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Soldering Tips required

Discussion in 'Home Cinema Building DIY' started by Mike Swannick, Oct 2, 2003.

  1. Mike Swannick

    Mike Swannick
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    I need to try and make up a cable (9 pin D to 2.5mm stereo jack). Previously I have suffered no problems making up small Maplins kits and making up audio & MIDI cables, however, these new cable components are of a similar size but I just can get the little f******s to stick together. I'm sure I used a 15w iron for the other (audio & kit) stuff, but the one I have now is 30w. The solder seems to take too long to melt, then dries and goes crumbly almost immediately with a dull surface, not shiny like recently melted lead. These are problems I didn't experience before.

    Is my iron too hot?
    Is the solder too thick?
    Is the solder the wrong stuff?

    I was considering one of the Maplins own irons either 15 or 20w.

    Any help appreciated.
     
  2. Mylo

    Mylo
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    I use a 45 watt temp controlled iron set at 400C and 22swg 60/40 solder. The solder has a none corrosive flux. This set up serves me well building and repairing Military circuits. I clean the tip daily using 'Tip Cleaner'.

    When soldering, do you heat the component leg and the circuit pad together before applying the solder. Both have to be hot before solder will flow. The same applies to wire and pins except less heating is required. Sorry if this is teaching you to suck eggs.

    Mylo :)
     
  3. LV426

    LV426
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    Again, sorry if this is sucking eggs, but the best technique for soldering is:

    Heat up the first item (eg the wire) and coat it with solder.

    Heat up the second item (eg the plug) and coat it with solder.

    Put the solder reel away. Place the two items together and heat them both up, until the two solder coatings both melt and join.
     
  4. Mike Swannick

    Mike Swannick
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    Egg sucking lessons is what I probably need.

    When building kits I do use mylos method, and with my previous iron all was well.

    I've tried nigels method for the audio cables, again, with no problems, but now the time period where the solder remains liquid can be measured in milliseconds where as before it was fine. The solder I'm sure is to blame. Its not as though I'm trying to 'tin' 13amp flex or anything. The plastic insulation between the stereo jack poles is showing heat damage too . I'll try different solder first.

    Cheers.
     
  5. Mylo

    Mylo
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    Does the tip on you iron show a build up of flux after use?
     
  6. Mike Swannick

    Mike Swannick
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    I'm not sure that my current solder (about 22swg-ish) has flux in it. What does flux build up look like?

    I've bought a new 18w iron and solder today amd shall be testing in a few minutes time.......
     
  7. Mylo

    Mylo
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    Dark brown, build up, bit like burnt caramelised sugar. Are you using a separate flux then? If not new solder it is then.
     
  8. Mike Swannick

    Mike Swannick
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    New solder it was!!

    All done and dusted. I've now got a 18w iron to hang up next to my 30w iron ready for my next soldering job......in about 3-4 years time!
     
  9. nathan_silly

    nathan_silly
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    If humans were meant to solder, we would have been given three arms! :)
     
  10. Mylo

    Mylo
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    All right Nathan, who told you !:mad: :D
     

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