1
April
2021
Checking DVD and CD reading
16:39

Checking DVD and CD reading

1 April 2021 16:39

Often, after writing data to a new DVD-R disc, you want to make sure that the files are readable. Also, old, scratched CD-R discs may raise doubts about their readability in a DVD-RW drive. Before using such disks, it is advisable to perform a read test, which will not take much time.

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26
March
2021
Radio beacon RB1CA in Priozersk
13:49

Radio beacon RB1CA in Priozersk

26 March 2021 13:49

For a long time, there were no VHF beacons in the 144 and 432 MHz ranges on the air in St. Petersburg and the Leningrad region.
This made it difficult to determine the tropospheric passage. But in 2021 the situation has changed.

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3
March
2021
14:33

PI4 - digital mode for VHF beacons

3 March 2021 14:33

Since 2018, the standard for transmitting signals from amateur radio VHF beacons using 4 tones has taken root in the world - the so-called PI4.

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1
March
2021
17:20

Main amateur radio frequency bands

1 March 2021 17:20

Frequencies in Russia are assigned by SCRF - State Commission on Radio Frequencies.
The first document is a general table of frequency allocations and the second is a current decision for the amateur radio service, which specifies the table for specific frequency bands and modes of radiation.

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9
February
2021
14:21

Carefully clean up traces of files on disk using the SFill and DD commands

,
9 February 2021 14:21

ОднOnce I had to give an employee a USB flash drive on which both programs and personal photos were stored. I deleted the photos, but they remained in the sectors and their employee could restore them if he wanted. Therefore, we need a way to clean up free disk space. I found a command on how to do this - it works with NTFS, FAT and EXT3 file systems. The command line program is called SFill.

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20
January
2021
Rescuing information from your hard drive using HDDSuperClone
16:53

Rescuing information from your hard drive using HDDSuperClone

20 January 2021 16:53

The user brought a disk with files covered with bad sectors. An attempt to copy information was interrupted with a read error. Victoria's remap operation resulted in numerous reports of the UNCR sector being unable to recover. As a result, I came to the HDDSuperClone program for Linux, in which I copy information from disk or disk that can be saved.

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