2thm8kr
Beanosavedmysociallife
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I used to be in awe watching an old Cuban master tech solder like this that worked for me. Its a fine line between a perfect joint and a rolled margins. the laser welder made my life so much more predictable with out any bone dances.
This old school way in the hands of a skilled tech is awesome unfortunately the strength of the joint isn't anywhere near the strength of the parent alloy. This is another reason why a laser is far superior in every way.
If you bury the margins in the investment you get zero roll. The trick to this technique is setting up the investment for the solder job.
The only solder joint I have had break in 20+years (knock wood) was a Downs syndrome patient that was a hard-core clencher.