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+--- Thread: Noise Filter for Fish Finder (/showthread.php?tid=1057306)
Noise Filter for Fish Finder - Optimizer - 12-09-2018
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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Re: [Optimizer] Noise Filter for Fish Finder - RockyRaab - 12-09-2018
I'd try it first. You may have no problem at all.
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Re: [Optimizer] Noise Filter for Fish Finder - Tarponjim - 12-09-2018
You shouldn't need it. Most sonars have a noise suppression button/setting too. Route your wires apart. Test first.
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Re: [Optimizer] Noise Filter for Fish Finder - MichiganAngler - 12-09-2018
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/TrollingMotorInterference
https://www.crappie.com/crappie/fishing-electronics-and-photography/248165-ferrite-ring/
Hope that helps.
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