[Elecraft] Noise Nuller

[hb9cvq at hispeed.ch]

Pretty impressive Dave, thanks for sharing.

I am lately experimenting a lot with HF noise reduction by RX Ant Phasing Controller DXE NCC-2.
I know , a different story , because I am only using one RX input port only (FTDX101MP, K3S-P3).
That is main (TX/RX) and RX auxiliary antennas as input channels for the NCC-2. The antenna choices/positions are key!
When testing RM-Noise (external server processing)  https://ournetplace.com/rm-noise/
it appears to be too much latency for e.g. 30WPM CW.
It is generally clear Groundwave ( constant) and Skywave ( uncontrolled variable) phasing is different.

Questions:
1.)  Is there a relevant latency issue in your procedure, no internet involved ?
2.) I think you need to train your system with QRM, right, as shown ?
3.) If QRM type/QRG changes, will you have to retrain?
4.) Can you produce and store a QRM database for quick reuse?
5.) What do you think about the Dj5EU System  https://www.qrz.com/db/DJ5EU, he can even minimize QRN (9th sample) by directivity.


Tnx, cu, vy 73 Andy
HB9CVQ, DK2VQ, AK4IG

https://www.qrz.com/db/HB9CVQ





-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of David Gilbert via Elecraft
Sent: Wednesday, July 15, 2026 9:30 AM
To: elecraft at mailman.qth.net
Subject: [Elecraft] Noise Nuller


Here is a streamlined version of an earlier application I made. This one is more automated and focused strictly upon noise reduction using diversity processing.

https:/www.ab7e.com/NoiseNuller.html

This is a relatively brief video demonstration of it.

https://youtu.be/WkMMvyLcWYo

Dave   AB7E

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