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  • This kind of sounds like whatever was on the tip had oxidized severely over the intervening 40 years. So when you applied heat it couldn’t conduct very well, so it got hotter and hotter until it had an uncontrolled thermal expansion. This just comes down to especially with older equipment, making sure the device is clean, and if you apply heat be careful especially on the first startup.





  • jet@hackertalks.comtoCool Guides@lemmy.caA cool guide to soldering
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    1 month ago

    Check the documentation for your soldering station, if your soldering station doesn’t have any documentation you can go with the melting point of the solder itself plus some overhead.

    But as illustrated below, it can get a little complicated, if you’re doing a lot of soldering with the same solder you’ll experiment and figure out what’s good for you

    Ideally you want to use the lowest temperature you can get away with, using too much temperature can potentially shorten the lifespan of your soldering tips, and potentially damage the printed circuit board.

    Get a testing board, any old board will do, and do some soldering and desoldering at different temperatures.

    https://kb.hakkousa.com/KnowledgebaseArticle10297.aspx

    lets look at the melting points of common solders:

    • Tin/Lead (Sn63/Pb37) - 183°C
    • SAC 305 (Sn/Ag3.0/Cu0.5) - 220°C
    • SN100 (Sn) - 232°C

    Now let’s add the 50°C we need for making a good soldering connection:

    • Tin/Lead: 183°C + 50°C = 233°C
    • SAC 305: 220°C + 50°C = 270°C
    • SN100: 232°C + 50°C = 282°C

    We now need to consider the type of soldering station we are using…Soldering Station which has very good performance, we should add approximately 100°C as the heat reserve for quick thermal recovery.  The resulting temperature settings are:

    • Tin/Lead: 233°C + 100°C = 333°C
    • SAC 305: 270°C + 100°C = 370°C
    • SN100:  282°C + 100°C = 382°C

  • jet@hackertalks.comtoCool Guides@lemmy.caA cool guide to soldering
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    1 month ago

    Clean everything with a board cleaner/alcohol.

    Use a heat gun for the stubborn things.

    Solder wick is fine, but if it’s a through hole on a ground plane your going to be there a really long time.

    Use the least amount of heat you can get away with.

    Sometimes adding fresh solder on top of the old solder helps the heat spread so you can use the wick more effectively.

    Constantly use fresh wick, and if it’s really stubborn dip your wick in extra flux.

    Desoldering guns are awesome, but a little spendy.