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The inductance coil as a radio-electronic element is quite common. Sometimes not replaceable, for tuning many radio receivers and is used in many devices. It should be noted that exclusive things, sometimes do not get exclusive coils, so it is necessary to know not only the device coil inductance, and formulas for its calculation, but …
Read more Inductance coil by your own hands
It is quite natural that both a beginner and an experienced amateur radio operator face the problem of lack of a power supply. In the most primitive case, this problem can be solved by using a circuit with a quenching capacitor. In our article we consider the use of a reactive resistor to obtain the …
Read more A power supply unit with quench capacitor
This article presents an elementary circuit of a capacitance meter on a logic chip. Such a classic and elementary circuit solution can be reproduced quickly and easily enough. Therefore, this article will be useful for a beginner amateur radio operator who wants to build an elementary capacitor capacitance meter. Operation of a capacitance meter circuit: …
Read more Capacitor capacitance meter schematic