In amateur radio practice, multifunctional generators of the FY2200S series or similar are widely used, as well as various amateur radio designs, например, described by the author in RA No. 5-6 for 2019 g. But in many cases, you can get by with a generator of rectangular pulses, if it provides wide enough… Continue Reading
The basis of this device is the integrated circuit A6966 manufactured by UTC (Unisonic), supplied in a convenient SIP9 housing. The electrical diagram of the audio signal level indicator is shown in Fig. 1, this is a typical application of this microcircuit, recommended by the manufacturer in the reference to the catalog. An amplifier is installed at the input of the U1 microcircuit… Continue Reading
Amateur radio multimeters, as well as component testers, e.g. type UTK-12, usually rated for supply voltage 7…9 V and powered by a battery of the "Krona" type, whose service life is relatively short. You can note, that cheap "Crown" can have an increased self-discharge current, because of what their… Continue Reading
This article describes a simple device, with which you can use simple multimeters, safe for them, measure a voltage of several kilovolts. In amateur radio practice, it is often necessary to measure a voltage of several kilovolts. (например, when working with devices containing cathode ray tubes,… Continue Reading
In electronic equipment, defects in oxide capacitors are often the cause of failure.. And if the break, breakdown or loss of capacity is easy to determine, the increased internal resistance (ESR) it is impossible to determine without a special device. One of the variants of such a device is offered.… Continue Reading