GPS and speaker static

[hoochster]

This is for all you electronic wizards out there.

 

I have been running speakers on my RSTD through an MP3 player for a few years now with no issues. I still have no issues with my MP3 Player. It is hard wired using two RCA jacks from the amp to a headphone jack.

 

I recently bought a used Garmin 765T and when I tried it yesterday by plugging it into the speakers there was constant static ( I call it static, not sure if that is the correct term). As I twist the throttle the static increases. Any ideas or how to correct that? I would like to be able to use it for music when I need my GPS so I don't have to use my bluetooth helmet comms set when I use the GPS.

[BratmanXj]

You'd need to put a Ground Loop Isolator on the audio side...

http://www.amazon.com/PAC-SNI-1-3-5-3-5-mm-Isolator/dp/B001EAQTRI

 

I think there is a filter you can put on the 12v side, but I don't know of a model or what to search for off the top of my head.

[videoarizona]

Yep....a filter on the 12volt line feeding the GPS should take care of the ignition noise.

[djh3]

So I have to take a poke here. If your running it via rca jacks you must have an aftermarket amp your using. I have a 765t and use a y cable thru the aux port. Only time I get bad whine is if I got the IC turned up. I dont know why, but the intercom turned up I get a whine thru speakers.

[hoochster]

@BratmanXj Well at least I know what to look for. I don't like the version that I have to put to the GPS because then I would have that item just hanging out all over the place from my GPS. I guess I will have to look into one that connects to the battery side so it can be hidden and I don't have to worry about it scratching the pain or anything hanging out. @videoarizona sounds like you are saying there is a device I put right inline with the poser cable from the amp to the battery. That just seems like a better option. @djh3 you are correct it is an aftermarket amp. I have an RSTD so I don't have the fairing with the stereo.

If anyone knows a good product for this please share.

[djh3]

Ah dough. I guess I didnt read TD. I would say its probably ignition noise on power side. something like this on the power side of amp. http://www.sears.com/pyramid-10-amp-in-line-noise-suppressor-ns10/p-SPM12430401919?hlSellerId=10144772&sid=IDx20110310x00001i&kpid=SPM12430401919&kispla=SPM12430401919&mktRedirect=y

[videoarizona]

[djh3]

I had to install a couple on some of my yesteryear cars. Back when you would get alternator whine, or could still run solid core spark plug wires on high performance cars.

[videoarizona]

Yep. Brian....most of the time ignition noise making it into the audio circuits is from: noise on the power line (amp doesn't have very good circuits to filter it out), poor grounds, unshielded speaker amp circuit, etc..

 

The power and charging circuits of a bike is rudimentary...without much shielding as well....so audio noise on the 12 volt lines is a given. You will get rid of most of it with a good filter...but I would expect some left over. On both of my Ventures, there are at least two filters in the circuits and I still hear ignition noise on the intercom at certain volume. No biggie.

Good luck!

david

[hoochster]

Well I ordered the piece today. Hopefully it is easy to install. @djh3 thank for the link! I will update later. If anyone can tell me how to actually put it on that would be cool.

[djh3]

Should have instructions. But the one in the pic black-good ground, blue is power to radio/amp and the red from the gizmo goes to power wire of unit. Now the one you get may have different color scheme, but same idea. I installed on on a power amp converter thing I installed on mine for the GPS/aux input. I used a Boostaroo and made a power converter so the 3.5v unit would work off 12v.

[hoochster]

Got the unit in. I installed it and guess what, no more NOISE!! Thanks for the info all. You all always know what is up!! I didn't connect the ground because I couldn't really find a place to ground it and it still worked. Thanks again!

[djh3]

Where have you got it installed? Then maybe we can point you in a direction to ground.

[hoochster]

I installed it under the seat because that is where the amp is located. It is behind the battery leaning against the frame (the amp that is).

[djh3]

Heck just run you a wire over to the battery to ground it.

[hoochster]

To the negative post? One wire of the suppressor is already connected to the positive of the battery. If that is the case that will be easy!! I never realized that is considered a ground (if that is the case).

[djh3]

Pretty sure Should have had power wire into unit, a power out and the other wire (probably black) has a ring on it maybe. Should ground out. No instructions with part? Whats it look like?

[hoochster]

Sorry for not responding sooner but I was moving and it was a pain!! Anyways, I was finally able to get back to this and took some pics. I hooked the negative up to the negative side of my battery. This is where it is sitting as of now. The negative wire on the suppressor have a ring on it but it was to small to fit the screw through so I just tighten the screw down on the post. I'm hoping that works.

 

On a separate note, You can see the amp in the pics I took. With the amp in that spot the front of the seat actually sits up from the tank. I tried to slide the amp further down but was unable to. The plastic behind it that help separate the fender from the area didn't have much give. Any suggestions for a different place for the amplifier?? There doesn't seem to be much room on the RSTD to put things.