Radio frequencies for shortwave

Do you enjoy listening to shortwave and have noticed the frequencies used by your favourite broadcaster change twice a year? Interestingly there is a scientific reason behind this.

Shortwave travels long distances because of its unique way of propagating. The transmission is beamed upwards towards the sky where it is reflected back down to earth spanning a huge distance between the two points. In good conditions a single transmitter is able to reach millions of listeners around the world.

This is what makes shortwave unique and incredibly effective, especially to remote audiences as well as to areas where news and information is highly controlled. 

As a general rule, higher frequencies (SW) work best during daylight hours and summer time while lower frequencies (MW) work better in darkness – before dawn and during the long winter evenings. 

 This same frequency can not be used all year round because as the seasons change the number of daylight hours at any location can directly affect the optimum frequency band. This is because the energy from the Sun required to ionise reflective layers in the upper atmosphere is directly impacted by the sunlight hours available. So seasonal changes causing shorter sunlight hours will affect daily propagation of a higher frequency, and so a lower frequency will need to be chosen to provide similar coverage during the period of shorter days.

The High Frequency Coordination Committee (HFCC, under the ITU International Telecommunications Union) is the body that has the responsibility to decide when to change shortwave  frequencies.They must coordinate these changes with all the major shortwave broadcasters around the World.

To ensure the optimal transmission conditions the HFCC recommend  two seasonal frequency schedules – summer and winter – known as the ‘A’ and ‘B’ seasons.

The changeover between seasons is internationally agreed to occur on the last Sunday in March (start of ‘A’ season) and the last Sunday in October (start of ‘B’ season), which coincides with start and end of ‘Daylight Saving’ in many countries, where local time can change.

The changeover ‘A20’ season has just occurred on Sunday 29th March, and the frequencies agreed for all shortwave transmissions will continue until the beginning of the next season ‘B20’, on Sunday 25th October.

Have you seen the latest edition of Silicon Chip magazine? Our latest product the Xiegu G90 has its own 2 page spread with a favourable review by ROSS TESTER.

 The most notable features are: transmit power of up to 20 watts adjustable in 1 watt increments so output power can be adjusted to suit band conditions, built in ATU, detachable control head for vehicle operations, and a superb general coverage receiver.

Operating frequencies can be directly-entered via the microphone keypad or “dialled up” using the 1.8 inch front panel with 25 push buttons for control.

ROSS TESTER noted that online reviews of the G90 world wide, rate the transceiver at least 4 stars, with many rating the radio 5 out of 5. The unit has been reviewed recently in QST magazine in the USA and Radcom, the monthly magazine of the Radio Society of Great Britain.

Here at Tecsun Radios Australia we heavily research and test new products and much consideration is put into what products we release to the market.

The Outstanding Features of the Xiegu G90 for us are the following.

** 20 watts output power

** Inbuilt ATU

** Detachable front panel

** Superb general coverage receiver

** Waterfall and spectrum display

In addition to these fantastic features the Xiegu G90 represents fantastic value retailing for around half the price of most transceivers on the market.

The Xiegu G90 transceiver is available for order in our webstore with same day shipping available for orders placed before 12pm Business days.

Are you looking to add the Xiegu G90 Transceiver to your collection? Get yours here.

See a preview of the article by clicking here.

Radio licence applications soars.

shrotwave radioin Africa

In a world where internet connectivity and social media reign supreme it is interesting to reflect on the power radio still has in developing countries.

A great example of this is the country of Mali in West Africa that often experiences political unrest and unreliable power sources, the need for information is critical.

In Mali, internet coverage is scarce providing only 30% coverage to the region. In rural areas, where even less people have internet access, and the power supply can be unreliable, most people rely on battery-operated radio sets for information.

Furthermore,  for those with internet coverage, mobile data is quite expensive meaning streaming digital radio or listening through a social platform or app can be very costly.

Shortwave radio can be accessed by workers in the fields in isolated areas, even whilst driving which has made radio a critical source of information and dialogue.

Mali’s largest private radio station, Radio Kledu, not only provides regular news and informative programming, they have also included an editorial policy to give everyone a platform to express their opinion. In Africa this is not always an easy task, where terrorist groups often target journalists.

A recent broadcast featured a special program about teachers’ long-running strike for higher pay. 

The lunchtime show presenter Oumou Dembele encouraged debate by first interviewing the teacher union representatives to hear their side of things. Later in the show the government were invited to present their version on air. 

For many in Mali, the work of radio journalists like Dembele is vital to keeping them informed. 

“Radio reaches far more people than any other media on the continent,” says Franz Krüger, Director of the Wits Radio Academy in South Africa.

Even in developed and media-savvy countries like South Africa, more than 90 percent of people listen to the radio.

Franz Krüger mentioned “Radio can be produced cheaply and reaches the disadvantaged faster,”.

The same can be seen across the islands of the south pacific reporting similar figures with only a small amount of the population having access to Tv signals and internet.

Many of the rural and disadvantaged villagers rely solely on radio to stay up to date on current political movement, news and regular weather warnings.

Broadcasters like Radio Vanuatu and RNZ Pacific keep an otherwise isolated region connected.

Listen to shortwave radio?

Here are a few of our most popular shortwave radios.

tecsun s200TECSUN S2000

4th generation desktop receiver with provision for external antennas,

allows you to listen to AM, FM, shortwave, longwave and VHF Air Band broadcasts

Tecsun PL600 World Band Radio

The Tecsun PL600 World Band Radio provides reception of the shortwave, medium wave, long wave, and FM broadcast bands.

Shop the full Tecsun radios Australia ranger HERE

One of the oldest and trusted services.

In the modern age where internet technology, social media and informational apps reign supreme the Vanuatu Broadcasting Television Corporation (VBTC) is investing AUD$12 million in upgrading its national radio service through its shortwave and medium wave (AM) service.

VBTC chief executive officer, Francis Herman says In Vanuatu many of the villagers do not receive television transmissions and currently only 30% receive radio transmissions. 

Radio Vanuatu is the only viable means of reaching Vanuatu’s rural population.

With the new upgrade that coverage will increase to 100% right across the 80-plus Islands of Vanuatu, connecting the country.

As listed by the United Nations, Vanuatu is one of the most disaster-prone countries in the world and regularly experiences earthquakes, cyclones and floods.

Information is crucial during these events.

Shortwave radio is an essential complement to Vanuatu’s national radio service due to its far reaching capabilities even when the power, internet or local networks are down.

Technology commentator Peter Marks said “Shortwave comes from over the horizon it will continue to work even when local conditions are difficult like extreme weather that might knock out local FM and AM stations and internet,” 

 

A cost effective way to reach the population of Vanuatu to deliver important messages.

VBTC chief executive officer, Francis Herman says “Radio as you know is cost effective, people can pick it up on their phone, in the villages where television can not reach, radio is the companion for people,” .

“We have general elections in March next year, we are about to head into the cyclone season beginning in November and so its important, it’s crucial that the people of Vanuatu can get access to a reliable and credible broadcaster,” Mr Herman said.

This is why investing in a national shortwave service is even more important than ever even in the modern age.

 

Radio Vanuatu can be found at. 

RADIO FREQUENCY 
MEDIUM WAVE1125KHZ
SHORTWAVE3945KHZ (NIGHT TIME)
7260 KHZ (DAY TIME)
FM100 MHZ (VILA & SANTO)
98 MHZ (TANNA & SANTO)

Radio Vanuatu features a morning show with Dorinda Mabon from 5:30am till 9am

Marie-Noelle Kaltak hosts the mid morning show and evenings are hosted by Florence Vanua.

Do you currently listen to Vanuatu radio? We would love to see your listeners report.

Comment on the post below or email to hello@tecsunradios.com.au

Images via Radio Vanuatu website.

Radio New Zealand have a new shortwave frequency for the Region.

RNZ Pacific (RNZI) provides comprehensive Pacific  news coverage with the very latest Pacific stories as well as a live audio feed, podcasts, and on-demand programmes.

RNZI broadcasts in digital and analogue short wave to radio stations and individual listeners across the Pacific region. The RNZ Pacific signal can sometimes be heard as far away as Japan, North America, the Middle East and Europe.

RNZI was named the International Radio Station of the Year 2007  by the Association for International Broadcasting (AIB). RNZ Pacific also won the Most Innovative Partnership category recognising the way it works with local Pacific media.

RNZ Pacific (RNZI) broadcasts at the following frequencies and times to different parts of the Pacific Region.

UTCKHZTARGETDAYS
00:00 - 05:5815720PacificDaily
05:59 - 07:5811725PacificDaily
07:59 - 09:589765PacificDaily
09:59 - 12:586115 from 15 JanSolomon Isl , PNGDaily
12:59 - 19:586115PacificSat
12:59 - 16:506115PacificSun - Fri
16:51 - 17:505975 DRMTonga Niue Samoa Cook IslandsSun - Fri
17:51 - 18:5011690 DRMTonga Niue Samoa Cook IslandsSun - Fri
18:51 - 19:5813840 DRMPacificDaily
19:59 - 20:5811725PacificSun-Fri
20:59 - 22:5813840PacificDaily
22:59 - 23:5815720Pacific Daily

MAINTENANCE DAY: Every month on the first Wednesday RNZ conducts Maintenance at their transmitter site from 2230 – 0600 UTC. ( Thursdays 1030 – 1800 NZST) During this period there may be interruptions to programming.

 

Over the past eight weeks we have been running a competition to win a Tecsun PL880 radio. The purpose of the competition was to generate excitement around the capabilities of shortwave and promote Radiogram to budding amateur radio enthusiasts.

Read more

Want to see your decoded radiograms featured on our website?
Remember to tag @TecsunRadios and #DecodeToWin!

Read more

The ocean racing yachts that will set off on Wednesday’s Sydney Hobart Yacht Race are required to carry radio equipment that includes both VHF and HF radios.

Perpetual LOYAL competes in the 2014 Sydney Hobart Yacht Race
Image courtesy of Michael Cratt
Read more

This week Federal Labor has announced that if elected to Government next year it will provide $2 million in funding for the ABC, specifically to bring back shortwave radio services across some of Australia’s most remote areas.
Read more