Assistance from Electronic Wizards!


Technical information and Q&A applicable to all years and models of Goldwings
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Nicksacco
Posts: 23
Joined: Sat Jul 18, 2015 5:36 am
Location: Bahama,NC
Motorcycle: 1978 Goldwing, 1989 Goldwing, 2012 Goldwing Level 3, 2003 ST1300, 1976 Suzuki RE5, 2002 Suzuki DRZ400E

Assistance from Electronic Wizards!

Post by Nicksacco »



Hi All-
I hope you can provide me some insight on this strange audio problem.
I have installed:
--XM radio
--Garmin Nuvi
--2 channel audio mixer
--Bluetooth
--Ground loop isolator

All works well except when the Nuvi talks, the sound is distorted - barely audible.
This only happens if the Nuvi is running on bike power. If I unplug it's power cable - sound is no problem.

All electronics are operating on bike power through 12V to 5V converters except the mixer which is 12V.
I have run things straight from the battery also thinking somehow the bike's electronics had an affect - but makes no difference.
I've even run things from a totally separate battery.
I have included a block diagram to help.

My suspicion is that the Nuvi's output impedance is way off when on bike power but don't know if that is possible.

Does anyone out there have an idea??




Ride often and long!
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DenverWinger
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Location: Denver, CO
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1980 GL1100 STD Vetter (2005-)
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1972 CL350 (1980-1988) sold
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Re: Assistance from Electronic Wizards!

Post by DenverWinger »

Ground loop from the common power supply.

I'd put another ground loop isolator between the Nuvi and the mixer. Should be able to run on bike power then.
There are 10 types of people in the world, those that understand binary numbers, and those that don't. :lol:

♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:
~Mark
User avatar
Nicksacco
Posts: 23
Joined: Sat Jul 18, 2015 5:36 am
Location: Bahama,NC
Motorcycle: 1978 Goldwing, 1989 Goldwing, 2012 Goldwing Level 3, 2003 ST1300, 1976 Suzuki RE5, 2002 Suzuki DRZ400E

Re: Assistance from Electronic Wizards!

Post by Nicksacco »

I have another isolater so I'll give that a try!

Thanks for the idea.
Ride often and long!
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