Welcome to the OSA / ON4OSA website

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OSA is the oldest club in Antwerpen and is a member of UBA ( Royal Belgian Amateur Radiounion ) The club started in 1935 with CW operators from the Antwerp coast station OSA . Main goal was to navigate ships through the river Schelde coming from the north sea and to support the coast station in Oostende .

Our clubmeetings are held every 1 st Thursday of the month in café “ De Nieuwe Kroon “,St-Bavostraat 69 , 2610 Wilrijk .

Due to Covid 19 we have meetings via repeater Boom on 145.787,5 with ctcss 131,8 and subtone -0,600 , every Tuesday from 20:00 local time .

Our club is owner of the following callsigns :


          • ON4OSA : mostly used for fieldday and clubactivations
          • ON9BD : used from Lightship Westhinder 3
          • OS4OSA : special call from 18 april 2021 till 12 december 2021 .


Our club frequencies are 145.425 and 145.560 mhz . 

For more information send mail to Dit e-mailadres wordt beveiligd tegen spambots. JavaScript dient ingeschakeld te zijn om het te bekijken.


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