Noise Filter for Fish Finder

[Optimizer]

Since I am setting up a Minn Kota motor on my Toon and I have heard about the electrical noise problems (transient voltage) affecting the fish finder when using the same 12V battery; I have wondered about the possibility of using a good transient noise suppression filter inline with the fish finder rather than having to add the weight and maintenance of a second dedicated battery for the fish finder.

I found a cheap filter that looked like it would do the job, so I just thought I would share the info (have not tried it out yet):

Boss Audio B15N - 12 Amp Automotive Noise Suppressor

[url "https://www.walmart.com/ip/Boss-Audio-B15N-12-Amp-Automotive-Noise-Suppressor/28875652"]Here is a link to the filter:
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[RockyRaab]

I'd try it first. You may have no problem at all.
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[Tarponjim]

You shouldn't need it. Most sonars have a noise suppression button/setting too. Route your wires apart. Test first.
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[MichiganAngler]

It's common to get interference when running a sonar on the same battery as a trolling motor. Having a grounded battery helps.

In your situation, the best bet is to try some ferrite rings. Otherwise I'd consider running your sonar off a separate 9aH battery.

https://www.humminbird.com/support/faqs/...terference

https://www.crappie.com/crappie/fishing-...rite-ring/

Hope that helps.
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