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Michael

Discover the New Schedule for RNZI: Your Gateway to the Pacific

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Hey there fellow shortwave enthusiasts!

I’m Garry from Tecson, and I’m thrilled to share with you the latest schedule for Radio New Zealand International (RNZI). Thanks to a fellow enthusiast who passed this along, we’re excited to dive into what RNZI has to offer our community.

RNZI has long been a cornerstone for those of us passionate about shortwave radio, providing in-depth news coverage, current affairs insights, and captivating audio features. Now, with their updated schedule effective March 31st, there’s even more to look forward to.

New Schedule Highlights:

Maintenance Day: Keep in mind, folks, that RNZI observes Maintenance Day on the first Wednesday of every month. From 2230 to 0600 UTC (Thursdays 1030 to 1800 NZST), there might be some interruptions to our regular programming. But hey, it’s all in the name of keeping those airwaves clear and crisp!

Satellite Availability: For those who prefer satellite access, RNZI has got you covered, thanks to TVNZ Pacific Service. Now you can tune in with ease, no matter where you are.

Frequency Details for RNZI:

– Satellite Slot: IS19/23 C Slot A

– Downlink Frequency:** 4146.5 V

– FEC:** 3/4

– Symbol Rate:** 5.6320

So there you have it, folks! With RNZI’s new schedule and these handy frequency details, we’re all set for some top-notch shortwave listening. Let’s keep those radios tuned and those ears open for the incredible stories and insights RNZI has in store for us.

 

Happy listening.

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Michael

Competition time! Uniting Through Shortwave:

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Tecsun Radios Australia Invites You to Share Your best Radio Shack Memories.

In a world buzzing with digital noise, there’s a timeless charm to the crackle and hum of a shortwave radio. It’s more than just a hobby; it’s a journey through time and space, a solitary pursuit that connects us across vast distances. At Tecsun Radios Australia, we understand the magic of shortwave, and we want to celebrate it with you.

Shortwave radio may seem like a solitary hobby, but it has a unique power to bring people together. Whether you’re tuning in to distant broadcasts or chatting with fellow enthusiasts online, there’s a sense of camaraderie that transcends borders and time zones. It’s about more than just the technology; it’s about the memories we create and the connections we forge.

That’s why we’re excited to invite you to participate in our latest competition. We want to see your favourite radio shacks and radios, old and new, and hear the stories behind them.

Whether it’s a vintage set passed down through generations or the latest Tecsun PL 990x, we want to celebrate the rich tapestry of shortwave radio culture.

To enter, simply snap a photo of you holding your oldest radio!  Tell us about the memories it holds, the places it’s taken you, and the people you’ve met along the way. We will also need your permission to share this across our social media, blog, and EDM (our email newsletter)

One lucky winner will receive a free copy of “Southern Signals” by Hugh Tranter – a fascinating exploration of Australia’s history through the lens of communication.

“Southern Signals” reminds us that communication has always been at the heart of human history. From sea-stained dispatches to data sent back from deep space, it’s a story of how we’ve bridged vast distances through war and peace, exploration and growth. It’s a reminder of the power of technology to shape our world and bring us closer together.

So dust off your old radios, fire up your new ones, and join us in celebrating the magic of shortwave radio. Together, let’s create new memories and honour the rich legacy of this timeless hobby. Share your photos, share your stories, and let’s keep the spirit of shortwave alive for generations to come.

Please note this competition runs till the end of March 2024.

To enter the competition simply send a photo of you with your oldest radio and send it via email to hello@tecsunradios.com.au we will reply once received!

Join the conversation on social media using the hashtag #TecsunRadioMemories. We can’t wait to see what treasures you uncover and the memories you share.

Want to know more about this fantastic prize book?  Click here https://www.nla.gov.au/stories/national-library-publishing/book-title/southern-signals

 

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Michael

RNZ Advances Pacific Broadcasting with Transmitter Upgrade – Futureproofing Initiatives Underway

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In a strategic move towards enhancing broadcasting capabilities in the Pacific region, Radio New Zealand (RNZ) has bid farewell to its long-serving 34-year-old shortwave Thompson transmitter, colloquially known as “Transmitter 1.” This transmitter, one of two facilitating analogue and digital radio broadcasts to the Pacific, has been powered down for the last time in preparation for the installation of a cutting-edge Swiss-made Ampegon shortwave transmitter at RNZ’s Rangitaiki site.

This undertaking represents a significant milestone for RNZ, which has relied on shortwave radio for the past 75 years to disseminate broadcasts across the vast Pacific. The replacement of the aging Transmitter 1 signifies a pivotal step in the futureproofing of RNZ’s service.

Installed just outside of Taupō in 1989, Transmitter 1, a 100-kilowatt Thompson unit, played a crucial role during the Commonwealth Games in Auckland in 1990. However, with the challenges posed by obsolete parts and the transmitter’s exclusive capability for analogue transmission, its replacement became imperative.

The forthcoming Ampegon shortwave transmitter, capable of both digital and analogue transmission, is en route to New Zealand after being meticulously crafted at Ampegon’s factory in Switzerland. Yet, before the new transmitter can be operational, Transmitter 1 must undergo decommissioning, with salvageable parts reserved for future use.

RNZ’s Transmission Engineer Specialist, Steve White, acknowledged the complexities of the switchover, highlighting the need to dismantle Transmitter 1 integrated into the existing building. White explained, “It will take around four weeks to completely dismantle Transmitter 1… We need to isolate the transmitter from the main switchboard, as well as drain the fluids that help cool the transmitter before breaking it into parts.”

The installation of the Ampegon transmitter is anticipated to commence in January, with an estimated six weeks for installation, six weeks for commissioning, and additional time for training. The operational date for the new transmitter is projected to be 1 May 2024.

Once Transmitter 1 is replaced, RNZ will boast two transmitters capable of both analogue and digital transmissions, ensuring a robust backup system in case of technical issues.

In the interim, RNZ Pacific Manager Moera Tuilaepa-Taylor assured that alternative means of accessing RNZ content would be communicated to all Pacific partners. While the analogue service experiences a reduction during the transition period, RNZ content can still be accessed via satellite, downloads, or livestreaming through the official website.

RNZ Chief Executive and Editor in Chief, Paul Thompson, emphasized the indispensable role RNZ plays in the Pacific region, providing critical information during events such as the Tonga eruption when undersea cables were severed. Recognizing its significance, the Government allocated $4.4 million in capital funding for a new transmitter for RNZ Pacific as part of Budget 2022, reaffirming its commitment to the international service provided by RNZ in both English and Pacific languages.

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Michael

Lessons from the Optus Network Outage- Lucky you know about shortwave!

The recent Optus Network outage in Australia, which left over 10 million people without phone service and internet access for a prolonged nine hours, is yet another reminder of the importance of preparedness. As more Australians questioned the wisdom of relying on a single network for both home internet and mobile phone service, it’s a wake-up call for everyone to consider alternative methods of staying in touch with the outside world, like shortwave radio. In this blog, we’ll explore how this outage affected millions and how radio can be a reliable lifeline during such emergencies.

The Impact of the Optus Network Outage

The Optus Network outage had a profound impact on daily life for millions of Australians. Businesses, especially those heavily reliant on EFTPOS machines, were among the hardest hit. One hospitality business in Sydney’s inner suburbs, operating in a predominantly cashless society, saw an 80% drop in customers during the outage. For many, particularly the younger generation, who have never experienced life without a phone, it was a bewildering experience. Many of the older generation enjoyed a day off.

Preparedness is Key

Events like the Optus outage serve as a stark reminder to be prepared for any emergency event or network outage. The outage disrupted not only daily life but also critical emergency services. Some mobile phones couldn’t reach triple-0 (Australia’s emergency number), and hospitals across the country, including virtual emergency departments in remote areas, were severely impacted. Lives were at risk due to the inability to communicate with emergency services during this crisis.

Why Shortwave Radio Matters

AM, FM and Shortwave radio, a technology over a century old, demonstrated its enduring value once again during the outage.

When everything else, including the electrical grid, internet, and cell service, fails, radio stood strong. It can relay information immediately if it’s equipped with backup power, making it a reliable source of communication during emergencies.

Tips for Shortwave Radio Preparedness

  1. Ensure that you and your family have AM/FM/shortwave radios readily available. You never know when you might need them.
  2. Learn how to operate your radio. Practice tuning in and show your family and friends how to tune in to local and international stations to stay informed during an outage.
  3. Store your radio in an easily accessible location. In an emergency, every second counts.
  4. Keep your radio charged or stock up on fresh batteries to ensure it’s always ready to use.

It’s easy to take for granted in our interconnected world, but when it’s suddenly unavailable, the consequences can be dire. Shortwave radio, a time-tested technology, can be a lifeline in times of crisis, offering a reliable means of communication when all else fails. Don’t wait until you need it; be prepared, keep your shortwave radio ready, and ensure that everyone in your family knows how to use it. In a world of uncertainty, this simple yet powerful tool can make all the difference.

We have two fantastic emergency radios available in our web store at very affordable prices.

 

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Michael

Unlocking the Magic of Shortwave Radio: Discovering the Hidden Secrets of SWLing- A philosophical view to the hobby!

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Shortwave radio listening, or SWLing, is a unique hobby that holds a special allure for enthusiasts. It’s a bit like finding hidden treasures in a vast, mysterious landscape, akin to discovering Easter eggs in video games. The enjoyment of SWLing stems from uncovering something that has always been there, waiting to be found, yet often overlooked or dismissed.

If you’re a dedicated shortwave radio enthusiast, you know that a significant part of the enjoyment comes from DXing. DXing, or long-distance listening, is the practice of tuning into distant radio stations, often from other countries or continents. It’s the equivalent of embarking on a grand adventure, where the reward is the joy of discovering elusive signals amidst the cacophony of static and interference. However, DXing is just the tip of the iceberg when it comes to maximizing your SWLing experience. Here, we explore additional tips to help you get the best out of your shortwave radio journey.

 

  1. Understand the Basics: The 25-30-20-25 Rule

To fully appreciate the magic of shortwave radio, it’s essential to grasp the fundamentals. SWLing is not just about the radio itself; it’s a synergy of factors that contribute to the overall experience. Imagine it like this: 25% of the magic lies in the radio you use, 30% is in your outdoor antenna setup, 20% depends on your knowledge of the right time and frequencies for listening, and the remaining 25% revolves around your location. For optimal results, invest in a good radio, set up an efficient antenna, master the art of timing, and seek out quiet places for listening.

 

  1. Dive into the Metaphorical World of SWLing

There’s a beautiful metaphorical world that can be associated with SWLing, allowing you to look beyond the surface and appreciate the deeper meaning of this hobby. Consider some of these associations:

Tuning into Enjoyable Frequencies: Just as in SWLing, in life, you can choose to tune into the enjoyable frequencies. Identify the things that bring you joy, fulfillment, satisfaction, and make a conscious effort to incorporate them into your daily routine.

Reducing Noise and Adjusting the Tuning: Life often presents noise in the form of irritations, annoyances, and distractions. Like adjusting the tuning on your radio, you can reduce this noise by addressing these irritations and finding ways to enhance your comfort and enjoyment.

The Tuning Is Off: Sometimes, the outcomes in life may not align with your desired goals. Just as in SWLing, where the tuning can be slightly off, in life, you may need to recalibrate your efforts and strategies to get closer to your desired outcomes.

Incorporating these metaphorical perspectives into your SWLing experience can add depth and meaning to your hobby, helping you draw parallels between the art of listening to shortwave radio and the art of living a fulfilling life.

SWLing is a journey of exploration, both in terms of uncovering hidden radio signals and discovering the subtle, metaphorical messages it holds for our lives. By understanding the 25-30-20-25 rule, investing in quality equipment, and embracing the metaphorical aspects, you can truly unlock the magic of shortwave radio and enjoy the profound rewards it offers. So, keep tuning in, and let the hidden secrets of the shortwave world continue to captivate your imagination and enrich your life.

 

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Michael

Have You Heard of Slow Morse Code? Here is all you need to know!

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slow morse code nets radio

We often invite our community to write in and let us know about any interesting events. We got a great email from Mark who runs a slow morse code net every week! 

We will share his details in next week’s newsletter. Stay tuned.

Some of the younger folk in the office said, slow morse code? what is that? So we thought it was high time we created a blog on this very topic.

So, what is Morse code? It is a communication system developed in the early 1800s, that involves creating messages, where each letter of a word is sent as a sequence of dots and dashes. This system is transmitted via sound or visual signals, typically with the help of devices like telegraphs, lamps, or radios. Slow Morse code, often referred to as “QRSS” (which stands for “QR” for “to receive slower,” and “SS” for “to send slower”), is a variant of traditional Morse code designed for low-speed communication and radio enthusiasts. Here’s how it works, how to access it, and why people enjoy this hobby:

How Slow Morse Code Works

  1. Encoding: Slow Morse code uses the same fundamental principles as traditional Morse code. Letters, numbers, and symbols are represented by combinations of short signals (dots) and long signals (dashes).
  2. Speed Reduction: The primary difference is in the speed of transmission. While traditional Morse code can be relatively fast, slow Morse code is intentionally slowed down. Each character can be extended to several seconds, making it much more accessible for newcomers and hobbyists.
  3. Transmission: Slow Morse code is transmitted using radio waves or light signals. Radio enthusiasts often use specialized devices and software to encode and decode these signals.
  4. Decoding: The receiver uses a device, like the Tecsun Radios Australia SDR (Software-Defined Radio), to capture the radio signals and convert them into visual or audible Morse code.

Accessing Slow Morse Code

  1. Equipment: To access slow Morse code, you need a suitable radio receiver. Tecsun Radios Australia SDR is an example of a device that can be used for this purpose. It allows you to tune into specific frequency bands.
  2. Tuning In: With your SDR, you can select the frequency range where slow Morse code transmissions are taking place. Radio hobbyists often monitor certain bands allocated for amateur radio Morse code communication.
  3. Waterfall Display: The Tecsun Radios Australia SDR and similar devices often include a “waterfall display.” This display shows a visual representation of the spectrum over time, making it easier to identify and decode slow Morse code signals. Operators can visually follow the patterns of dots and dashes on the display.

Why People Enjoy Slow Morse Code as a Hobby

  1. Technical Challenge: Slow Morse code provides a technical challenge for enthusiasts. It requires understanding of radio equipment, propagation conditions, and signal decoding.
  2. Nostalgia: Many hobbyists are drawn to Morse code due to its historical significance in radio communication.
  3. Community: Slow Morse code has a dedicated community of enthusiasts who share information, tips, and participate in events Just like Mark’s local net we will share with you in next week’s Newsleter.
  4. Relaxation: The slow pace of Morse code can be calming for some people. It allows for a more relaxed and methodical approach to communication.
  5. Unique Skills: Learning Morse code is a unique skill, and many enjoy the sense of accomplishment that comes with mastering it.

Slow Morse code is a variant of Morse code that is enjoyed by radio enthusiasts. The slow pace, technical aspects, and sense of community make it an attractive hobby for those interested in both history and modern radio technology. The ability to watch the whole band segment on a waterfall display aids in decoding the signals, adding an extra layer of enjoyment for enthusiasts.

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Michael

Exploring the Magic of Shortwave Radio: A Science Adventure for Kids!

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This blog is perfect to share with younger generations, be that grandkids, nieces, nephews, and friends! We even have some fantastic dot to dot drawings printed in the back of our shortwave radio listener guides that come free with all radios purchased on our webstore. Perfect for the upcoming school holidays!!!

Hey there, curious minds! Are you ready to embark on a scientific adventure that combines learning, exploration, and a touch of magic? Today, we’re diving into the captivating world of shortwave radio and discovering how this fascinating technology can be an educational powerhouse for kids like you. So, buckle up, grab your lab coats, and let’s dive into the science of shortwave radio!

What is Shortwave Radio?

Shortwave radio is a form of radio communication that uses high-frequency signals to transmit messages over long distances. Unlike FM or AM radio, shortwave signals can bounce off the Earth’s atmosphere and travel across continents, making it possible to tune in to stations from around the world.

The Science Behind Shortwave Radio:

Shortwave radio operates on a principle called “skywave propagation.” It involves the reflection and refraction of radio waves in the Earth’s ionosphere, a layer of charged particles high in the atmosphere. When shortwave signals encounter the ionosphere, they can be refracted or bounced back to the Earth’s surface, allowing them to travel far beyond the transmitter’s line of sight.

Exploring Radio Wave Behavior:

Understanding the behavior of radio waves is like uncovering a secret code. With shortwave radio, you can experiment and observe how different factors affect signal strength and quality. For instance, you can build your own simple antennas using everyday materials to discover how their size, shape, and positioning affect reception. It’s a hands-on way to learn about physics, electromagnetism, and the importance of engineering in communication systems.

Language Learning and Cultural Exploration:

Shortwave radio provides a unique opportunity to explore different languages and cultures from the comfort of your own home. Tune in to stations broadcasting in various languages and experience the beauty and diversity of global communication. Immerse yourself in different accents, music, news, and stories, expanding your language skills and developing a global perspective.

Building Emergency Preparedness Skills:

Shortwave radio is not just about science and culture; it also plays a vital role in emergency communication. During emergencies or natural disasters, traditional communication networks may fail, but shortwave radio can remain operational. Learning how to use and listen to shortwave radios equips you with valuable emergency preparedness skills. It empowers you to stay informed, connect with others, and even assist in disseminating vital information during times of crisis.

Igniting a Lifelong Passion:

By exploring the science of shortwave radio at a young age, you may ignite a passion for science, technology, and communication that will last a lifetime. You could become an amateur radio operator, build your own radios, or even pursue a career in engineering, telecommunications, or physics. The possibilities are as vast as the airwaves themselves!

So, young adventurers, as you journey through the captivating world of shortwave radio, remember that science is all around you, waiting to be explored. By tinkering with antennas, observing radio wave behavior, embracing cultural diversity, and preparing for emergencies, you can become a true radio explorer. Unleash your curiosity, ask questions, and let the magic of shortwave radio inspire you to reach for the stars!

Are you ready to embark on this exciting scientific journey? Grab your headphones, tune in to the frequencies of knowledge, and let the science of shortwave radio whisk you away to places both near and far.

Happy exploring, young scientists!

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Michael

2023 World Amateur Radio Day- April 18th

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 A celebration of how amateur radio has been serving people for over 100 years.

With over 3 million radio amateurs worldwide this day is the perfect time to tune in and connect with fellow hobbyists.

Date: Tuesday, April 18, 2023

Time : All Day

This year’s theme is “Human Security for All, HS4A” 

The theme is born from a first time partnership between the United Nations Trust Fund for Human Security and the World Academy of Art and Science in conjunction with IARU, in a campaign to highlight the role that amateur radio plays in addressing the world’s most pressing needs.

Human Security measures security at the individual level. First introduced by the U.N. in 1994, the concept identifies seven interrelated dimensions of security that are essential to an individual’s wellbeing: economic, food, health, environmental, personal, community, and political.

The partners believe Amateur Radio is uniquely positioned to address people-centered, context-specific security challenges by promoting technical knowledge, practical skills, innovative technology, and the deployment of backup systems at the community level that can be called upon in times of emergency. The pandemic, climate change, natural disasters, and armed conflicts on several continents undermine our security, and respect no boundaries. Amateur Radio has repeatedly demonstrated its ability to address human security needs. It is a truly global communications medium comprising some three million radio enthusiasts connecting communities and the peoples of the world.

Every year on April 18, Radio Amateurs worldwide take to the airwaves in celebration of Amateur Radio Day. This year the IARU and its member-societies will be conducting a special two-week on-the-air event 11–25 April. Special event stations will be operating from around the world, making two-way radio contacts to call attention to the HS4A campaign. There are a number of stations involved.

Simply click this link to participate https://hs4a.iaru.org/,to read more and participate,  look for the blue participate button on the top right of the page and register.

We would love to hear if you are planning to participate.

Products we recommend for this event are the XIEGU G90 HF Transceiver, our HF Amateur Radio Dipole Antenna, and of course, our ultra-comfortable TRA communications headphones, so you can block out the world and improve your listening comfort!

 

 

 

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Michael

John Moyle Field Day

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John Moyle field day                                                                                                                                                                                                               Image source here

The next Field Day will be held over the weekend of the 18th-19th March 2023 and will run from UTC 0100 on the Saturday to 0059 on the Sunday.

 This is great opportunity to test your Tecsun radio and antenna as amateur radio operators participate in the HF ( shortwave) part of this contest. 
The aim is to encourage and provide familiarisation with portable and field operation, and provide training for emergency situations. The rules are therefore specifically designed and focussed to encourage field operations.

The John Moyle Field  Day Radio contest is held in honour of the late John Moyle, an engineer,  music and art lover and a long term editor at the Wireless Weekly, Australia’s first news-stand wireless magazine (not counting the AWA monthly), published in 1922 which later became, Radio & Hobbies – later Radio Television & Hobbies) magazine from 1947- 1960.

During his service in the RAAF during WWII, he was responsible for keeping radio and radar equipment working using innovative solutions during very difficult war time conditions.

The WIA decided to dedicate a long term memorial to John Moyle in the form of an annual Field Day with a focus on portable or field operation. 

Over the years the contest has evolved to not only include portable or field operators but also include home stations who may also take part using a different scoring system.

A fantastic radio to use for the HF part of the contest is the Xiegu G90. This unit is portable and can be run off your car battery.

The HF amateur radio dipole Antenna covers the popular 5/7/10/14/18/21/24/28 and 50Mhz bands. The antenna is rated at 100Watts PEP power handling capability and is supplied in a convenient canvas carry bag.

The antenna comprises a 1:1 balun and 2 bobbins containing the appropriate amount of wire to cover the specified bands.

ham radio transceiver

Shop the range here

Contestants can enter for either 6 hours or 24 hours.

The Xiegu G90 is the ideal transceiver for the HF part of this contest. For those who are not amateurs this is the ideal weekend to listen to amateur radio in action and to evaluate antennas etc.

The aim of the contest is to score the most points, by making as many contacts as possible.

On the HF bands, 2 points are earned per contact. Other points scales apply to VHF/UHF, dependant on the distance over which the contact is achieved.

The contest is open to all VK, ZL and P2 stations. All other stations are welcome to participate, but can only claim points for contacts with VK, ZL, and P2 stations. All VK, ZL, and P2 stations can claim points for all contacts, with any station in the world, as long as valid serial numbers are exchanged.

The contest rules ensure more logs are submitted, by requiring that if any station works the same station a total of more than 10 times on any band or on any mode then the logs from both stations should be submitted to verify those contacts.

Single operator portable entries shall consist of ONE choice from each of the following (e.g. 6 hour, phone, VHF/UHF):

a 24 or 6 hour;

b Phone, CW, Digital or All modes;

c HF, VHF/UHF or All Bands.

Multi-operator portable entries shall consist of ONE choice from each of the following (e.g. 24 hour, phone, VHF/UHF):

a 24 or 6 hour;

b Phone, CW, Digital, or All modes;

c HF, VHF/UHF or All Bands.

Home entries shall consist of ONE choice from each of the following (e.g. 24 hour, phone, VHF/UHF):

a 24 or 6 hour;

b Phone, All modes;

c HF, VHF/UHF or All Bands.

Multi operator stations are not permitted in the Home Category.

 

If any Station works the same station more than 10 times in total using any band and, or using any mode, they should submit their own log to verify those contacts for the other station.

 For full information about the contest, contest history, rules and definitions please head to the Wireless Institute of Australia website.

 

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Ricardo Rosario

Solar Cycles and how they affect shortwave propagation

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In 1843 the phenonema known as the Solar cycle was discovered by Samuel Schwabe a German astronomer who observed transitions of the Sun from periods of high activity to low activity every 11 years, over a period of nearly 20 years.

Put in simple terms, the Sun is composed of a huge ball of electrically charged hot gas. As this gas moves, it generates a powerful magnetic field. This magnetic field transitions through an 11 year cycle (known as the Solar Cycle) during which the magnetic poles of the Sun are transposed, ie the north and south poles change places.

This cycle affects activity on the surface of the Sun, such as sunspots and solar flares. The energy released by these events charges particles in the ionosphere, affecting radio propagation. More solar flares and sunspots occur at the peak of the cycle than at the bottom of the cycle. Typical values are 80-100 sunspots at the cycle peak and 15 or so at the cycle minimum.

When a strong flare occurs, the increased x-ray and extreme ultraviolet radiation produces ionisation in the lower, D (absorption) layer of the ionosphere, disrupting HF radio broadcasts by absorbing rather than reflecting signals. 

We are currently at the end of Solar Cycle 24 (calculated as mid 2020), and from this point we can expect an increase in solar activity and changed radio propagation as the maximum useable frequency (MUF) for shortwave communications increases with an increase in solar activity.

At the peak of the Solar Cycle, the higher frequencies of the shortwave spectrum are very good. Low power stations can be heard over remarkably long distances. 

At the bottom of the cycle, the current position, those higher frequency signals will not usually support normal propagation via the ionosphere. So propagation at lower frequencies will be better whilst higher frequencies will suffer. 

 

Article written by Tecsun Radios Australia

Image of sun via Nasa.

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