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.

When do we meet?About OSA

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 60
2540 Hove

Starting at 20:00

View on the map →

Every first Saturday of the month

On board the lightship West-Hinder 3

Droogdokkenweg 4
2030 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, Nov 12, 2026	20:00	Urania Public Observatory, Hove	ON4ALY	HF propagation

Past talks

Date	Time	Location	Speaker	Topic
Thu, Oct 1, 2026	20:00	Urania Public Observatory, Hove	ON6DC	Wire antennas
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.

On the air