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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Flux dosing method. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Ham Radio Technologies

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When soldering, radio amateurs often use alcohol-rosin flux - a solution of rosin in alcohol. It allows you to get high quality soldering and its good appearance. True, when applying the flux with a brush, it quickly dries on it, and at the end of the work the brush has to be washed in alcohol.

It is much more convenient to apply the flux with a disposable syringe with a volume of 2 or 5 "cubes". It is necessary to dial 0,5 ... 1 "cube" of flux into it, and fill the rest of the volume with air. Lightly squeezing the syringe, squeeze a drop of flux onto the soldering site. For ease of use, the syringe needle should be blunt.

To prevent the flux from drying out in the needle channel, after soldering, you need to draw some air into the syringe, holding it with the needle up. In the same position, And store a syringe with flux.

If the flux is still dry, just touch the tip of the heated soldering iron with the tip of the needle - the needle will immediately be cleaned.

And one more piece of advice. After soldering, wash the printed circuit board with alcohol and cover it with an alcohol-rosin flux - it will get a good appearance, and its conductors will be protected from oxidation.

Author: P.Aleshin, Moscow

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