Reading time: 2 minute This paper presents a series of examples of small automations easy to achieve, especially by young radio amateurs. Some assemblies are based on electrical applications. At each installation, however, there are several variants of use, especially electronic, which work with greater precision and safety in operation, presenting where appropriate both the variants with electronic tubes and semiconductors.
Reading time: 2 minute The operation of electrical equipment and installations is largely ensured by the efficiency in operation of the protection by relays. For this reason, when commissioning and then periodically, the protection installations are subjected to complex checks, after which it can be established whether they correspond to the purpose for which they were provided, as well as the remedial measures in case of defects.
Reading time: <1 minut In this small guide were included schemes of some particularly useful measuring devices, both in the activity of the circles and in the individual activity of the amateur radio. It also contains interesting applications, less known in the field of electronics.
Reading time: <1 minut The catalog presents a vast collection of relays typical of the 70s and 80s. Many of the manufacturing techniques of that time are still preserved today but on a smaller scale and using other types of materials.