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Soldering trouble

Discussion in 'CB Radio Modifications' started by 338_MtRushmore, Jul 7, 2018.

  1. 338_MtRushmore

    338_MtRushmore Well-Known Member

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    I was trying to replace some components in a radio, but as soon as it gets hot enough to melt solder it starts melting the circuit board. I'm not sure what I'm doing wrong. Maybe I'm using too much flux?



    20180706_194032.jpg
     

  2. nomadradio

    nomadradio Analog Retentive

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    Maybe this guy needed that iron. Looks like the one he used required 'sculpting' the solder instead of melting it.

    [​IMG]

    This is where he attached the hot side of the "ping" capacitor.

    [​IMG]

    The rest of the radio has more of these. Just hope we don't miss any of them. When someone tells you the radio's capacitors have "all been changed", it pays to have a look-see first.

    73
     
  3. unit_399

    unit_399 EL CAPO

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    Looks like he used solder for plumbing instead of solder for electronics. Or the wrong kind of flux.

    - 399
     
  4. nomadradio

    nomadradio Analog Retentive

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    Or, almost enough heat, but for long enough to burn away all of the flux?

    At least I didn't smell any zinc chloride when the iron touched it.

    73
     
  5. 338_MtRushmore

    338_MtRushmore Well-Known Member

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    All the ladies say it's too big, but I'm not sure? Seriously though, what would an iron like that be used for? Sheet metal and radiator repair are all I can think of, but a propane torch would work better for those I would think. Any ideas?
     
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  6. nomadradio

    nomadradio Analog Retentive

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    Stained glass?

    The lead they use has a higher melting temperature than tin/lead solder.

    Takes heat to melt the formed lead channel onto the glass edge, too.

    Or making a copper whiskey still with lead-free solder?

    73
     
  7. Grinder74

    Grinder74 KE8EOJ

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    I watched a show where they used old school heated irons like that to do copper roofing. Was cool to watch.
     
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  8. StrangeBrew

    StrangeBrew Sr. Member

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    I've seen these used for roofing as well, also for fancy copper gutters and such. Mostly for restorations on historic buildings.
     
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  9. Tallman

    Tallman W9WDX Amateur Radio Member, KW4YJ EXTRA class

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    It is used for copper and other sheet metal work. Need lots of heat for sheet metal work, it conducts heat away from the joint you are trying make.
     
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  10. Shadetree Mechanic

    Shadetree Mechanic 808 On The North Side of Dover

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    My grand mother once told me that when my grandfather was building the house they didn't have big electric irons like that. The irons they used for the copper gutters and downspouts had to be heated in a fire pit in the yard and the guy tending the fire would toss a hot one up to the guy on the roof when needed. I would love to have seen that.
     
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  11. PoDuck

    PoDuck Active Member

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    I have an iron like that, although not as big. I have never used it, but I got it because of running into situations in the past where I couldn't get enough heat to solder/desolder on large pieces of sheet metal.
     
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  12. 338_MtRushmore

    338_MtRushmore Well-Known Member

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    I will have to fire it up some time just for fun. I assume it runs off of propane?
     
  13. 357magnum

    357magnum Well-Known Member

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    If all fails that would be a great piece to put under the seat of you Car/Truck , Police stop you .... Hey I'm an outdated plumber ! That thing would hurt !:LOL:
     
  14. Tallman

    Tallman W9WDX Amateur Radio Member, KW4YJ EXTRA class

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    That would make an interesting Stabbing Weapon. Wound them and cauterize in one step.
     
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