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Old 20-09-2016, 09:31   #1
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Looking for a low noise 12v USB charger

I'm looking to install some bulkhead mounted USB chargers, like the Blueseas one below. Some of the reviews of it complain about RFI on SSB frequencies. I don't want to add anymore RFI to the boat. Anyone know of a good low RFI charger?
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Old 20-09-2016, 09:54   #2
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Re: Looking for a low noise 12v USB charger

I am not trying to be cute, but install a cigarette lighter receptacle and then plug in a dual USB charger, unplugged of course it won't be noisy. You can then use it for other things like charging a handheld or whatever else uses a cigarette lighter plug.
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Old 20-09-2016, 10:46   #3
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Re: Looking for a low noise 12v USB charger

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Originally Posted by a64pilot View Post
I am not trying to be cute, but install a cigarette lighter receptacle and then plug in a dual USB charger, unplugged of course it won't be noisy. You can then use it for other things like charging a handheld or whatever else uses a cigarette lighter plug.
I already have a number of them. They all end up dying after awhile or end up making poor connections to the cig lighter. Its less of a mess if there was a built in outlet.
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Old 21-09-2016, 09:44   #4
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Looking for a low noise 12v USB charger

We have a blue sea cig plug in dual USB charger and have been using it for a couple of years. no SSB interference at all. Never had any issues with it becoming loose or breaking the connection with the cig lighter receptacle

I did see a combo 110v wall outlet that contained two USB plugs. Google Hubble USB receptacle. These replace the normal wall receptacle but then you have to have 110v running to it. I like the 12v solution as I don't need the inventor to be on.


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Old 21-09-2016, 09:52   #5
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Re: Looking for a low noise 12v USB charger

I have 5 lighter receptacles, one in the bow and one in cockpit, one at the Nav desk and I have installed two in the fwd Stateroom to run our CPAP machines.
The one in the bow and cockpit I think were factory installs, if so that makes them 30 yrs old and they work.
Lighter receptacles are bad about what you plug into them not keeping a good contact, and contrary to what you would think, I don't think you can pull significant amps through them, things like portable coolers are better off using a "real" plug etc. But for USB chargers I have found them to work fine, the one beside the chart table I have a four USB charger plugged into it most of the time, and when we are away from the boat I plug in an air Purifier, something that I feel I may have wasted money on, I don't think it does much really
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Old 21-09-2016, 10:02   #6
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Re: Looking for a low noise 12v USB charger

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Originally Posted by chouliha View Post
We have a blue sea cig plug in dual USB charger and have been using it for a couple of years. no SSB interference at all. Never had any issues with it becoming loose or breaking the connection with the cig lighter receptacle

I did see a combo 110v wall outlet that contained two USB plugs. Google Hubble USB receptacle. These replace the normal wall receptacle but then you have to have 110v running to it. I like the 12v solution as I don't need the inventor to be on.


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Is it the unit I pictured above?
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Old 21-09-2016, 11:15   #7
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Re: Looking for a low noise 12v USB charger

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Is it the unit I pictured above?

Hi Paul. No it's Blue Sea Model 1017.
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