When making amateur radio designs, circuit boards and other amateur radio stuff, as a rule, many people use various kinds of chemicals. Starting from simple pine rosin, solder grease, flux, solder paste and ending with special acids. Despite the variety of cans in which all this chemistry is sold, there are some difficulties with the application of liquids on the soldering points. Liquid flux and alcohol and rosin as a rule spread on the board. Paste, as a rule, it is difficult to dose and carefully smear on the soldering points, so as not to overdo it.
For flux in the form of paste, I personally use ordinary toothpicks, and I wish you the same. The process of applying flux becomes very simple, and the soldering place remains neat, which is important where jewelry precision is required. For tinning thick wires, you can stock up on cotton swabs (which you use to pick your ears).
And here is the process of applying liquid fluxes I want to bring out separately.
Application of liquid fluxes:
I’m sure many of you have faced the problem of pouring liquids over a wide neck. Then the whole board is smeared, looks unsightly, sticky, and you need to make sure that it does not short-circuit anywhere. In order to exclude a lot of bad factors, as well as for economical use of the chemical, I propose to use the following idea (Figure 1).
Buy a small enema bag and a disposable syringe from the nearest pharmacy – although you only buy it because of the needle – so if you already have one, you don’t need a syringe. You’ll also need “super glue” – the kind that you can stick plastic to anything.
Surely looking at figure 1 it is not difficult to guess how it is made. The enema can be shortened to the length you need. Do not throw away the cap from the needle – it does not let the liquid spill, in case you accidentally hit and knocked over the enema. But the point of the needle is desirable to cut or cut off, so that then it does not hurt. The main thing do not dare to bite off the tip of the cutters, you will only bend it, as the tube is very thin. It is better to take a fine-grained sandpaper and carefully cut off the tip.
Examples of judicious use of capacity:
Of course, it is not necessary to use an enema as a container. Your alcohol or liquid flux must have been bought in a small jar with a narrow neck, so it can also be used as a dispenser (figure 2).
This will embellish the task for you. Glue the needle directly to the neck. The needle can be bent a little for easy flux application. Using such a container is very convenient – I know from myself. The flux is consumed economically and is neatly applied to the soldering point.
