Hello, I have been dismantling things for the last several days and have accumulated many circuit boards. I was wondering how to determine if the board is low or high grade?

I have been told look at the resistors - the smaller the better. Also, to look for gold-colored pathways.

I was recently told about the "see-through test" and was wondering how reliable it is. That is, holding the board up to a light source. If you can see through it, its low grade. If you do not see the light / BARELY any light, it is high grade. This all relying on the thickness of the board as a indicator.

Your thoughts? I plan to take everything back today and am hoping to maximize on them instead of throwing them all off as breakage.



Thanks for your time guys!