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Old 12th May 2021, 21:38   #11
neilbaker86
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Make sure the wire you are soldering isn't tarnished too.


Copper that has gone dark wont take solder. It needs to be bright and shiny.


You can dip it in vinegar for 10 mins or so before hand which usually removes the tarnish. Then put some flux on it before soldering with a 60/40 solder. Lead-free is harder work for beginners.
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Old 14th May 2021, 20:12   #12
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Use a decent temperature-controller soldering iron, decent brand solder and lots of flux.

Having said that a lot of wire these days is awful quality.
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Old 15th May 2021, 10:22   #13
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Quote:
Originally Posted by COLVERT View Post
You need to use flux or a solder with a flux core.--This cleans the part to be soldered and make the solder free flowing.

Without it soldering becomes difficult.

Bit like trying to wash your face with a bar of soap but no water.--
Absolutely correct, flux is very important in both soldering and de-soldering, without it it's harder, as I found out recently trying to solder three small resistors ndext to each other.
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Old 18th May 2021, 18:17   #14
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Default Improved soldering

Ok, I had some time last weekend and did some testing, having obtained some new solder. I dug out my old soldering iron, which I retired as the cable was getting too short (shortened by me a couple of times due to heat damage).

I cleaned my newer and old irons off, and tried both. I found my soldering improved, whichever solder I used with the older iron. I suspect it produces more heat. I’ll just have to use it with an extension! I’m also toying with getting separate flux. The solder is supposed to have a core of it. Is it worth getting a separate tub of flux as well?
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