A big tip o’ the hat to Chris N2YYZ for passing along a new-to-me technique for soldering tiny SMD parts.
I’ve heard of the hot air flow method and the heat-it-in-a-skillet method with solder paste as well as a few other techniques but drag soldering? That’s a new one on me and I must say, it looks impressive.
I’ve never heard this method mentioned in all the reading of various groups over the years so maybe it’ll be new to others as well.
As Chris says, the flux does all the work for you as far as keeping the solder contained to where it’s needed. I wish I’d known about it prior to those tiny chips I just finished soldering old school but now, sure as the sun comes up in the east, I’m going to be shopping for a new kit just to implement this method. Thanks Chris – just what I needed!
There are several videos on YouTube and elsewhere of soldering SMD chips with solder paste by squirting the paste across the pins of the chip – I know it works but it seems counterintuitive to me to purposely spread conductive solder across pins. I don’t think I could bring myself to do it.
But gel flux? Seems safer and accomplishes the same thing via a different method, even though the physics is the same in how the solder bonds to where it’s needed and is wicked away from where it’s not.
Enough talking – check out the video, courtesy of Howard Electronic Instruments: