Soldering Stranded Wire

Discussion in 'General Electronics Chat' started by daroc26, Jul 24, 2009.

  1. daroc26

    Thread Starter Active Member

    Apr 4, 2009
    30
    0
    Hi,

    Does any one have any tips about soldering stranded wire to a lead on a board? I have to cut and strip an audio cable and then solder the wires to the board.

    When I've tried to solder components with stranded wire leads, it's always a mess and the joint never holds.

    Any ideas?

    Thank you!
     
  2. Mike2545

    Active Member

    Mar 26, 2009
    116
    3
    Make sure you use good quality solder and flux, It sounds like you may not have enough heat and are making 'cold' solder joints. It is also helpful to twist the strands of wire together and pre-tin them.
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    If it's a round pad, tin the wire and use pliers to form the end into a rough circle. Tin the pad (apply a light coating of solder) and use the iron to press the wire down on the pad. Add more solder if you think it's called for.

    The joint should be shiny and rounded. If the metal is dull and spiky, it probably needs more heat (larger iron) or more flux.

    Solder has poor mechanical strength, so don't expect it to withstand more than a light tug. You may need to arrange a strain relief to insure the attached wire does not come loose.
     
  4. someonesdad

    Senior Member

    Jul 7, 2009
    1,585
    141
    Also be careful of too much heat, as you can delaminate a PC board trace. You mention a "lead", so you may not mean a trace. Still, even soldering to a wire that's attached to the board can lead to things delaminating if there's too much mechanical movement or heat.
     
  5. bertus

    Administrator

    Apr 5, 2008
    15,649
    2,348
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