China’s new antenna is five times the size of New York City

China has built a giant experimental radio antenna on a piece of land almost five times the size of New York City, according to researchers involved in the highly controversial project.

The Wireless Electromagnetic Method (WEM) project took 13 years to build but researchers said that it was finally ready to emit extremely low frequency radio waves, also known as ELF waves. Those waves have been linked to cancer by the World Health Organisation-affiliated International Agency for Research on Cancer.

Although the project has civilian applications – officially it will be used for earthquake and mineral detection and forms part of China’s 11th five-year plan – it could also play a crucial role in military communications.

Scientists said that its transmissions could be picked up by a submarine lurking hundreds of metres under the sea, thus reducing the vessel’s risk of having to resurface to receive transmissions.

The project follows the construction of China’s first military-grade Super Low Frequency transmission station in 2009.

The next year, a Chinese nuclear submarine successfully communicated with the station from deep water – making China the third country in the world to have established such a submarine communication system, after the United States and Russia.

But the Chinese navy is eager to expand its capacity and has been pouring resources into the more advanced ELF radio technology, which allows submarines to communicate with the command centre from a greater depth and is harder to disrupt.

The Chinese government, however, has played down the importance of the facility, which occupies some 3,700 sq km (1,400 square miles) of land, in information released to the public.

Apart from the need to protect an important strategic asset, some researchers said that the secrecy was to avoid causing public alarm

Media Story - https://www.scmp.com/news/china/science/article/2180071/chinas-new-antenna-five-times-size-new-york-city-it-also-cancer

Galway VHF Group Digital Projects to go Live

Following rigorous bench testing, the Galway VHF Group Digital Projects will be going live from their new site on the Western side of Galway City this weekend (3/4 November 2018).

The 70cm DMR repeater, EI7RHD, operates on 439.450 MHz O/P and 430.450 MHz I/P with a power output of 30 watts into a 9db Gain Colinear antenna.

The Multimode Digital Gateway, EI2GCD, will initially run DMR and Yaesu Fusion on 144.850 MHz running 20 watts into a dipole antenna. There are facilities to add more digital modes such as D-Star and P25 should the need arise.

The Galway Wires-X gateway, EI2SHD, operates on 144.8125 MHz and is operational from the Salthill area running 20 watts. This will facilitate experimentation with Wires-X networking in conjunction with the Galway Fusion Repeater EI2TBR.

Galway VHF Group - http://galwayvhfgroup.blogspot.com/

Catalonia 70cm RB-TV Beacon

On 23rd October 2018 a 70cm RB-TV beacon was installed in Catalonia.

The beacon is based on a remote controlled raspberry pi with F5OEO software, located at the top of Montjuïc mountain in Barcelona (JN11BI).

Transmission frequency 434,5MHz, power 1w, 2 element Yagui, F5OEO software. Project was conducted by EA3CNO (Antoni) and EA3ANS (Joaquim). There has been reception reports from Terrassa, 25Km north of Barcelona.

More Information - http://www.radioaficionats.cat/radioaficionats/baliu-rb-tv-a-catalunya/