First of all, the failure to use a matching extra flux which matches the core of the solder you are using is a big no no. You need to start with a very clean board to start with. The extra flux helps you with heat dissipation and you get a better solder joint. From the looks of the video that first solder attempt wasn’t up to temp. It hurt you not having any extra flux that didn’t match the solder’s flux core. Why waste solder or flux if you don’t know how to solder in the first place. Soldering basics are different for different skill levels mind you. I am a critical circuit solderer so it is vital to first have a clean solder surface, wire, leads prior to soldering. Few lead free configurations achieve what Kester 282, a premium leaded solder will achieve. I just haven’t come across any that can achieve it’s ability to flow and achieve it’s appearance, ability to withstand G forces, mechanical and physical stresses, thermal inversions and performance in real world applications. Some solders are just better and a true eutectic which only has two states used with its extra flux, 186, a liquid flux which matches both chemically and generally the flux core of 282. It just hasn’t been surpassed. I know it is a lead based solder, but it is the best performing solder you can use and there are equivalents made by AIM and Alpha Metals. I also can endorse fully Multicore solder with 2% silver content in a pure eutectic configuration. It is 62% tin, 36 % lead and 2% silver solder. No lead has made gains in these years since its introduction, but I cannot endorse it without reservations.
Or you can put the tip inside acid, like the one used to remove calcium deposits from showers and the quicly covering the tip with tin. 10 secs at most
Any use of silicon carbide 'sandpaper' even with finger pressure is a dumb way to be cleaning soldering tips. Learn what you did wrong first to cause it a problem large enough that you think that this level of cleaning perhaps might help. Never use steel wool or sandpaper.
По моему у него жало паяльника огромное... да можно использовать паяльную пасту. Но это дорого. Всё как-то оч грубо, не соответствует масштабу процесса. Поменьше надо и поаккуратнее...
