[TenTec] Slightly off subject

[Howie WA3MCK]

Methyl Ethyl Ketone - MEK - beats alcohol hands down... still legal in
Pennsylvania - use it carefully and sparingly. Ventilate your shop/work
area...
Howie WA3MCK

On Fri, Oct 20, 2017 at 16:31 Stuart Rohre <Rohre at arlut.utexas.edu> wrote:

> 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.
>
> Good Luck!
> Stuart Rohre
> K5KVH
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