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2019-06-23 Ground Loop Isolator (BlueTooth)

dcarver's picture

published by dcarver on Sun, 06/23/2019 - 13:25

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2013 Yamah FJR 1300

Been hearing horrible whine in earbuds when BlueTooth is working AND Sevina's are on. Almost a screaching sound.

Coming from the Valentine radar detector audio output that feeds the Sena SM10 bluetooth transmitter.
Only screeches when the SM10 is powered from bike power. First powered SM10 from voltmeter/USB combo junction then powered directly from battery. No change in screech.
So was running the SM10 from an external rechargeable battery. That stopped the screech.
Hmmm. GroundLoop problem?
Installed a ground loop isolator on the audio out from Valentine and audio in on SM1o.
MAGIC!

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2020-06-23 Doesn't work all the time

Permalink Submitted by dcarver on Wed, 06/24/2020 - 12:17.

Sadly, it isn't or wasn't a real fix. Intermittently it comes and goes now..

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