Engineer Sergii Zadorozhnyi website
Simple SolutionsBlog Archives
Refinement of the DEGEN DE1103 Radio Receiver: Applying the Signal from the Antenna Directly to the Input of the First Mixer
Wednesday , 4, July 2012 Radio, Solutions Leave a commentThe modification of the DEGEN DE1103 radio receiver described below was done to provide the radio receiving in long and medium wave bands with an external antenna (or with the standard telescopic antenna), but not with the built-in ferrite rod antenna. Now while working on short waves too, the received signal from the standard telescopic […]
March 1, 1941 can be considered the day of the appearance of FM radio broadcasting in its usual form, that is, as a commercial industry, when the W47NV radio station with a transmitting center in Nashville, Tennessee, USA, went on the air for the first time. Here is how the American weekly “Broadcasting” wrote about […]
An experiment with an audio recording of the reception of a broadcasting radio station in the medium wave band was carried out in order to once again confirm the ability of the anti-noise ferrite rod antenna “Olusha-10” to suppress industrial and domestic radio interference. The principle of operation of the “Olusha-10” antenna is described in […]
Matched Load: Theoretical Foundations of Practical Benefits
Sunday , 4, July 2010 Radio Leave a commentIn the educational literature, load matching is most often considered in relation to the wave properties of a long line during the transmission of a high-frequency signal. But here the energy relations are considered during the transfer of energy from an active two-terminal network to a passive one.
Anti-noise Ferrite Rod Antenna for the Medium Wave Band “Olusha-10-MW”
Wednesday , 2, June 2010 Radio 4 CommentsAfter the publication of the author’s articles “Suppression of Common-mode Interference to Radio Reception” and “Master-kit from “SELGA-404” Radio Receiver Parts: Anti-noise Ferrite Rod Antenna “Olusha-T”, the anti-noise ferrite rod antenna “Olusha-10” was developed, which, unlike the antenna “Olusha-T ”, is already an independent product, and not a rework from the parts of an old […]
Master-kit from “SELGA-404” Radio Receiver Parts: Anti-noise Ferrite Rod Antenna “Olusha-T”
Friday , 1, August 2008 Radio Leave a commentThe home life of a resident of a modern industrial city is oversaturated with household appliances: audio, video, kitchen, computer, etc. Much of what the city dweller now cannot (or does not want to) do without is a rather powerful source of radio interference, due to which the reception of even powerful broadcasting stations is […]
Suppression of Common-mode Interference to Radio Reception
Saturday , 1, March 2008 Radio Leave a commentIn the conditions of an unfavorable electromagnetic environment of a modern industrial city, the reception of amplitude-modulated signals from radio stations operating in the ranges of long, medium and short waves is very difficult. Sources of electromagnetic interference are powerful electrical equipment of industrial enterprises, electric vehicles, lighting devices, computers, household appliances, etc. The use […]