Two flash drives from the same manufacturer, purchased in different stores, behave differently.

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The essence of the experiment: find out which antenna will create the maximum field strength at a distance of 5 km.

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On Sunday, I decided to install and test an antenna of the End Fed antenna for two ranges: 7 and 14 MHz. This is what came of it ...

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Most netbooks and many laptops have a small amount of RAM or a weak processor. Therefore, they often put Linux to make them work faster. The article is devoted to the testing of the OS.

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СраI listen to the sensitivity of the FM receiver Retekess V115 with car radio Daewoo AGC-1220RF-A, part code 2811 55052R, supplier code 269 779. Also, a way to improve VHF reception from Retekess is given.

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The receiver Retekess V115 (also known as Tivdio V115 and Kaimeda SRW-710S Mini and Audiomax SRW-710S and VR robot WC-710S and HanRongDa K-603) version F9205A came into my hands when I ordered it on AliExpress to replace the lost Tecsun PL-310ET. We needed a compact and inexpensive all-wave CB-HF-VHF-FM receiver with direct frequency input and good sound.

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Saturday May 14, 2022 was warm, sunny and dry with no wind. To test the receiver in conditions close to ideal, I went in the evening to the Pulkovo Heights (75 meters above sea level).

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In a radio component store, I bought a room antenna for 200 rubles ($ 3) in order to check what it is capable of taking radio waves of the VHF range.

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