Originally Posted by
Duster_360
Think you may be concluding the esc has higher temp solder cause your iron can't melt it when its really just the iron. The mass of what you're soldering affects how much heat gets to the solder vs pulled away to heat the entire object up.
Try a higher wattage soldering iron with a good sized chisel shaped tip.
Absolutely right, the solder that R/C manufacturers use is no different than what most electronics manufacturers use(I should know because I've worked in the electronics industry for over 15 years). Really all you need is a decent solder like Kester's 63/37(which is what we use where I work building sensor tools that are used in mine shafts), a good iron(I'd say 40watt bare minimum with a big chisel tip that can transfer the heat very quickly, & more wattage helps even more) & some practice, & you'll have solder joints that will NEVER break down in normal use....
