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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: 17,862
grout-scout
TFF Guru
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TFF Guru
Joined: Dec 2008
Posts: 17,862 |
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: 12,266
shut-up-and-fish
TFF Guru
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TFF Guru
Joined: Feb 2010
Posts: 12,266 |
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: 5,160
Wayne P.
TFF Celebrity
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TFF Celebrity
Joined: Nov 2010
Posts: 5,160 |
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: 5,160
Wayne P.
TFF Celebrity
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TFF Celebrity
Joined: Nov 2010
Posts: 5,160 |
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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