't
If you DON'T have the type of noise the WNB is designed for then you will NEVER see or hear it and won't ever see when it come on or hear the benefits it provides as has already been said a few times on the other posts.

You should fill lucky you don't have it at your location, it sure helps with the Chinese or who ever's it is, over the horizon Radar that I hear at times. 

AGC-T cuts down the noise on the band so the Voice audio pop's out at you, these are for 2 different things and the AGC-T will work on everything unlike the WNB.
 
MOST filters on the Flex won't effect the Pan-adapter or S- Meter levels as this is how the FLEX radio's are designed.

Most other radio's when you put a DSP filter or other settings like attenuation or Pre-Amps really effect the S-Meter if that's what your looking for you won't see it on the FLEX because the FLEX is a calibrated S meter and not a relative S-Meter like most other radio's. 

Hope this makes sense 

Bill -VA3WTB

Bottom line it does,,sorry.

If you have a noise that the WNB works on, with the WNB turned on and the noise goes away, if you have the AGC-T slider turned to far to the right the  noise floor becomes to noisy.

By setting the AGC-T to the knee or just below, the noise is controled as the WNB takes away the interfearence it's taking out. They both need to be working together in order to have the best Signal to noise performance.

The AGC-T looks after the nois floor, and the WNB looks after the interference.

Dave - W6OVP

David Decoons, wo2x

The only parameter that really affects level of WNB slider for combatting power line noise is antenna gain/attenuation. Typically for my power line arcing I use a level of 92 with no preamp. On 40 meters I can see a 15 to almost 25 dB drop in my noise floor. AGC-T has no effect on whether it works or not. AGC-T will reduce background noise making receiving less fatiguing but will not improve ability to receive very weak signals. There may be other sources of noise in which the WNB is effective and in those situations a different value of the slider may yield better results. Time for me to get the power company out here again. Dave wo2x

K5XH

James Del Principe

KD0RC

James Del Principe

Len, thank you for the fast reply.   Yes, I do wait for a long time. Over a minute it does nothing. So for reference, let me ask you what your average noise level is.  Right at this moment, 3 PM eastern, in North Georgia, in the very deep woods it is - 115 on the panadapter which is around S 4.5 or so, which is -100 dBM, give or take on 80, 40 and 20 meters. Granted, this is a quiet day here with no bad weather, full sunshine. Can you tell me how this compares to your situation?    Jim

David Decoons, wo2x

KD0RC

KD0RC

James Del Principe

Thank you for the detailed information. Mine is not as quiet with an OCF dipole above the house at 30 FT.  The preamps are off and no attenuation. Removing the antenna also causes a drop as the external band noise exceeds the internal noise. I do not have the span for the entire band but set to the phone portion or CW portion when testing. Many Thanks, Jim

James Del Principe

Yes, that is amazing. So why, I wonder, do some experience this high degree of noise reduction and others do not? Is it release dependent or because there is a high level of noise to start with?    Mine has never shown any effect..... V 1.12.1

David Decoons, wo2x

Simple - it depends on the noise source. For wideband noise caused by powerlines and rogue street lights the WNB is very effective with a setting around 93. This noise shows as the whole noise floor elevated, not in humps but straight line across.

For other types of noise from washing machines, air conditioners, etc it is not ver effective.

Dave wo2x

James Del Principe

Dave, I certainly agree with your assessment, but I am looking at across the band noise when I select the WNB....set to max or any other position and it still does nothing...   nada.   I have tried it with different levels of AGC-T with no difference.
I do run the AGC-T rather low, below the knee of the curve at around 32 or so and never use the preamps.

Bill -VA3WTB

Then the filter is not made to work with the noise you have.