4U1A United Nations Amateur Radio Contest DX Club


The amateur radio club station of the Vienna International Centre Amateur Radio Contest DX Club (ARCDXC) 4U1A was officially opened on September 07, 2015 by the Vienna International Centre Recreation Committee (VICREC).

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During the celebration of the WORLD DAY RADIO (WRD) 2019, the UN Club Station (ARCDXC) 4U1A in Vienna (Austria) will operate as a special event radio station – 4U0R from February 13 to February 28, 2019 on all HF Amateur Radio Bands.
QSL via UA3DX.

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(also called “ham” radio) is the use of designated radio frequency spectra for purposes of private recreation, non-­‐commercial exchange of messages, wireless experimentation, self-­‐training, and emergency communication. The term “amateur” is used to specify “a duly authorized person interested in radio electric practice with a purely personal aim and without pecuniary interest;” (either direct monetary or other similar reward) and to differentiate it from commercial broadcasting, public safety (such as police and fire), or professional two-­‐way radio services (such as maritime, aviation, taxis, etc.).

The amateur radio service (amateur service and amateur satellite service) is established by the International Telecommunication Union (ITU) through the International Telecommunication Regulations. National governments regulate technical and operational characteristics of transmissions and issue individual stations licenses with an identifying call sign. Prospective amateur operators are tested for their understanding of key concepts in electronics and the host government’s radio regulations. Radio amateurs use a variety of voice, text, image, and data communications modes and have access to frequency allocations throughout the RF spectrum to enable communication across a city, region, country, continent, the world, or even into space.

Amateur radio is officially represented and coordinated by the International Amateur Radio Union (IARU), which is organized in three regions and has as its members the national amateur radio societies which exist in most countries. According to an estimate made in 2011 by the American Radio Relay League (ARRL), two million people throughout the world are regularly involved with amateur radio. About 830,000 amateur radio stations are located in IARU Region 2 (the Americas) followed by IARU Region 3 (South and East Asia and the Pacific Ocean) with about 750,000 stations. A significantly smaller number, about 400,000, are located in IARU Region 1 (Europe, Middle East, CIS and Africa).


  • UN Sector

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