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Old 09-27-2011, 02:38 AM
jmangan jmangan is offline
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Join Date: Aug 2011
Posts: 6
Unhappy Now out of my depth.

By USB charger I meant the cable that comes with the device (in the UK) that allows you to connect to a PC and transfer files. That cable also supplies current to the D3 to charge up.

I've also got a small device which plugs into the 12V socket in the car and has a USB socket at the other end which I haven't tried yet.

I'm afraid I haven't tried anything with an inverter but it sounds a rather inefficient way of doing things - converting 12V DC to 120V AC to feed a mains charger which then converts it back to DC.

My suspicion is that the noise is coming from the inverter and it should be possible to put some kind of filter in the inverter output to remove any 50/60 Hz hum but that's just my best guess. Sorry.
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