I was having trouble with my WNB on 20 Meters, ....

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I was getting a lot of pumping of the WNB on 20 meters and figured that there must be some strong station with very sharp transitions (distortion) on the signal.  Guess what I found?  Radio Havana at 15.370 MHz running 60 KHz wide and very distorted.

Here is a link to my recording.  With such distortion and sharp edges (or crossover, or whatever others call it) it is no wonder that the WNB was catching impulses and pumping.


This is a ridiculous signal....
But it made me wonder.  Is there a way to define the WNB so that it samples a more limited bandwidth of signals in order to do its work so that I can exclude such nasty out of band signals from the WNB's calculations?

Ken - NM9P
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Ken - NM9P

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Posted 3 years ago

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I have also seen this on the upper end of 40m band around 7.160 - 7.200. In Europe we often see some very strong international broadcast stations above 7.2. This renders the WNB almost unusable on 40m, and to an extent 80m SSB DX segment as well. So yes please, a more definable "passband" for the WNB should be very very effective.

Also, I feel that as it could be configured to just process say the current panadapor visible range then we might actually see more dynamic noise reduction because it can be better focused on the noise we are currently experiencing, not the much wider bandwidth we don't really care about.

Looking forward to the WNB focus slider...

73 de Steve G1XOW
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Alex - DH2ID, Elmer

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@Ken, @ Steve I like the idea of a WNB focus slider or bandwidth sliders showing
the focus and bandwitdth numbers. That should not be difficult to implement.
73, Alex - DH2ID