Sweat gets a bad rap. We blame it for stink. We accuse it of staining clothes and ruining white tees, and we react in disgust when it appears.

Understanding the Context

But this ill will toward perspiration is misguided. Truth ... Sweat is a community-driven platform offering fitness programs, discussions, and support to help individuals achieve their health and wellness goals. Normally where people get burned is that their boards get put in a "condensing" environment even though everything is specified as "non-condensing".

Key Insights

But that's not a design problem so much as a specifications issue. tl;dr Don't sweat it and just do your design. Good luck. Sweat Soldering is the optimum way to bond the board and the metal clad. Just solder paste is required.

Final Thoughts

Going with adhesive will increase the cost of fabrication and also the cure temperature requirement for the adhesive will make the fabrication more complex. Thank you all. So, the clock offset won't meaningfully affect your receiver. So, I wouldn't sweat it; if you can get a 26.041 MHz oscillator, that's going to be more than good enough. However, there's also an easy way out here that only needs a much easier to get multiple: generate 40.0 kHz, 60.0 kHz, and a (77.5 - 40.0) kHz = 37.5 kHz The only people who sweat ground loops are audio types who should be using balanced connections or hierarchical grounds and near DC instrumentation types who again should be separating ground and reference... Note that this applies within a device, external interfaces have other issues.

Hand sweat consists mostly of water and trace amounts of urea, minerals and lactic acid. I would say that lactic acid is a moderate acid with a pka of approx. 3.5, but we are talking trace amounts in sweat. But if these are just test points (which I agree I think they are) and you don't know where they lead to, then you couldn't get any use out of them anyway...