What is APRS?

APRS is a system for transmitting GPS messages and geographic coordinates based on PACKET (AX.25 protocol) and AFSK 1200 modulation. APRS is designed to operate in a small area of ​​one region, in the area of ​​operation of one digital repeater (digi) or a group of repeaters connected to a network.

More info

Upgraded an old 10 year old PC from Ubuntu 14.04 LTS to 16.04 LTS.
Almost broke the system during the upgrade release.
But everything worked out.

More info

Using a amateur radio station without a computer is almost unthinkable - even SSB and CW contacts require registration in a radio log. Linux is actively developing radio control using a computer. This review article is about interfaces and programs for working as a transceiver (transceiver) in Linux.

More info

When combining the operation of digital types of radio communications, you need:

• First, to coordinate the signal levels between the two devices,
• Secondly - maintain the signal level within certain limits (regulation of the output level).

This article is devoted to a home -made attenuer to weaken the sound signal for digital species.

More info

I would like to collect on this page all the information about using the repeater on board the ISS (International Space Station) and other operating satellites (PSAT) to transmit APRS packets.

More info

This article is about setting up the Xastir program for amateur radio packet transmission of GPS coordinates called APRS on the terrestrial frequency 144.800 MHz.

More info

All hams know about the popular, fast, long-range and cost-effective FT-8 digital mode developed by Joe Taylor K1JT. I work on air in FT8 using the WSJT program under Linux Debian 10 (buster). Installing and configuring WSJTX under Debian Linux is simple and takes a few minutes.

More info

The ERMAK format is intended for sending reports on participation in all-Russian sports competitions on short waves. ERMAK is the only acceptable format for providing reports on HF competitions, for which it is possible to receive sports categories.

More info

When opening files from a local drive, style sheets from the remote server are not applied. As a result, instead of a beautiful table, an error is displayed in the browser. For example, this situation occurs with XML extracts from Rosreestr.

More info

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.

More info