Author Archives

  • COVID-19 and 4U1A

    Inform you, that due to the coronavirus pandemic (COVID-19) and quarantine at the UN Center in Vienna (Austria), until April 13, 2020, the 4U1A club station goes to remote control mode.

  • United Nations ARC, 4U1UN

    PRESS RELEASE From United Nations ARC, 4U1UN New York, March.04.2020 YASME FOUNDATION IS RECOGNIZING THE KEY PEOPLE BEHIND RE-ACTIVATING 4U1UN The project took over four years to complete; James Sarte, K2QI and Adrian Ciuperca, KO8SCA are the key amateur operators who worked on the project and as such they will be the recipients of the […]

  • Pirate on the AIR

    We regularly observe the pirate activity by 4U1VIC callsign. The station is currently (temporarily) QRT. Activity takes place mainly in CW mode on 14 Mhz. This time we managed a short video of the pirate’s activity, who named himself Horst and gave QTH being near Vienna. We would like to bring this fact to the […]

  • Our guest –

    Eugene (R4AS) and Anna (RQ4A) from Russia visited the Club station on February 22. They are the owners of the famous Russian Also, the guys managed to check in on the HF (20m) by SSB with our special callsign 4UNR.         Thank you for visit us! We were glad to meet […]

  • Station Update

    4U1A Station Update.   3d “BURST-2000A” (2200 Watts) HF (160-6m) LDMOS with Water Cooling System Linear Amplifier delivered to the Club.   #ham #hamr #hamradio #amrad #amateuradio #amateurradio #CQDX #CQ #DX #QRZ #QST #VIC #UN #VICREC #radio #Vienna #Austria #4U1A #ARCDXC #radioclub #club #DXclub #Burst2000a #MOSFET #QRO


    4U0R (Same as 4UNR) 4U0R is valid for 2016 – 2019. 4UNR is active since 2020 (From 13 February till end of February) (13 February) World Radio Day. This special event call sign has been approved by UN HQ in New York USA. The World Radio Day seeks raise awareness about the importance of radio, facilitate access to information through radio and […]

  • We are in the Guinness Book of Records

    The largest number of amateur radio contacts in a year is 93,856, and was achieved by Andrey Fedorov (OE1ZZZ / KL1A / RW3AH) in Vienna, Austria, on 31 December 2018. Andrey made the contacts using the call sign 4U1A from the International United Nations Amateur Radio Contest DX Club (ARCDXC) at the Vienna International Center (VIC) in […]

  • 4U1XMAS 12-31 Dec 2019

    For doubters. Special event 4U1XMAS station is active until December 31, 2019. An official license is available. If you have any questions, please contact directly to ARCDXC (4U1A) by E-mail: 4u1a.arc(at)