Radio amateurs in Antwerp · ON4OSA
Welcome to OSA,
an Antwerp UBA section
OSA is an amateur radio club in Antwerp and a local section of the UBA.
Our section grew out of the CW operators of the legendary Antwerp coastal station OSA in 1935, making it one of the oldest in the country. Today we bring together more than 50 members.
Meetings
When we meet
Everyone is welcome — licensed amateurs, shortwave listeners and anyone curious.
Every first Thursday of the month
Urania Public Observatory
Jozef Mattheessensstraat 602540 Hove
Starting at 20:00
View on the map →
Every first Saturday of the month
On board the lightship West-Hinder 3
Droogdokkenweg 42030 Antwerpen
Drop in between 10:00 and 16:00
View on the map →
Program
Talks
Presentations on our club nights at Urania Public Observatory.
Upcoming talks
| Date | Time | Location | Speaker | Topic |
|---|---|---|---|---|
| Thu, Oct 1, 2026 | 20:00 | Urania Public Observatory, Hove | ON6DC | Wire antennas |
| Thu, Nov 12, 2026 | 20:00 | Urania Public Observatory, Hove | ON4ALY | HF propagation |
Past talks
| Date | Time | Location | Speaker | Topic |
|---|---|---|---|---|
| Thu, Sep 3, 2026 | 20:00 | Urania Public Observatory, Hove | ON5SEL | Expedition to the Isle of Wight, activated by members of our club and others |
| Thu, Jun 4, 2026 | 20:00 | Urania Public Observatory, Hove | ON4AWT | History and restoration of the lightship West-Hinder III |
| Thu, May 7, 2026 | 20:00 | Urania Public Observatory, Hove | ON5IA | Design your own PCBs with KiCad |
| Thu, Apr 2, 2026 | 20:00 | Urania Public Observatory, Hove | ON4CHE | From Si4732 mini radio to ARDF champion |
| Thu, Feb 5, 2026 | 20:00 | Urania Public Observatory, Hove | ON5UR | Expedition to the Andaman Islands |
| Thu, Jan 8, 2026 | 20:00 | Urania Public Observatory, Hove | ON4WIX | Wireless communication at cycling races and marathons (EMG Connectivity) |
West-Hinder 3
Station ON9BD
Club station ON9BD is located on board the lightship West-Hinder 3. OSA members activate it on various occasions and it is equipped with antennas for both the HF and VHF bands.
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