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Soldering on a Circuit board
3/16/2009 8:41:49 PMJesse Hancock
Here's a question IM sure at one time or another someone had to answer for some of you. This weekend I started the second project radio, The emerson as listed in a earlier post. NOW, when I desoldered, a couple of the wires I noticed that the silver (Conductors)? came out with the wires, the solder on these is quite thick, and needlees to say the question is.. Do I need to salvage these? Or can I simply purchase others? Or would it hurt to solder directly to the board? Can someone help me?
3/16/2009 10:10:45 PMWarren
As long as there is no feed through to the other side of the board for any other conections, I don't see any problem with soldering a new wire to the board.
3/17/2009 5:48:45 PMDoug Criner
If you use a soldering iron with too much wattage, it's very easy to delaminate the copper traces. Best to use a pencil iron of maybe 15W or so.

Once a trace is delaminated, you can replace it by jumpering with a wire. I use 28 gauge wire-wrap wire for that purpose. You can flat-wire directly to a trace after first tinning it. Or, you can solder to a pad. Best to hold the wire steady with a clamp or clip while soldering.

Fine wire is easier to solder with a minimum amount of heat.

I would try to avoid desoldering connections to a printed ckt board. The heat required to desolder is likely to be too much for the traces. Better to just snip the original wire or component from the the board, and haywire a new wire to the old connection.
Doug



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