[TenTec] Slightly off subject
Rohre at arlut.utexas.edu
Fri Oct 20 16:29:57 EDT 2017
Ethyl Alcohol will clean up circuit boards safely. You need to get one
of the brushes called "Acid brushes" which have a metal handle holding
bristles. Cut the bristles to only 1/4 inch from the ferrule, straight
across, to make the brush stiffer. Dip brush into alcohol and transfer
to board and gradually scrape off the green crud.
This may be a sign of someone using acid core solder, or storing circuit
board in a damp environment. On solder side of board, you may try
pre-brushing with a brass bristle brush, to loosen the green crud.
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