Hey Omni,
Just me again with a bit more explanation.
I have an aluminum Skeeter , Echomap Ultra 126 -GT56, two Bird Helix 10’s , and a
MK Ultrex .
A friend Jim went over 2 years battling induced noise produced by his Ultrex and viewed on his Birds. Many , many phone calls to Hummingbird with suggestions of ferrite beads, cable rerouting/ wrapping and so forth with much help at all. Eventually Jim found a guy on YouTube with a video who suggested a grounding wire between the Ultrex and the negative of the battery that supplies power to his Humminbird’s . He tried it and the induced noise issue vanished completely.

Yes , I have the cable from the Ultrex , Garmin 126 water ground tied to the battery that supplies the Garmin and the two Helixes.
No ferrite beads or special routing. Zero induced noise.
Again this could possibly help your wavy issue.
Good luck with a resolve.



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