Various public services portals accept files in electronic form of a strictly limited size. The usual requirement is a file size less than 5 MB. But many PDF files have a larger size due to the fact that the PDF format has recently been used for storing scanned documents. This message shows two ways to reduce the size of PDF files.

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For a colleague, I made a home computer from the organization’s decommissioned equipment (motherboard on an 865 chipset, socket 775) and upgraded the PC for little money. Due to poor performance, it was necessary to optimize the viewer settings for video playback.

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On November 2020, the version 2.3.0RC2 of the well-known program for digital communication types WSJT-X (author Joe Taylor, K1jt) was published. This version - "Release Candidate" - precedes the release of the final version. Already now we can talk about the innovations of version 2.3. What changes will be brought to version 2.3?

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The proposed antenna is useful for transportation in the trunk of a car in a collected form - dimensions: 1000 x 980 mm.

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The article is devoted to setting up a web server, PDT in Eclipse, Composer and TWIG. Updated '2024!

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Приthere was a positive result for the SARS-Cov-2 test. I describe the symptoms day by day...

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The FT8 digital mode has gained incredible popularity and recognition around the world. Radio amateurs want to use it not only for long-distance DX QSOs on short waves, but also in competitions, including on ultra-short waves 144 and 432 MHz. The WSJT-X program provides an operating mode for European competitions using FT8 modulation.

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Most 6 -element antennas per range of 144 MHz suffer in one drawback - the length of their traverse is more than 2 meters.
But the square profile and pipes in the store have a length of 2 meters smoothly.
I calculated the compact (1.96m length) antenna for the range of 144-146 MHz, 1 meter 94 centimeters long, without the need to drink or increase the traverse.

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In recent days, when searching in Yandex, a floating window "- is this your account?
Not now
Enter ".
The window closes almost a third of the smartphone screen. Nowhere on the Internet I found a solution for how to remove it. Perhaps the problem is only for me. 😦 I give a solution to the problem.

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