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Dec 30th, 2023
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 Graph question
#12507086
11/17/17 09:00 PM
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Joined: Apr 2012
Posts: 739
T-Gauntt
OP
Pro Angler
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OP
Pro Angler
Joined: Apr 2012
Posts: 739 |
I'm sure this question has probably been asked time and time again on TFF but if I step on my trolling motor and it causes interference on my depth finder, what is the cause? Is something not grounded properly?
-Taylor
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Re: Graph question
[Re: T-Gauntt]
#12507186
11/17/17 10:23 PM
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Joined: Dec 2008
Posts: 17,882
grout-scout
TFF Guru
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TFF Guru
Joined: Dec 2008
Posts: 17,882 |
If you have a minnkota, pull the head cap off and see if the fuse is blown. There are multiple reasons for electrical interference: prop is knicked up/damaged, transducer cable is close to the tm power wires, bad bearings in the tm motor, graph powered by the tm batteries. I�ve even swapped graphs around and had the interference stop.
Sometimes a ferrite choke will help too.
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Re: Graph question
[Re: T-Gauntt]
#12507420
11/18/17 02:00 AM
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Joined: Dec 2006
Posts: 3,308
Dayne
TFF Team Angler
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TFF Team Angler
Joined: Dec 2006
Posts: 3,308 |
I run Motorguide trolling motors and Lowrance electronics. On the last 2 trolling motors I have had to install ferrite chokes to reduce the interference.
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Re: Graph question
[Re: T-Gauntt]
#12507966
11/18/17 03:38 PM
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Joined: Feb 2010
Posts: 12,267
shut-up-and-fish
TFF Guru
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TFF Guru
Joined: Feb 2010
Posts: 12,267 |
Is the graph wired direct to the starting battery (recommended)
If it is wired to an accessories switch and or fuse panel that can create interference as well.
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Re: Graph question
[Re: T-Gauntt]
#12510517
11/20/17 06:50 PM
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Joined: Apr 2012
Posts: 739
T-Gauntt
OP
Pro Angler
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OP
Pro Angler
Joined: Apr 2012
Posts: 739 |
Wired direct to cranking battery. When I'm not stepping on the power button the graph reads perfectly clear. Fuse is not blown.
Is there a specific ferrite choke I'm supposed to use, and is there any specific place where it's best to install?
-Taylor
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Re: Graph question
[Re: T-Gauntt]
#12510531
11/20/17 07:14 PM
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Joined: Jul 2012
Posts: 12,214
Cast
TFF Guru
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TFF Guru
Joined: Jul 2012
Posts: 12,214 |
Any ferrite bead will help. Always install near source of power.
Cast ![[Linked Image]](http://winsounds.com/wp-content/uploads/2013/11/Longhorn-Logo.png) I have a short attention spa
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Re: Graph question
[Re: T-Gauntt]
#12510634
11/20/17 09:09 PM
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Joined: Nov 2010
Posts: 5,163
Wayne P.
TFF Celebrity
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TFF Celebrity
Joined: Nov 2010
Posts: 5,163 |
Ferrites should be attached close to the equipment to filter any RFI that is picked up along the cable. On a transducer cable just before the transducer plug, and on a power cord just before its plug. https://www.oldwillknottscales.com/how-to-install-a-ferrite-bead.htmlhttp://www.ni.com/pdf/manuals/321221a.pdf
Helix 12 CHIRP MEGA SI+ GPS G4N, SOLIX 10 G3, Helix 15 CHIRP MEGA SI+ GPS G4N,
Helix 8 CHIRP MEGA SI+ GPS G4N, SOLIX 12 G3, MEGA 360, MEGA LIVE TL , MEGA LIVE 2, Xplore 10
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Re: Graph question
[Re: T-Gauntt]
#12510638
11/20/17 09:14 PM
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Joined: Nov 2010
Posts: 5,163
Wayne P.
TFF Celebrity
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TFF Celebrity
Joined: Nov 2010
Posts: 5,163 |
Helix 12 CHIRP MEGA SI+ GPS G4N, SOLIX 10 G3, Helix 15 CHIRP MEGA SI+ GPS G4N,
Helix 8 CHIRP MEGA SI+ GPS G4N, SOLIX 12 G3, MEGA 360, MEGA LIVE TL , MEGA LIVE 2, Xplore 10
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