Shielding cables from each other and other noise

[bogan]

Something similar to this: http://www.sonicelectronix.com/item_...C-CSS-100.html

Sounds like you might have a ground loop between the devices on the audio channel, how close to the power wiring does the audio wiring from the GPS to the AMP run?

I got this effect really bad when my laptop was plugged into it's charger and mains speakers, the closer the power wiring is to the speaker wiring, the less feedback there is.

Quick check for it, plug an mp3 player into your amp at the gps end (assuming its a standard 3.5mm plug), if its ground loop, the ungrounded mp3 player won't have the whine.

[banditrider]

Sounds like you might have a ground loop between the devices on the audio channel, how close to the power wiring does the audio wiring from the GPS to the AMP run?

I got this effect really bad when my laptop was plugged into it's charger and mains speakers, the closer the power wiring is to the speaker wiring, the less feedback there is.

Quick check for it, plug an mp3 player into your amp at the gps end (assuming its a standard 3.5mm plug), if its ground loop, the ungrounded mp3 player won't have the whine.

Hmmm, that could possibly be it. From memory (I pulled everything out a while ago) I had extra length in either (or maybe both) the power supply and the stereo cable between the GPS and amp. The whole lot was then tidied up inside the glove box on the bike so it's possible everything was packed in pretty closely. Do ya reckon I should take the filter thingee outta the system?

I could also try my Ipod through it too...noise tended to change in pitch/volume with revs of the bike...

[bogan]

Hmmm, that could possibly be it. From memory (I pulled everything out a while ago) I had extra length in either (or maybe both) the power supply and the stereo cable between the GPS and amp. The whole lot was then tidied up inside the glove box on the bike so it's possible everything was packed in pretty closely. Do ya reckon I should take the filter thingee outta the system?

I could also try my Ipod through it too...noise tended to change in pitch/volume with revs of the bike...

Yeh does sound like that is the issue, the loop will be acting like an antenna and picking up interference from the coils or stator which change frequency with the revs.

I got some filters from Jaycar which fixed my laptop ground loop issues, you're welcome to try/borrow it as I don't use it anymore.

But I think the main problem is both of you guys have too much crap on your bike! I mean a glove box for gawds sake

[banditrider]

Yeh does sound like that is the issue, the loop will be acting like an antenna and picking up interference from the coils or stator which change frequency with the revs.

I got some filters from Jaycar which fixed my laptop ground loop issues, you're welcome to try/borrow it as I don't use it anymore.

But I think the main problem is both of you guys have too much crap on your bike! I mean a glove box for gawds sake

Oi! Glove boxes are very useful!

Cheers for that, I will have to have a muck around with it again at some stage - will let you know how I get on...

[Gremlin]

But I think the main problem is both of you guys have too much crap on your bike! I mean a glove box for gawds sake

I would just like to state for the record I don't have a glove box!



I don't think there is too much crap there... BMW put a 720W alternator in the bike, gotta be used somehow

[caspernz]

But I think the main problem is both of you guys have too much crap on your bike!

Not being supportive here of course...but bogan said what I was thinking...any more farkles and you'll be in a car!

[gijoe1313]

I've been dealing with Gremlin's unique propensity to install the kitchen sink, kit and caboodle and all manners of gee-gaws, gimcracks and whatchamacallits for ages. I do recall accusing him that his wiring requirements would rival a four wheeler with all the farkle!