How to Choose a Soldering Iron. Main Types

The best video i've Ever seen about soldering iron

totally useless. what the hell is that yellow thing.

I'm using a temperature-controlled Oryx iron, bought in S. Africa about 55 years ago, that has lasted me till now - though I'm going to have to replace it because the tip is corroded and I can't get tips for it any more.

I use 40 w

Probably the wrong one...

I have a 40 watt goot soldering iron that is made in japan

Amazing

Hi, Electronics Technician here. Let me give you some feedback. First, use the proper flux. Use plumber's flux on plumbing, not electronics. For electronics you want to use no clean, rosin or resin. Next use the proper solder, either tin-lead or lead free. SAC305 makes crappy solder joints IMO however SN100C is pretty good and less expensive than SAC305. Electronics solder generally has a flux core. Speaking of flux, please don't teach people the bad habit of dipping the iron into flux. If you dip into anything it should be tip tinner/cleaner. Then immediately add solder to the tip to flush away the nasty residue from the cleaner. Next, add flux to your work, not your iron. Put the tip of the iron on the work to heat it up and feed solder into the joint area (such as PCB pads). Yes you can transfer solder (tinning the iron and transferring to the joint) but I typically reserve that for lap soldering wires which the insulation could easily melt. And if you can't get the solder to melt, you should try a tip with a larger mass and/or heat the region with a heat gun on low or hairdryer on high. I'd use a board heater but I realize most people don't have access to one.

Yea, well, when I started I needed, if taking into account recommended wattage, 20 W
It wasn't strong enough.
Then 40 W
It also lacked heat.
Now I will take 100 W for jobs that are claimed to be for 30 - 60 W. 2 pounds heavy.

I use a cheap t12 soldering iron with 80 watts, pretty good for pretty anything

what if i used 60W soldering iron for boards and converters on the board. also wire that installed on board ?