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Ohm's law? Answered

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so, i have a broken soldering iron, and i want to fix it

can someone =smart= calculate the required resistance of wire at 120v ac
i don't care about the amperage, as long as its under 2 amps

please give me a range of resistance, i don't like to trip fuses, (my parents hate that!)

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gimmelotsarobots (author)2008-07-02

I had a 40W Weller burn out on me once. It overheated.

It was glowing from the heat...

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i left my iron on for a couple hours (not before it broke) the tip was glowing slightly red, very, very dimly the little grip was getting painfully hot, so i insulated it with double sided (sticky) foam, and electrical tape

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Big Bwana (author)2008-06-30

60 Ohms is 2 amps but that is 240 watts. more then most soldering irons, unless your soldering pipes... Most small irons are in there 25 to 40 watt area 576 to 360 Ohm area....

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NachoMahma (author)Sandisk1duo2008-06-30

. Keep in mind that the impedance will be higher than the resistance. How you wind your coil will determine how much difference. Even 360 ohms resistance _may_ turn out to be too much impedance. May not make enough difference to matter. . And make sure you use the right type of wire/insulation for the high temps you'll generate.

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Sandisk1duo (author)NachoMahma2008-06-30

impendence? i'm not familiar with that term, i though impendance was/is resistance

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Big Bwana (author)Sandisk1duo2008-06-30

What type of iron are you fixing ???

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Big Bwana (author)Sandisk1duo2008-06-30

Does it have a base station, and if so is there temp controls on it ?? or is it a straight 120 volt plug in iron ??

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Sandisk1duo (author)Big Bwana2008-06-30
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Big Bwana (author)Sandisk1duo2008-06-30

The one I fixed like that had a broken wire right where is goes into the handle of the iron, and thats where is flexes a lot....

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Sandisk1duo (author)Big Bwana2008-06-30

well, the thing is, there is a light, that shows when it's on, and the light lites up! and a kind of took it apart already

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Big Bwana (author)Sandisk1duo2008-06-30

If it's the heating element what ever fixes you do will be temporary if you can open the heating element to start with, I ve only pulled apart dollar store ones to that level for the ni-crome wire to make hot knifes with for cutting Styrofoam and they pull apart and there is a ceramic tube wrapped in wire with one going down the center and one coming off the bottom of the wrap and then there was a second ceramic tube over the top and it slid into the metal soldering iron, But I don't know if weller is the same or not ....... Are you getting any resistance across the heating element ?? and or is it shorting to the case ??

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Sandisk1duo (author)Big Bwana2008-06-30

The heating element is OL so, i guess it's dead : ( What? soldering irons from the dollar store? You mean hot glue guns? Oh ya, i don't have a sponge for my soldering iron, so i just hit on the side of a ceramic cup to get rid of the solder, it works, but i didn't expect this result....

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Big Bwana (author)Sandisk1duo2008-06-30

They have soldering irons, for a buck at the dollar store by me,they are nice if you ever have to cut plastic and don't feel like cleaning a good iron, and honestly they work pretty good, I've found they get a bit hot for smaller things so I use a light dimmer but if your quick they are fine with out it...... And if they stop working the most common problem I found is the super thin gauge of wire they use falls out of the screw terminals on the back of the heating element, takes longer for the iron to cool so you can touch it then it takes to fix them .....

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Sandisk1duo (author)Big Bwana2008-06-30

well, i live in CA, maybe its because the US economy now SUCKS, or maybe its because of what state i live in. the best the dollar store sells is hot glue guns, and usb cables.... the inside of the weller was filled with ceramic caulk, or something of the sort

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