What's causing radio static when battery charger is on?

[MI_LkStClair_SDA260]

Hope someone out there can help.

When I'm docked and plugged into shore power, my FM radio has lots of static with the battery charger turned on. Soon as I turn off the battery charger, static goes away.

Any ideas?

 

[dwna1a]

This is a repost I found,

These are very difficult problems to solve.
*
*RF generated by the switching regulator in the charger causes the problem. *Since the charger is not a consumer product, it does not have to pass the same FCC certification as something you would put in your house – hence can interfere with other stuff. * The RF can get to the FM radio one of two ways – conductive through either the AC/DC power system or transmitted through the air. *To sort these outs use a test with a FM radio that does not use any boat power. *If it still happen, then the problem is transmitted. *If it does not, the problem is conductive.
*
*Possible solutions: *
*
*If it is conductive, you need to stop the RF for getting to the radio through the DC power or DC ground using inductors around these cables. *You can buy kits from auto parts stores that may work or take some off some old computer cables.
*
*If it transmitted, you have a much larger problem as you have to stop the RF from getting into the air either from the units or from the cable that connect to the unit. *For the units, make sure the case is grounded. If that does not work, place the unit in a separate grounded metal case with as few holes as possible. *For the cables, using inductors on them close to the units could solve the problem.
*
*Sorry there is no quick fix
*
*.

 

[annie]

This is a repost I found,

*If it is conductive, you need to stop the RF for getting to the radio through the DC power or DC ground using inductors around these cables. *You can buy kits from auto parts stores that may work or take some off some old computer cables.

These are called ferrite filters and quite rightly are on most computer cables. I used to get depth sounder noise coming through the radio. Measure your antenna cable diameter, there are heaps on EBa*.
I fitted 2, one at the radio end of the antenna and the other at the antenna end and it sorted the problem.

 

[tbirdvet]

Hope someone out there can help.

When I'm docked and plugged into shore power, my FM radio has lots of static with the battery charger turned on. Soon as I turn off the battery charger, static goes away.

Any ideas?

Had the same issue. I installed a ground loop isolator on each amp and issue fixed. Install this one:http://www.amazon.com/PAC-SNI-1-SNI...9746586&sr=8-13&keywords=ground+loop+isolator