|Radio and Electronics (DED Philippinen, 66 p.)|
|7. COMPONENTS OF MODERN RADIO RECEIVERS|
If you open a modern radio receiver, you will find, that all its components are extremely small. This is because the buyers of those radios want them to be as light as possible and the producers are trying to built them as cheap as possible.
To have light and small radios is on the one hand a big advantage. But on the other hand the tiny components, necessary for such small radios cause three major problems which you have to cope with if you want to repair this kind of radios instead of destroying them:
- small components have also a small mass. Small masses are heated up very easily. Most electronic components unfortunately are easily spoilt if they are heated up to much. Therefore while soldering in such radios you have always to take care,
- that the soldering iron is fitting for the job (as smaller the component, as smaller the iron).
- that the soldering tin is fitting for the job (thin tin takes less time to get molten)
- that you never heat up the soldering point longer than necessary to limit the heat energy flowing to it, or
- if it is not possible to avoid heat, to cool the soldered terminal down by holding it by a pair of plier or touching it thoroughly with a screwdriver.
- small components have mostly very thin terminmalwires too, so you should always be extremly careful when bending or pulling any component in such a radio.
- on an extremly small component you cannot write down any specifications. In order to enable you to find specification even though, there are used special colour codes. Generally you should not rub away any colour or letter on such a component. It might be you need this part of the specifications to repair the device properly.