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What's with this PCB?

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vne147

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Hey everyone. A friend of mine sent me this picture asking what's with all the lines. My best guess is that they are acting as some type of filter but honestly, I have no clue. Can anyone shed some light? Thanks!
 

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crutschow

Well-Known Member
Most Helpful Member
The solder would also reduce the electrical resistance of the traces.
 
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