[Elecraft] Deflux?

Thu Aug 15 18:32:00 2002

John -

Very good point.  To obtain Anhydrous Isopropyl Alcohol (labeled as 99.9%)
in the US it is best to contact your local drug store pharmacist.  Alcohol
in this purity is usually not on the store shelf.  Keep away from exposed
heat sources or flames (and away from soldering irons)!

Greg
w9gb

----- Original Message -----
From: "John, KI6WX" <[email protected]>
To: "Elecraft Mailing List" <[email protected]>
Sent: Thursday, August 15, 2002 4:18 PM
Subject: Re: [Elecraft] Deflux?

> Many alcohol products are not pure alcohol and may contain additives.
These
> additives will leave a residue on the board and may cause circuit failures
> at some point in the future.  For instance, the isopropyl alcohol you buy
in
> the drugstore is generally only 70% pure.  If your alcohol container isn't
> labeled as to its purity, it probably contains additives and shouldn't be
> used to clean electronic circuit boards.
>
> The best alcohol to use to clean the flux off a circuit board is Anhydrous
> Isopropyl Alcohol which should be labeled as 99.9% pure.  This type of
> alcohol will not leave any residue from the alcohol and easily dissolves
> flux.  I would be very cautious about other cleaning products for the
> boards; you will probably be better off not cleaning them rather than
using
> the wrong cleaner, which is why Elecraft recommends not cleaning your
> circuit boards.
>
> -John
>  KI6WX
>
> ----- Original Message -----
> From: "Don Brown" <[email protected]>
>
> I usually clean my boards with denatured alcohol. This will clean the
board
> but will sometimes deposit a white residue. I have found by adding a
squirt
> of WD-40 to the alcohol prevents this and makes it clean better.  I use a
1
> inch paint brush with the bristles cut to about 3/4 inch long to scrub the
> board. Then blow the board off with an air gun or hair dryer. I have been
> using this technique for many years and it works very well.
>
>
>
>
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