Thread: RF Interference

It has been requested that we have a sticky just for RF type interference with electronics. So this is the place to post your problems and cures for such type problems.

Good idea Bill...

Let me get the links to these in here right at the first..

Trolling Motor Induced Sonar Interference

http://notjustfishing.com/MotoGuide.pdf

Originally Posted by rnvinc

Good idea Bill...

Let me get the links to these in here right at the first..

Trolling Motor Induced Sonar Interference

http://notjustfishing.com/MotoGuide.pdf

This was Canepole's and DonG's idea. I think It could turn into something good.

Originally Posted by rnvinc

Good idea Bill...

Let me get the links to these in here right at the first..

Trolling Motor Induced Sonar Interference

http://notjustfishing.com/MotoGuide.pdf

Where would you be able to find an RF Choke describe in the article by Motorguide?
Thanks

Originally Posted by crappiemax

Where would you be able to find an RF Choke describe in the article by Motorguide?
Thanks

That is just a ferrite core. You can get them at Radio Shack.

Originally Posted by Barnacle Bill

That is just a ferrite core. You can get them at Radio Shack.

Okay that should be easy, thanks.

One more question, do they come in sizes or is it a size fits all kind of thing. This is all foreign to me.
I do steel work, here we fix everything with heat and hammers.
For the tough stuff we use more heat and bigger hammers.

Again thanks for your help.
This is a great thread. I noticed some interference in my HDS I just hooked up a few weeks ago and it's hooked to a Motorguide tour. The timing is perfect.

Originally Posted by rnvinc

Good idea Bill...

Let me get the links to these in here right at the first..

Trolling Motor Induced Sonar Interference

http://notjustfishing.com/MotoGuide.pdf

Hi, I have a question with regards to this. I have a Motorguide Wireless 55 and my side imaging goes to crap if the trolling motor is on anything other than full blast. Can't see crap. Totally hazy. I am trying to figure this out. I am also getting some white residue on parts of the motor housing like the skeg where it has been scratched. Seems like an electrical charge attracting something. What I did was to run a wire from the steel transducer clamp and tie it into the ground for my horn (easiest to try). This did not work at all.

After reading the first link, for #4 and #5, is he saying that I should run a ground from the TM ground to the motor AND one from the graph ground to the motor? Or is he saying that is a second option? Also, any other thoughts on how to cure this ridiculous problem are appreciated.

Here are some pics.

Here are a couple more references from Humminbird.
Humminbird: America
Humminbird: America

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