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Showing posts with label homebrew. Show all posts
Showing posts with label homebrew. Show all posts

Friday, July 10, 2026

The decline in Amateur Radio during winter is neutralized by creating activity!!


Who said there is a decline in Amateur Radio during the winter months?  I said so.  Look HERE.

My OM had a saying that if a door is closed into your face, you must always find another door to open and continue with what you are doing and enjoying.  This means do not give up and you will be able to continue also in amateur radio.  So true and this saying I have been following throughout the years.  It allowed me to bounce back in life sometimes even with better results than before.

Well amateur radio activity is up here in the Mossel Bay area as well as parts of South Africa.   Let's look at some of the activity by means of illustrated images:  


Image above:  Connected nodes to the ZS1I HUB in Mossel Bay  (Click on image for larger view.)

Image Above:  Bubble Chart of stations connected to the HUB yesterday afternoon.  (Click on image for larger view.

1.  ZS1I HUB Network Activity:  I will let the images speak for themself.  The HUB is alive and active on a daily basis with stations frequently heard also via all the cross-links and connected nodes and repeaters.  A few overseas stations were also heard on the ZS1I HUB Network.  I do not take any credit for this as the network consists of many participating entities.  Great to hear all the activity taking place.

 Image: Some "useless" information? (Click on image for larger view.)

Image:  Winter playing a role in the decline? (Click on image for larger view.)

2.  ZS1I  Amateur Radio Projects / Activities Blog:  This blog is was created in April 2026 and is already being visited by many viewers on a daily basis.  Hopefully the blog is not only my place were I keep some back-up information but also a medium where young and old can learn something.  I am not a person chasing records or wanting any attention in amateur radio.  I am to old for that nonsense.  The Blog for me is like a amateur radio "diary".  Many article might also be bored and not of interest to others.  None the less thank you to all the visitors for visiting the ZS1I Blog.   I hope to keep up rolling articles out that might be of interest to the general amateur radio community. 


Image:  Brandmeister Hoseline  (Click in image for larger view.) 

3.  DMR Activity still on the increase World Wide!  - Need I say anything about the increase in the use of DMR World Wide and in South Africa?   This is great news for amateur radio operators and the future of digital radio modes.  With the cross-linking of analogue systems to digital systems nobody is left out in the cold even if you only have a analogue HT radio.  At times the ZS1I HUB Network is linked to various DMR Talk Groups which resulted in an increase in activity.  The audio is good and the linked systems work great.  Yesterday operators were heard from Germany, Australia, UK, USA, Japan on Hoseline which was cross linked to the ZS1I DMR Bridge and DMR Repeater in Mossel Bay.  And no it was all country talk groups and not the World Wide Talk Group (91).  Great conversations and activity on DMR.  I do have a few ideas and changes that I would like to make to even better the current cross linked system.   Stay tuned!!

 
 
Image: 40 m WSPR Map South Africa (Click in image for larger view.) 

Image:  Stations that spotted the ZS1I 40m WSPR Beacon recently,  thanks to all.  (Click on image for larger view.)

4.  40m WSPR Activity:  WSPR is a great amateur radio propagation tool.  I am amazed on how propagation changes on the 40m band from time to time.  At one stage only a few stations received the 40m ZS1I WSPR Beacon.  Then all of a sudden there was a increase in spotted stations.  I must admit that I have lots to learn about WSPR.  Sure this will come with time.  In the mean time many thanks to all who regularly spot the Mossel Bay WSPR Beacon.  More interesting developments to come relating to WSPR Beacons in the future. 

5.  ZA-Net Network Activity:  For the past few days I have connected the HUB to the ZA-Net Network up in Gauteng.  At times there were activity even from abroad.  The audio quality was good and the network is working great.  Herewith more information about the network:

ZA-Net Network Web-Site:  Click HERE

Saturday, July 4, 2026

Update: What progress is being made with the ZS1I - 6 Meter CW Beacon in the Southern Cape Area?

Well I have been asking this question to myself several times since this project was launched.  The project has not been shelved although due to other "gremlins" in the shack the priority and importance was down-scaled a few times until other breakages were fixed.  I am sure that you will agree with me that the 6m Band in the middle of Winter is fairly dead and the priority is on the low side.  Just to re-cap here is the links to the project for those that might have missed it.

1.  Building Low Budget Antennas - DIY Delta Loop Antenna for the 6 Meter Band ( 50 - 54 Mhz)

2.  Building Low Budget Antennas - DIY Moxon Antenna for the 6 Meter Band (50 Mhz)

3.  The ZS1I - 6 Meter Magic Band Project in the Southern Cape Area of South Africa. (Part 1)

4.  Heads Up - Here comes the Next Generation Amateur Radio Beacon (s) for the Southern Cape!! (Part 2)

5.  Update: Next Generation Amateur Radio Beacon (s) for the Southern Cape!! (Part 3) 

Now when I found the time I worked on the 6 Meter CW Beacon.  I also ordered a few parts that I am waiting for to continue the project.  The image below depict the work done so far on the beacon.  There is not many things left to do, that's if the "gremlins" stay away from the work-bench.

I will keep those interested updated about the project and when the beacon is switched on and on the air.  Updates to follow!


 Image:  ZS1I 6m Meter CW Beacon - work in progress

Wednesday, June 24, 2026

The ZS1I 40M WSPR Beacon is back on the air in Mossel Bay, South Africa

My previous post relating to the 40m WSPR Beacon available HERE refers.

The ZS1I 40 Meter Beacon located in Mossel Bay, South Africa is back on the air using the solar power supply.  So far the supply is running smoothly without any hick-ups.

Particulars of the ZS1I Ultimate 3S Beacon:

  • Call: ZS1I
  • Freq.: 7.038 600 Mhz
  • Band:  40 Meters (7 Mhz)
  • Grid:  KF15BT
  • Power:  250 mW
  • Mode: W-2  (WSPR2)
  • Antenna:  EFHW (49:1 Balun)
  • TX Period:  Every 10 Minutes
  •  Beacon on the air from:  7 October 2025 @ 10h00 SAST
  •  First Spotter: 10h20 ZS5SAM (Div 1)   Barrydale. (Distance 134 km)

Time to get the 6m CW Beacon on the air.  I will be working on this beacon in the coming days if "Murphy" stay out of my Shack. 


Image: ZS1I DX Report - Pedro LU7ABF  (Click on image for larger view.)  

Tuesday, June 23, 2026

The 40m WSPR Beacon needed a new Power Supply - AKA Solar Power Supply

Image: Solar Power Supply  (Click on image for larger view.) 

The ZS1I 40M WSPR Beacon has been off the air for the last two weeks due to the failure of a cheap 220v AC - 12v DC switch mode power supply.  I opted not to replace the power supply with another switch mode power supply.  I decided to go the solar power supply route and constructed the above supply for the beacon.

You might ask but why such a tall format solar power supply.  As usual I use what I have available in the junk box.  This power supply can also be used as a all in one supply.  The solar panel for the beacon is installed outside apart from the supply itself but if I want I can add the panel to the two aluminium stays at the back of the supply.  The solar supply can then be moved in the direction of the sun but not only that the operator will have access to the solar controller display information at any time while operating his radio from the supply. 

There is really no need to explain how the solar power supply was constructed.  The photos below provide you with more than enough information to build your own.  Remember to add fuses on the input and output of the supply should anything go wrong.

Herewith further information about the power supply: 

Model:  TX1210
Battery Voltage:  12 v
Charge Current:  10 A
Discharge Current:  10 A
Max Solar Input: <50 v
Equalization:  14.4 v
Float Charge:  13.7 v (Adjustable)
Discharge Stop:  10.7 v (Adjustable)
Discharge Connect: 12.6 v (Adjustable)
USB Output:  5 v / 3 A

The WSPR Beacon is now back on the air and running of the solar power supply. I am monitoring the beacon as well as the solar power supply to ensure that the beacon is now functioning optimal again.

More information about the beacon available HERE and HERE

Images:  (Click on images for larger view.)









Wednesday, June 10, 2026

Sad to see a decline in Amateur Radio during the Winter in South Africa?


Image:   AI  (Click on the image for larger view.) 

Having been in amateur radio for more than 30 years it is sad to notice that there is nowadays an enormous decline of amateur radio activities during the winter times.  Having said that let me just point out that this was not the case in the days gone by.  I have noticed that on-air activity is very low and in some instances exceed to exist during winter times.  Looks like radio amateurs move into hibernation.   Why this topic and what does it have to do with me? Well firstly it is just an observation on my part and secondly the decline in activity is not good for amateur radio.  I hear you say but there are ongoing activity.  Yep you correct and I did not say that in general nothing is happening in amateur radio but definitely on-air activity has declined. 


Image:   AI  (Click on the image for larger view.) 

Now tell us what was it like in the olden days during the winter.  Man-o-Man now you are talking.  Winter time was the time when radio amateurs get together on the air literally in their droves.  "Foot-warmers" nick name for tube amplifiers  and tubes of valve radios were working overtime in the Shack.  Another benefit was that the heat coming from the old valve equipment also heated the inside of the Shack.  You did not need an electric heater to heat the Shack.  With valve radios you kill two flies in the Shack at once.  O! ...  now I see what the problem is nowadays.  All the new transistor- and chip radios are cold and you need an external heater to warm the Shack if you lucky to have electrical power.

Enough!  I am not trying to say that things were better in the olden days.  I just found that there are less activity in the winter nowadays.  Are the days of spending times in a warm cosy Shack in winter now forever gone?  I hope I am wrong about all of this.

Hope to hear of more on the air and off the air (home brewing) activity during the long winter months.  If you do not want to sit in the Shack then sneak a radio into your bedroom but for Pete's Sake just be more active during the winter.  We have a saying here in the Southern Cape if nothing is heard on the air that -  "Dit is net dooie kole!"   In other words the coals that keep the "fire burning" (amateur radio going) is dead. 

To assist some of my fellow radio amateurs read more here:

Winter hibernation for your rig is a common choice, but you don't have to stay off the air! Discover warm-weather and cold-weather operating tips in the Winter Ham Radio Tips OH8STN video, or browse community perspectives on the Hibernating until spring due to cold weather - Facebook

Let's keep those "coals burning" and stop the radio hibernation!

Wednesday, May 27, 2026

Why do I use AI in Amateur Radio and so many AI Generated Images for this Blog?

 
(Click on images for larger view.)
I am a believer in the Future but also behold the Past - Johan ZS1I
This phrase means that while you are hopeful and forward-looking, you also respect, learn from, and acknowledge the history that brought you here. It represents balance—embracing progress and the potential of tomorrow, while staying grounded in the experiences, traditions, and lessons of the past. 
  • The Future (Optimism/Faith): "Believing in the future" represents hope, progression, and forward momentum.
  • The Past (Reflection/Roots): "Beholding the past" represents honoring history, remembering where one came from, and recognizing that we are anchored by our heritage. 
  • Amateur Radio has transformed from a nostalgic, wire-and-tube hobby into a futuristic, bleeding-edge tech community. Today, it encompasses AI-assisted software, Software-Defined Radios (SDR), global mesh networks, and orbital satellites and many more. It allows you to build autonomous digital networks completely independent of the internet or cell infrastructure. 
    It is my believe that we need to use amongst other AI generated images as a draw-card for the younger generation.  Hopefully this will generate an interest in amateur radio, science and technology. 
    Am I completely off my rockers in saying that I use AI images as a draw-card for the youth?
    No!  To today’s youth, Artificial Intelligence (AI) isn’t a sci-fi concept; it is an omnipresent tool for education, a creative outlet, and a 24/7 companion. Studies by organizations like the Pew Research Center reveal that the younger generation has seamlessly woven AI into their everyday lives, viewing it simultaneously with great optimism and a critical eye. 
    For adolescents, AI functions in several distinct ways:
    • The Personalized Tutor: Millions of students use chatbots like ChatGPT and Claude to act as on-demand tutors. They rely on AI to structure essays, brainstorm research questions, organize study schedules, and explain complex topics in simpler terms.
    • A Creativity Booster: Youth leverage generative AI to compose music, generate digital art, and write song lyrics. It democratizes creative expression, making it easy to experiment with ideas that used to require expensive professional software.
    • A Judgment-Free Space: Research highlighted by the American Psychological Association shows that a minority of teens turn to AI companions or chatbots for companionship, comfort, and emotional support. They act as a "safe space" to ask awkward or highly personal questions without fear of being judged.
    • A Source of Anxiety: Despite high usage, youth are also acutely aware of AI's dangers. They worry about over reliance leading to a loss of critical thinking, deepfakes harming peers, and AI taking away jobs in the future. 
    IMPORTANT:  We need to add the following to AI functions in several distinct ways:   
    AI can act as a powerful catalyst to spark a deep passion for amateur radio, communication systems, technology and science in younger generations.
    Here is exactly how AI serves as a gateway to these disciplines:
    🌟 Interactive Learning and Mentorship
    • The Infinite Elmer: In amateur radio, a mentor is called an "Elmer." AI acts as a 24/7 Elmer, explaining radio wave propagation, circuitry, and antenna design at any complexity level.
    • Exam Preparation: Youth use AI to create custom flashcards and quizzes, transforming dry regulatory and technical syllabi into interactive learning games.  The RAE Manager should look at this.
    📡 Real-World Radio Enhancements
    • Decoding Weak Signals: AI algorithms filter out static and atmospheric noise, allowing young operators to pull clear voice or data signals out of weak, long-distance transmissions.
    • Smart Space Tracking: Youth use AI to calculate the exact real-time orbital paths of amateur satellites and the International Space Station (ISS) for satellite radio contacts.
    • Predicting the Ionosphere: AI processes massive solar data sets to predict space weather, telling young operators exactly when and where global radio frequencies will open up.
    💻 The Intersection of Code and Airwaves
    • Automating Radio Code: Youth use AI to write Python scripts that control Software Defined Radios (SDR) or program automated digital mode transmitters.
    • Smart Antennas: AI simulations help students design, test, and optimize physical antenna shapes digitally before building them with wire and aluminum.
    🚀 Bridging to Broader Science
    • Emergency Data Networks: AI helps young operators build mesh networks, using radio frequencies to send data and messages without relying on the internet.
    • Citizen Science: Youth connect radio gear to AI software to log meteor showers or solar eclipses, contributing real data to global atmospheric research projects.
    • A beginner Python project that connects AI with a cheap USB radio receiver (SDR)
    • The best AI prompts to help a student study for their technician radio license
    • A guide to cheap hardware kits that combine radios with microcontrollers
    Because AI is already integrated into their world, experts advocate for AI literacy—teaching youth how AI works, how to spot algorithmic bias, and how to verify information rather than just blindly trusting it. 
    The above explains how AI can be incorporated into amateur radio. In short we need to keep up with the times but all in good measure!  
    The Futuristic Face of Amateur Radio for the Youth as well as the Older Generation.
    The futuristic face of amateur radio is defined by turning raw electromagnetic waves into pure data through software and space-based hardware. It moves away from voice-only static and into the realm of digital networking, orbital physics, and extreme engineering. 
    High-Tech Core Pillars
    • Digital Signal Processing (DSP): Powerful microchips isolate tiny, hidden signals out of massive atmospheric noise.
    • Cognitive Radio Technology: Systems that automatically scan the spectrum, find open frequencies, and adapt their transmission style.
    • Orbital Relays: Bouncing data packages off the International Space Station or specialized amateur micro-satellites.
    • Earth-Moon-Earth (EME): Using the moon as a natural passive satellite reflector to communicate with the other side of the planet. 
    •  Software-Defined Radios (SDR): Traditional hardware dials have been replaced by computational, wideband receivers. You can view terabytes of radio spectrum on a screen, decode signals visually, and experiment with code-driven radio interfaces.
    • Space & Satellite Communications: You can build or buy setups that track, send signals to, and bounce messages off low-Earth orbit satellites, the International Space Station, and even the moon.
    • AI & Advanced Digital Modes: Software like JS8Call and FT8 use forward-error correction and automated decoding. This allows your radio to communicate with stations across the globe using a fraction of a watt, even when the signals are too weak for the human ear to detect.
    • Emergency Mesh Networks: Operators use AREDN (Amateur Radio Emergency Data Network) to set up localized, high-speed, line-of-sight data networks that function like an offline internet—perfect for disaster prep or off-grid communications. 
    Cutting-Edge Digital Modes
    [Your Computer] ──> [SDR Transceiver] ──> [Antenna] ──> (Ionosphere / Space)
    
    • FT8 / FT4: Automated, time-synchronized protocols that decode signals buried deep below the noise floor.
    • JS8Call: A text-messaging protocol built on FT8 technology that supports store-and-forward relay messaging without the internet.
    • WSPR: The Weak Signal Propagation Reporter network, used to probe global radio pathways using less energy than a nightlight.
    • Packet Radio & APRS: Automated tracking systems that transmit real-time GPS coordinates, weather data, and telemetry over VHF/UHF waves. 
    • Digital Voice (DV) radio modes convert human speech into compressed binary data packets before transmitting them over the air. Unlike text-based digital modes, DV focuses on crystal-clear, static-free voice communication, often integrating global internet linking, GPS tracking, and text messaging alongside the audio stream. 
      The Core Technologies
      [Voice] ──> [Vocoder Chip (Compression)] ──> [Digital Modulator] ──> [RF Carrier]
      
    • The Vocoder: Every DV mode relies on a "voice encoder" (vocoder) to compress analog speech into a tiny digital stream (often under 3,600 bits per second).
    • The Digital Cliff Effect: Unlike analog FM or SSB which gradually fades into static, digital voice remains perfectly clear until the signal drops too low, at which point the audio drops out completely.

    Popular VHF/UHF Digital Voice Modes
    These modes dominate local repeaters and handheld radios (HTs), allowing operators to link local repeaters into global networks using the internet. 
    Mode Creator / ChampionVocoder TypePrimary Advantage
    DMR (Digital Mobile Radio)Commercial (Adapted by Hams)Proprietary (AMBE+2)Uses TDMA to split one frequency into two separate channels.
    D-STARIcom / JARLProprietary (AMBE)The oldest dedicated ham protocol; excellent routing capabilities.
    System Fusion (C4FM)YaesuProprietary (AMBE+2)Easiest to use; automatically switches between analog and digital.
    M17Open-Source Community100% Free & Open (Codec 2)Fully hackable, patent-free, and designed for hardware experimentation.

    Futuristic & HF Digital Voice Modes
    While VHF/UHF modes require strong local repeaters or hotspots, modern protocols allow digital voice to travel globally on Shortwave (HF) bands without any internet infrastructure. 
    • FreeDV: An open-source digital voice mode built for HF single-sideband (SSB) frequencies. It uses the Codec 2 vocoder to transmit highly compressed speech over noisy, long-distance channels where analog voice fails.
    • RADE V1 (Radio Autoencoder): A bleeding-edge digital voice mode utilizing machine learning. It compresses high-fidelity speech down to a tiny RF footprint (1,500 Hz), delivering clear audio over shortwave frequencies even at extremely low signal-to-noise ratios. 
    Next-Gen Hardware Tools
    • SDR Dongles: Small USB sticks that turn any computer, smartphone, or Raspberry Pi into a wideband radio scanner.
    • Phased Array Antennas: Electronically steered antenna setups that aim signals without moving the physical structure.
    • QRP Rigs: Highly efficient, pocket-sized transceivers designed for remote mountain peaks and off-grid survival setups. 
    Well there you have it.  In my opinion the future is bright for amateur radio and we need to use AI more and more, but with the necessary caution as in all things in life and electronica there are positives and negatives.  If you use it the wrong way around you will fail and even get hurt.
     
    In my personal opinion the AI images I post on this blog is futuristic and in some sense art-like.  It reminds me and I hope others that we must not stagnate but rather be active and futuristic in using what we have to our disposal.  A very good old friend who is now SK was able to build the most beautiful valve radio equipment of what he could scrounge and find for free.  Now his human made "creations" was in my opinion vintage-, futuristic- and artistic like.  Wonder if AI was available in his time, what "creations" he would have come up with?
     
    As far as AI in the ZS1I Amateur Radio Shack is concerned, I am currently busy with a few projects where I make use of  AI during the last few weeks to generate code and creating scripts for future use.  So far it looks quite promising. More on this in future postings. 

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