Thread: RF Interference

I don't live far from Tommy and he got me motivated to work on my trolling motor interference. I have a terrova with US2 that was connected to a 998 and then networked back to a 798. When fishing, I always leave the 798 recording on side imaging. When the trolling motor would run, it would cause interference on the 798. I disconnected the network cable and the interference went away. I assumed it was from the US2, so I installed a spare external transducer on the Terrova and had the same interference with the external transducer as with the US2. The fix was to run an additional ground from the skeg on the trolling motor to the neg side of the Humminbird power as per the FAQs on the humminbird website. This appears to have completely cleaned up all the interference.

http://www.humminbird.com/Category/S...-Interference/

A cheap cb filter wprked best for me. I also used ferrite cores .
Zero noise

I just bought motor guide x5 and have a helix 7 anytime I power trolling motor I get interference I have loosened the transducer cable up that is attached to the shaft it helped but still there. Any ideas on what I can do? I read previous posts but not sure I'm understanding the drilling and running ground wires. Thanks

Shortdraw did the Helix power cord have a choke on it? If not call HB and ask for the power cord with one built in.

You talking about the cord with the thick round looking thing? It does have that...

Originally Posted by shortdraw

You talking about the cord with the thick round looking thing? It does have that...

Yes that's the one I was talking about.

Originally Posted by shortdraw

I just bought motor guide x5 and have a helix 7 anytime I power trolling motor I get interference I have loosened the transducer cable up that is attached to the shaft it helped but still there. Any ideas on what I can do? I read previous posts but not sure I'm understanding the drilling and running ground wires. Thanks

Get some shielding and copper tape.

Ground motor head and shielding together

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sorry for the slow response...got busy with windows and siding on house. yes it does have the filter in in the cord. talked to humminbird they said there was a way to go into the settings and fix that now I forgot how they said to do it so Ill call them again. That is unles someone knows how or what humminbird was talking about.