"Master TV" wrote in message
om...

| A cold solder joint is when the part being soldered was not heated
| enough for the solder to grab on to it properly.

I spent 30 minutes watching a skilled tool and die maker try to resolder the
radiator from his car with more and more heat and failing each time. I
finally asked him to let me try. I carefully cleaned all the parts, using
wire brushes and acid flux and washing it all thoroughly afterwards, a
process taking over 15 minutes. I then soldered it in less than 10 seconds.

It isn't just heat that does the job. It's a combination of materials,
cleanliness, flux and heat. I've soldered everything from litz wire to bus
bars and preparation is the key.

BTW, if you want to test your soldering, try soldering pieces of flux cored
wire solder together. If you are really good you can build your own mini
Eiffel tower.

N