Sender Anninger, Transmission facility at Vierjochkogel, Gaaden, Austria

Sender Anninger is a radio transmission facility located at 650 meters above sea level on Vierjochkogel at the eastern edge of the Wienerwald forest. The complex houses multiple broadcasting antennas and emergency communication equipment serving the Vienna basin and surrounding areas.

Two small Luftwaffe radio transmitters stood on the Vierjochkogel during World War II. The present facility dates from 1956, when a directional radio station of what is now A1 Telekom Austria was built at 650 m above sea level. Until the Exelberg station was built in 1978, it also carried the western route of the Telekom network to the Jauerling transmitter.

The facility represents a central node in Austrian telecommunications infrastructure, connecting the southern route of A1 Telekom Austria's network across the region.

The facility is fenced and not open to the public for safety reasons. The mountainous woodland setting provides viewing opportunities from nearby hiking trails that pass through the surrounding forest.

The stone wall remnants outside the fenced compound are thought to come from a former water container, not a tower. They sit beside a site that already carried two small Luftwaffe transmitters during World War II.