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Step 3Solder the jumper to the board.
Poke your tinned jumper end through your PC board.
Clean and tin the iron tip.
Again, hold the iron on the opposite side of the wire as the solder. Briefly touch both iron and solder to the base of the wire.
A good solder joint is shiny. If yours is foggy or dull-looking, you've got what's called a cold solder joint. This is bad. It's weak and has poor electrical connectivity. Either your iron wasn't hot enough, or you need to clean the tip, or you took too long to solder that sucker. Try melting down the existing solder again.
The solder joint should also not have too much solder. A little volcano-shaped hill all around the base of your wire is a nice "fillet" joint. A bulging, rounded hill is bad, as is a spot around the base with no solder.
Clean and tin the iron tip.
Again, hold the iron on the opposite side of the wire as the solder. Briefly touch both iron and solder to the base of the wire.
A good solder joint is shiny. If yours is foggy or dull-looking, you've got what's called a cold solder joint. This is bad. It's weak and has poor electrical connectivity. Either your iron wasn't hot enough, or you need to clean the tip, or you took too long to solder that sucker. Try melting down the existing solder again.
The solder joint should also not have too much solder. A little volcano-shaped hill all around the base of your wire is a nice "fillet" joint. A bulging, rounded hill is bad, as is a spot around the base with no solder.
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Sep 26, 2009. 7:51 AMBFeely
says:
Lead free solder may have a dull finish. It should still have all the other qualities of a good solder joint.
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