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Old 11-19-2014, 01:42 PM   #1
Jnich77 OP
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Stopping RF interfearence in headphones?

Hello!

I was curious, is it possible to stop RF interference coming through my headphones on my bike? I have satellite radio and the receiver is mounted on the handle bars, with a small AA battery powered amp under the seat. The wire connecting the two passes over the motor (routed along the frame rail under the tank), and picks up what I believe to be the coils/spark plugs firing. Its a naked bike, so I really have no way to get the wiring away from the motor/coils.

I was curious if its possible to shield the wire to stop, or at least minimize the noise? It is present all the time, and although not terribly annoying, it would be nice if it wasn't there. The sound is present regardless of the amp being on or off, and only happens when the bike is running.

Thank you
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Old 11-19-2014, 04:18 PM   #2
victor441
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If you run the wires through a metallic sheath (like coaxial cable uses) connected to ground that might help....resistor spark plug wires or resistor spark plugs help reduce RFI too but most modern bikes already have them
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Old 11-19-2014, 04:43 PM   #3
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Bad grounds can cause rf. Other than that and twisting maybe keep the audio signals away from sources. No loops.
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Old 11-19-2014, 05:03 PM   #4
Jnich77 OP
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Quote:
Originally Posted by victor441 View Post
If you run the wires through a metallic sheath (like coaxial cable uses) connected to ground that might help....
Thanks, going to try that one this weekend!
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Old 11-19-2014, 05:04 PM   #5
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Quote:
Originally Posted by rustycager View Post
Bad grounds can cause rf. Other than that and twisting maybe keep the audio signals away from sources. No loops.

All of the grounds on the bike are good.

I do have the excess looped under the seat, I'll try to figure out another way to use it up.
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Old 11-19-2014, 08:51 PM   #6
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A snap on toroid coil MIGHT help too, worth a try as Radio Shack sells then cheap and most stores stock them...

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Old 11-19-2014, 10:07 PM   #7
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I had the same problem. I bought a noise filter from Radio Shack. It was just a wire wrapped around a magnet. It did help.

I later switch from a wired connection to Bluetooth and that totally eliminated it.
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Old Yesterday, 05:43 AM   #8
Jnich77 OP
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Originally Posted by victor441 View Post
A snap on toroid coil MIGHT help too, worth a try as Radio Shack sells then cheap and most stores stock them...

Nice, I'll look into it today. Thank you.
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Old Yesterday, 05:44 AM   #9
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Originally Posted by sorebutt View Post
I had the same problem. I bought a noise filter from Radio Shack. It was just a wire wrapped around a magnet. It did help.

I later switch from a wired connection to Bluetooth and that totally eliminated it.
I wanna switch to Bluetooth, but I am cheap...lol.
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Old Yesterday, 10:48 PM   #10
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Google it. Lots of stuff on the web about this. This problem has been around in vehicles forever...ask any fiberglass car owner. There are caps you can install and other kits for sale. Good grounds are a must. Good luck.
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