Old guy at the flea market taught me a lesson about solder joints

Last Saturday I had this beat up vintage radio on my bench and one of the solder joints looked perfect but the circuit was dead. A retired electrician named Frank walked by my booth at the flea market and saw me scratching my head. He said "son, a shiny joint ain't always a good joint" and showed me how to check for a cold joint by tapping it with a plastic probe. Turns out it was cracked at the base but looked clean on top. I've been doing this for 7 years and never knew that trick. Has anyone else had a random stranger drop a game changing tip out of nowhere?

4 comments

4 Comments

patriciareed25d ago

@terry_carter15 reminds me of when I was learning to weld and some random guy at the hardware store told me to wet the tip of the rod before striking an arc. Tried it and it worked perfect. No idea if it's in a book somewhere but it saved me a headache. Sometimes a tip is just a tip.

terry_carter151mo ago

Honestly, is it really that deep though? A cracked solder joint is pretty basic stuff you should've caught in your first year, not seven. Tbh, tapping with a plastic probe is just a common troubleshooting step, not some ancient secret from a flea market wizard. Ngl, it sounds like you're making this old guy sound like Yoda when he just showed you a technique from the first chapter of any electronics repair book. Maybe you were overthinking the whole thing and missing the obvious because you were too focused on how it looked. Glue sniffers at the flea market give out tips too, doesn't make them game changers.

parkera2225d ago

Have you ever had a tech just stare at a board for an hour before realizing it was a simple cold joint? I've seen guys with decades in walk right past the obvious stuff because they're so sure the problem has to be complicated. Sometimes the old book tricks are the ones you forget when you're deep in it, and a fresh pair of eyes whoever they are can pull you back to earth.

martin.felix1mo ago

@terry_carter15 You're not wrong that it's basic stuff, but that's kind of the point. Most people don't soak up every tip from every book, we just get the ones from life bumping into us at the right time. It's funny how the simplest wisdom always comes from someone who's been around long enough to stop assuming everyone already knows it.