BREAKING NEWS: The Ultimate SvxLink Client For Smartphones & POCs. 145.500 QSO.link MHz

 

Forget the old dial! We no longer say 145.500 MHz, but QSO.link MHz.

Whether you use a high-end flagship or a rugged POC handset (the kind that looks like a 90s brick and could probably survive a tank), QSOLink is your professional gateway to SvxLink networks.

It runs on almost anything. As long as it has Android 9 or higher, it's a radio! (We decided Android 8 was just too "vintage", even for us). 

Dear SvxLink Community,

I am pleased to announce the release of QSOLink, a new Android application designed to connect to SvxLink Reflectors and Hotspots.

Built upon the solid foundation of the "Latry" project by Silviu (YO6SAY), QSOLink pushes the concept further with a complete UI overhaul, enhanced audio processing, and features dedicated to active operators.

Key Features:

• Advanced Audio Processing: Includes a configurable Jitter Buffer (essential for mobile/4G connections), Microphone Gain control, and AGC (Automatic Gain Control) for both TX and RX to ensure consistent audio levels.

• Network Management: Save up to 10 different network configurations (Reflectors/Hotspots) with a quick-switch grid. You can also Export/Import your networks via JSON files to share configs easily.

• Hardware Integration: Full support for Bluetooth PTT buttons (pedals, handheld mics) with a built-in "Key Sniffer" tool to easily detect and map your device's key codes.

• Integrated Logbook: The app automatically logs your reception history. You can view QSO details and export your log in ADIF format directly from the app.

• Modern UI: Designed with a dark, high-contrast interface suitable for AMOLED screens and low-light environments.

Availability:
You can download QSOLink here: https://www.swisstransfer.com/d/7d28daf3-680b-420e-bad4-8ecea383770a

I would appreciate your feedback and testing reports. My goal is to provide the most reliable and complete mobile client for the SvxLink ecosystem. Please keep in mind that this is an initial release, so there might still be some bugs.

Special thanks to Silviu (YO6SAY) for his initial work which made this project possible.

73,

Cedric, F4JGI

 

QSO LINK features:

QSOLink

is a feature-rich Android client for SvxLink reflectors, designed for connecting to Reflectors and Hotspots. It features advanced TalkGroup management with "Auto-Switch" (jumping to active, higher-priority TGs) and visual radar for station activity.

Key Features of QSOLink:

• Audio & DSP: Features a DSP audio chain with Auto Gain Control (AGC) for TX/RX and adjustable jitter buffer.
• Radio Control: Includes a Digital Tuning Wheel, Dual VFO management (A/B), and support for modes like LSB, USB, AM, FM, and CW.
• Networking & Scanning: Features intelligent network scanning, auto-switching to active TalkGroups, and real-time DX spot importation.
• APRS Integration: Features full integration with the global APRS-IS network, allowing for tracking and text messaging, with position broadcasting to services like aprs.fi.
• Interface & Usability: Includes a dedicated "Ultimate Car Mode" HUD for safety, Bluetooth support for headsets and handmics, and a resource-efficient design for mobile devices.
• Logging: Includes an integrated QSO history with ADIF format export capabilities.
• Compatibility: Designed for Android 8.0 or higher, with optimization for ARMv8 64-bit processors.

The application is highly optimized for network radio (POC) devices and includes a "Lite Edition" for older smartphones to reduce RAM and CPU usage.

 

QSOLink is a dedicated Svxlink Client for Android. It is not a standalone radio network. Users are required to configure the app to connect to their preferred third-party reflectors.

For more information, images and videos about QSOLink click HERE

Here is a highly detailed User Manual for QSOLink V1.2.0.

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QSOLink User Manual

Version 1.2.0

Welcome to QSOLink, a lightweight and efficient Reflector/Hotspot client. This guide covers every aspect of the interface, configuration, and advanced audio settings.

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1. The Main Interface

The screen is divided into distinct zones for quick access to essential features.

A. The Top Bar (Controls)

From left to right:

1. Connect Button (Link Icon):

   • Blinking: Connecting.

   • Solid Link: Connected.

   • Broken Link: Disconnected.

   • Action: Tap to Connect/Disconnect. If you are disconnected, tapping this opens the connection popup for the selected network.

2. Network Name: Displays the name of the currently selected configuration.

3. Smart TG Button (The colored rounded box):

   • Displays current TalkGroup (e.g., "TG 208").

   • Displays Monitoring status (Scan, Pause, or Revert Timer).

   • Short Click: Opens the Change TalkGroup popup to manually enter a TG.

   • Long Press: Opens the Monitor/Scan Configuration menu.

4. Audio Device Icon (Phone/Headset):

   • Shows the current audio output (Speaker, Wired Headset, Bluetooth, Car).

   • IMPORTANT: If you plug in a headset or connect Bluetooth after the app started, tap this icon once. It triggers a "Force Audio Restart" to re-detect the best audio device immediately.

5. Mute Button (Speaker): Toggles incoming audio On/Off.

6. Menu Button (Gear): Opens the main Settings.

B. Network Grid

Located below the Top Bar.

• Contains 10 Memory Slots.

• Blue/Highlighted: Active configuration.

• Grey: Empty or inactive configuration.

• Short Click: Selects the network. If disconnected, it prompts to connect. If connected to another network, it disconnects and connects to the new one.

• Long Press: Opens the Network Editor to configure that specific slot.

C. Status Frame (The "Ticker")

A rounded rectangle that displays real-time info:

• Ready: System is idle.

• Transmitting (Red): You are on air (shows TX timer).

• Receiving (Green): Shows the callsign of the person talking and their TG.

• Scan Info (Orange): Shows scanning status.

D. Log & Dashboard (Middle Section)

This area has two tabs:

1. HISTORY: A list of recent calls received.

   • Click a line: View details (Callsign, Date, Duration) or look up the user on QRZ.com.

2. DASHBOARD: Shows currently active stations on monitored TGs.

   • Mute Icon: Mute a specific TG temporarily.

   • JOIN Button: Immediately QSY (switch) your TX TalkGroup to that station's TG.

E. VU Meter

A compact bar above the PTT.

• Left (RX): Green bar showing incoming audio level.

• Right (TX): Red bar showing your microphone level. Use this to check if your Mic Gain is too high or too low.

F. PTT Button (Push-To-Talk)

• Green: Ready to TX.

• Red: Transmitting.

• Lock Icon / "RX BUSY": The button is disabled because someone else is talking (unless "Duplex" behavior is allowed by the reflector).

---

2. Configuration (Network Setup)

To set up a hotspot or reflector:

1. Long Press an empty slot in the Network Grid.

2. Fill in the fields:

   • Name: A label (e.g., "Home Hotspot").

   • Host: IP Address or DNS (e.g., srv.reflector.com or 192.168.1.50).

   • Port: Usually 5300 or 5301.

   • Callsign: Your callsign.

   • TG: The default TalkGroup to connect to (e.g., 208).

   • Password: The hotspot/reflector password.

3. Import from Clipboard: If you have a JSON config string copied, paste it in the bottom field and click "IMPORT" to auto-fill.

4. Click SAVE.

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3. Monitoring & Scanning (The "Smart TG" Button)

QSOLink includes a powerful TalkGroup monitor.

To Configure: Long-press the Smart TG Button (top center).

Settings:

• Enable Switch: Turns monitoring On/Off.

• Mode:

  • Info Only: Shows activity on screen but does not switch audio.

  • Auto-Switch (Favorites): Switches audio to the active TG if it is in your list.

  • LIVE SCAN (ALL): Listens to any traffic sent by the reflector (promiscuous mode).

• Revert Delay: If the app switches to a monitored TG, it will wait this many seconds of silence before returning to your "Home TG".

Adding TGs:

1. Priority:

   • Normal: Standard priority.

   • High (+): Interrupts Normal traffic.

   • Max (++): Interrupts everything (Red).

   • Low (-): Only listened to if channel is totally free.

2. TG ID: Enter the number (e.g., 91).

3. Click ADD.

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4. Main Settings Menu (Gear Icon)

A. SYSTEM

• Network Quality (Jitter): Crucial for audio stability.

  • 40ms - 80ms: Only for perfect Wi-Fi.

  • 150ms - 250ms: Recommended for 4G/LTE.

  • 400ms - 500ms: Use in cars or areas with bad signal. Higher = more delay but fewer audio cuts.

• Time-Out Timer (TOT): Automatically stops transmission after 60/90/120/180 seconds to prevent overheating or blocking the channel.

B. DISPLAY

• Show Networks: Toggle between 10 slots (small) or 5 slots (large).

• Show Logo / Status Bar / Logbook: Hide elements to save screen space.

C. AUDIO (Advanced)

• Mic Gain: Hardware amplification.

  • Adjust while watching the TX VU Meter. The red bars should peak near the top but not hit the max constantly.

• AGC TX (Auto Level): Automatic Gain Control for your microphone.

  • Enabled: The app dynamically adjusts volume to hit the "TX Target" (e.g., -10dB). Recommended.

• AGC RX (Limiter): Automatic volume leveling for incoming audio. Prevents loud stations from hurting your ears.

D. OPTIONS (PTT Config)

• Screen PTT Mode:

  • PTT (Momentary): Press and Hold to talk. Release to listen.

  • Switch (Locked): Tap once to talk. Tap again to stop.

• External PTT Mode: Same logic but for Bluetooth buttons/Headsets.

• Bluetooth Button Setup:

  • Enable "Bluetooth Button".

  • Click SCAN.

  • A popup appears ("Bluetooth Sniffer").

  • Press the physical button on your Bluetooth Handmic/Headset/Pedal.

  • The code appears (e.g., "Code: 126" or "Code: 79").

  • Click SAVE.

E. DATA & STORAGE

• Backup Config (JSON): Saves all your networks and settings to a file in your Downloads folder. Use this to transfer settings to another phone.

• Restore Config: Loads a previously saved JSON file.

• Export Logbook (ADIF): Exports your received calls history to a standard ADIF file for logging software (QRZ, LOG4OM, etc.).

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5. Troubleshooting / Pro Tips

Audio Routing Issues

If the audio is coming out of the wrong speaker (e.g., phone ear-piece instead of loudspeaker, or not going to Bluetooth):

1. Connect your Bluetooth device.

2. Tap the Audio Device Icon (top bar, next to Mute).

3. You will see a small animation. This forces the internal audio engine to restart and grab the correct device.

"RX BUSY" on PTT

If the PTT button shows a lock icon and says "RX BUSY":

• This means someone is currently talking.

• QSOLink blocks TX by default to prevent "doubling" (talking over someone).

• Wait for the person to finish.

Backing up before update

Always go to Menu > DATA & STORAGE > EXPORT > Backup Config before uninstalling or updating the app to ensure you don't lose your 10 memory slots.

Here is the Support & Information section, professionally translated into English, ready to be added to the end of your User Manual.

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6. SUPPORT & INFORMATION

Need Help?

If you encounter configuration issues, bugs, or have feature requests, please contact the developer:

• Support Email: f4jgi.cedric@gmail.com

• QRZ.com Page: https://www.qrz.com/db/F4JGI

Support the Project

QSOLink is free software developed during spare time. If you enjoy using this application and wish to contribute to server costs or encourage future development, you can make a donation via PayPal:

• PayPal Donation: redgis01@free.fr

• Or simply click the "Donate" link at the bottom of the main screen in the app.

Credits & Acknowledgments

QSOLink is an evolution based on the open-source project Latry.

• Android Development & Adaptation: Cedric F4JGI.

• Original Core Code: Special thanks to Silviu YO6SAY for his formidable work on the original Latry engine.

Legal Information

QSOLink V1.2.0
Copyright © 2025 Cedric F4JGI.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License.

Disclaimer: This software is provided "as is", without warranty of any kind, express or implied. The author cannot be held liable for any direct or indirect damages resulting from the use of this application. Please use it responsibly and in accordance with the amateur radio regulations in your country.

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End of Document - QSOLink User Manual - Rev 1.0

 

AllStarLink / HamVoip has the best VOIP audio quality in Amateur Radio

During a resent "Sonsak Span" Net Pieter ZS3PV was visiting the Saldanha area. He used the AllStar node of Wikus ZSWLM-L that was connected to the ZS Link AllStar Hub in Mossel Bay.  Pieter could not believe the excellent audio quality that he received via the two allstar nodes.  He was adamant that  the audio quality is the best he ever heard on VHF and that he considers to setup an AllStar node in Kleinsee at his QTH.

Now I have to get the following of my chest before I continue.  I sometimes hear that fellow radio amateurs comment that  Echolink / AllStarLink / VOIP is not amateur radio as it uses the Internet and not RF radio communications.  

 

 

Image:  ZS-Link Network HUB, Mossel Bay  (Click on image for larger view.)

Is Echolink / AllStarLink / VOIP really not Amateur Radio? 

Now  Tom Salzer KJ7T comments in this regard is absolutely spot-on and I quote:

 

"Each approach has its place and each provides enjoyment and fulfillment for me.  I hear this question all the time, either posed as a sincere question or as a loaded comment deriding those who use AllStarLink. I submit that AllStarLink is as much connected to amateur radio as is Morse Code. In the beginning, Morse Code was transmitted over wires, not over the air. Radiotelegraphy required changing the use of Morse Code from something that actually printed on paper to tape to audible pulses of long and short sounds.

AllStarLink is not Morse Code, but like CW, it is a digital mode. Both of these communication modes can be used over the air or over a wire. That intersection with RF radios is why I think AllStarLink falls squarely in the realm of amateur radio. AllStarLink is also a grand experiment in adapting Asterisk for amateur radio use, an activity that is part and parcel of amateur radio. As amateurs, we adapt technologies and adopt methods from other fields. Some of us are theorists and some are pragmatists. All of us find something to enjoy in this very broad hobby of hobbies we call amateur radio."

Thanks, Tom for answering that question!!

I decided to provide more information in this article relating to AllStar as it seems that it does not get much airtime.  Echolink has been around for a while, as has DMR and IRLP. Why another digital voice mode like AllStarLink and how does it function?  AllStar technology can feel overwhelming to some radio amateurs.  This is far from the truth.  If you are prepared to read and spend a little time on it you will be rewarded with the best audio quality coming from your station. 

 

What is AllStar?

AllStarLink is a network of Amateur Radio repeaters, remote base stations and hot spots accessible to each other via Voice over Internet Protocol. AllStarLink runs on a dedicated computer (including the Raspberry Pi) that you host at your home, radio site or computer center. It is based on the open source Asterisk PBX running our app_rpt application. App_rpt makes Asterisk a powerful system capable of controlling one or more radios. It provides linking of these radio "nodes" to other systems of similar construction anywhere in the world via VoIP.

AllStarLink's primary use is as a dedicated computer node wired to your repeater or radio. Connections from Echolink, other VoIP clients and telephone calls are supported.

AllStarLink has 42770 users and 45117 nodes.

What is a node?

A node, in simplest terms, is a computer that connects to the AllStarLink network. Nodes typically have an RF radio interface as well as an internet connection. Radios can range in size from a repeater radio to a low power radio integrated into a node. A node allows you to connect to other nodes in the AllStarLink network.

Nodes take the form of an inexpensive Raspberry Pi computer or a PC running the Linux operating system.

How do I use AllStarLink?

If you have a local FM repeater that is AllStarLink enabled, you may already be using it! However, before attempting to control a local FM repeater, check with the owner(s) first before doing so -- ham radio etiquette applies.

AllStarLink is typically used in these ways:

• Via a FM repeater that is AllStarLink enabled. Controlled through DTMF commands, via the internet, or an autopatch.
• Via a local micro-node that is purchased by a HAM operator to join the AllStarLink network
• Via PC/Mac software that allows you to connect directly to a node. The microphone / speaker are used for audio.
• Via a mobile app such as DVSwitch Mobile to connect directly to a node.
• Via an autopatch

 

Getting on AllStarLink

• If you wish to create your own node, follow the directions below to create an account. After your account is active, you will need a suitable PC or Raspberry Pi computer to install AllStar onto.
• If you wish to use a local FM repeater that is AllStar enabled, you do not need an AllStar account. Check out our Active Nodes List to find a repeater near you. If you type your city name in the search box, you will be given a list of active nodes. However, before controlling any node via RF & DTMF, be sure to talk to the operator(s) of that node and receive permission first.
  • For a list of possible commands, visit the AllStarLink Standard Commands page.
  • Some nodes may be local/non public nodes, so look for information that the node is in fact public.
• If you wish to purchase a pre-made or complete node, check out our Radio Connections page for a list of vendors.
  

Benefits of AllStarLink (HamVoip)

AllStarLink benefits amateur radio operators by creating a global network for radio communication over the internet (VoIP), enabling long-distance/intercontinental chats, linking analog and digital systems (DMR, YSF), improving emergency comms with flexible infrastructure, offering high-quality audio, and providing control over personal nodes for enhanced privacy and customization, all built on open-source software. It allows for connecting handhelds to powerful repeaters or even controlling systems remotely, supporting various amateur radio activities from nets to simplex contacts. 

Key Benefits

• Global Connectivity: Link with other hams worldwide using your radio, bypassing geographical limitations through the internet.
• Emergency Preparedness: Offers resilient, alternative communication infrastructure for disaster relief coordination.
• Hybrid Communication: Bridges analog RF (radio frequency) with digital VoIP, connecting different radio types (DMR, YSF, P25) and even traditional EchoLink.
• High-Quality Audio: Uses business-grade codecs for clear voice communication, even with age-related hearing changes. Being able to clearly hear what is being said is becoming more important as hearing changes with age. The audio quality is excellent.
  
• Flexibility & Control: Build your own node, giving you autonomy, privacy, and control over your connection, or use pre-built solutions.  You can also purchase a fully functional allstar node
  
• Open-Source & Customizable: Built on open-source Asterisk software, allowing for extensive customization, scripting, and integration.
• Enhanced Features: Supports autopatch, remote control, scheduled events, and integrates with smartphone apps (DVSwitch) for broader access.
• Controlling Repeaters:  It can control repeaters or operate as an individual node in an AllStarLink network like the ZS-Link Network in the Southern Cape. When part of a repeater system, people can connect over radio or over an internet connection. I find this more inclusive than the idea that if you aren’t using a radio (or you aren’t a CW operator, or you aren’t using a vacuum tube radio, or or or), you aren’t really a amateur radio operator.  Hogwash!! 
• Versatility:  You can make simplex contacts or participate in nets, nearby or across the planet. While AllStar works fine for conversations with hams close by, it shines in situations where geographic distance would otherwise hamper conversations. If you are near a repeater with AllStarLink, you can operate over RF. If no such repeater is near you, you can operate over an internet connection.
• AllStarLink neatly solves the following problems:  Can’t put up antennas.  Too much RF interference to enjoy using radios over RF.  Living in a facility that prohibits amateur radios that transmit and receive over RF. 

Drawbacks of AllStarLink (HamVoip)

To say that AllStarLink does not have any drawbacks would be a lie.  So here are the drawbacks.

AllStarLink (ASL) is a powerful, Linux-based VoIP (Voice over Internet Protocol) system for linking amateur radio repeaters and nodes. While highly versatile, it has several drawbacks, particularly regarding setup complexity, hardware reliability, and audio quality management

. 

 

Key drawbacks of AllStarLink include:

• Complex Setup and Technical Barrier: Setting up an AllStar node requires knowledge of Linux, networking, and radio hardware. It is not a "plug-and-play" system for beginners, requiring configuration of Asterisk, Node-Ventures, or similar software.
• Hardware and Interface Issues:
  • USB Radio Interface (URI) Problems: Some USB interfaces (like the DMK URIx) have been known to have issues with EEPROM, causing them to appear as if they have failed.
  • Audio Levels: Users often report that audio levels are inconsistent across different nodes.
  • Component Failures: Raspberry Pi-based nodes, especially when used in high-demand or remote, unheated environments (like mountaintop repeaters), can be prone to intermittent crashing and need remote reset capabilities.
• Networking and Connectivity Hurdles:
  • NAT Router Issues: AllStar registration can fail behind certain NAT routers that do not maintain proper source-port preservation (expected to be 4569).
  • Firewall Configuration: Connecting to other nodes requires specific firewall port forwarding, which can be difficult for some users to manage.
• Audio Quality and Codecs:
  • Limited Codec Improvements: The system relies on older technology, with some users noting that audio codecs have not seen major improvements in over 20 years, relying primarily on GSM.
  • Audio Breakups: Some Raspberry Pi implementations have reported audio gaps and inconsistencies.
• Support and Documentation:
  • Poor Documentation: Access to up-to-date, comprehensive documentation is considered a weak point.
  • Support Forums: While a community exists, troubleshooting often relies on user-driven forums rather than dedicated, professional support.
• Dependency on Internet Stability: As a VoIP system, the quality and reliability of the audio link are entirely dependent on the stability of the internet connection; high latency or packet loss will break the audio.

Despite these drawbacks, AllStarLink remains a very popular, flexible system if the user is willing to manage the technical, hands-on nature of the platform.  Do not believe people who tell you  that AllStar is to complicated.  Nothing comes for free in life and if you get stuck there is more than enough competent AllStar experts out there to assist you.  I have no Electronic or IT background.  What I know today I have learned by reading, asking, watching videos etc.  If you have the will to be successful and you use your spare time wisely you will be successful in setting up and running your own AllStarLink Node.

I am not going to explain how to get started with AllStarLink or how to operate a node.  Google is your friend.  The Internet has nowadays an abundance of information on how the get started with AllStarLink.  The following three links will provide you with an lots of information.

AllStarLink Website:   Click HERE

HamVoip Website:  Click HERE

Ham Radio Crusader:  Click HERE

 

 

Image:  Flowchart of the ZS-Link Network HUB (Click on image for larger view.)  

 

Summary :

 

The cheapest and easiest way to participate in the ZS Link AllStar Network is to use a VHF handie talkie or VHF mobile radio to talk over the Aasvoëlkop Repeater that is already connected to the AllStarLink network via the ZS-Link HUB in Mossel Bay.

Next up is using an Android smartphone or tablet that you already have to connect to the ZS Link AllStar Network. 

Ultimately you can build or buy a node and connect it via RF or the Internet to the ZS-Link AllStar Network. 

 

Finally:  

 

More information regarding the ZS Link Network and Projects are available on our Blog by clicking   HERE.  This Blog is a real treasure trove and contains 847 posts up to today.

Belangrike Kennisgewing: Verandering van die aanvangstyd - ZS Link Netwerk se Sonsak Span Net - Maandag tot Sondag / Important Notice: Change of starting time - ZS Link Network's "Sonsak" Team Net - Monday to Sunday

Geliewe kennis te neem dat die Sonsak Span Net se aanvangstyd verander het vanaf 16h30 na 16h45 SAST -  Maandag tot Sondag.  Die besluit is geneem om doelmatigheids redes.

Volle Besonderhede: Nuwe aanvangstyd 16:45 SAST - "Sonsak Span" Net - Daagliks om 16:45 SAST insluitend Saterdag en Sondag op die 145.625 Mhz 88.5 hz Aasvoelkop Herhaler. Radioamateurs kan konnekteer via ZS1SB-L Echolink, ZS1I-R Echolink, 49355 AllStar of TG65511 op DMR en die 145.550 Mhz 88.5 hz toon ZS1I Simplex HUB Link.

Sluit gerus aan by die Net en geniet die samekoms van radio amateurs op die lug!!

Please note that the "Sonsak" Team Net's starting time has changed from 16h30 to 16h45 SAST - Monday to Sunday. The decision has been made for efficiency reasons.

Full Details: New starting time 16:45 SAST - "Sonsak" Team Net - Daily at 16:45 SAST including Saturday and Sunday on the 145.625 Mhz 88.5 hz Aasvoelkop Repeater. Radio amateurs can connect via ZS1SB-L Echolink, ZS1I-R Echolink, 49355 AllStar or TG65511 on DMR and the 145.550 Mhz 88.5 hz tone ZS1I Simplex HUB Link.

Feel free to join the Net and enjoy the gathering of radio amateurs on the air!!

Why do ants nest in electrical- and electronic equipment?

During the "Sonsakspan Net" on the 30 December 2025 @ 16h30 the above question was asked by one of the participants as he experience an invasion in an electrical box.  AI provided the following information:

Ants nest in electrical boxes because they offer perfect shelter: warmth, darkness, and protection from predators and weather, especially in outdoor boxes where they get a dry spot during rain. Some ants, like invasive fire ants and crazy ants, are even attracted to the electromagnetic fields (EMF), micro-vibrations, and potential starch in old wiring, creating a feedback loop where dead ants release pheromones that attract more ants, leading to serious electrical issues and potential fire hazards.

Why Ants Are Attracted

• Warmth: Electrical components generate heat, providing a cozy nesting site, especially in winter.

• Shelter & Darkness: Boxes offer a secure, undisturbed, dark space, away from the elements and predators.

• Moisture: They can find moisture in soil or condensation within the box.

• Food (Sometimes): Some older insulation contains starch that ants might eat.

• Electromagnetic Fields (EMF): Certain species, such as Tawny Crazy Ants and Fire Ants, are attracted to the oscillating magnetic fields (60 Hz in North America) and electromagnetic signals emitted by live wires.

• Pheromone Feedback Loops: When an ant enters a switch and is electrocuted, it releases "alarm pheromones". These chemicals signal a threat, causing hundreds of other ants to swarm the source to "attack" it, eventually clogging the mechanism with dead bodies. 

Risks & Problems They Cause

• Short Circuits & Failures: Ants build nests with soil, which can bridge connections, causing shorts, tripped breakers, or power outages.

• Corrosion: Moisture from their nests, combined with soil, corrodes wires and components, leading to equipment failure.

• Pheromone Trails: When ants die from electrocution, they release alarm pheromones that attract even more ants, worsening the infestation.

• Fire Hazard: Overheating wires from nesting material or short circuits can create a significant fire risk.

What to Do

• Clean & Seal: Thoroughly clean out nests, use caulk to seal entry points around boxes, and remove food sources.

• Use Baits: Place ant baits near but not in the boxes to eliminate the colony at its source.

• Call a Pro: For serious infestations, especially with invasive species, contact a pest control professional.

Recipe to remove ants in a household: (NOT ELECTRICAL EQUIPMENT!!)

Using borax and sugar creates an effective, slow-acting ant bait because sugar attracts ants, while the borax (boric acid) kills them once ingested, allowing worker ants to carry it back to the colony to eliminate the queen and larvae. A common ratio is 3 parts sugar to 1 part borax, mixed into a paste with a little water or syrup, placed in shallow dishes (like bottle caps) near ant trails, but always keep it away from kids and pets. 

Images sourced from the Internet.  (Click on images for larger view.)

APRS Activity increasing in the Southern Cape, South Africa

Above Image:  OSCAR 44 (also called Navy-OSCAR 44, PCSat-1, Prototype Communications SATellite and NO-44) is an American amateur radio satellite for packet radio. It was built by Bob Bruninga at the U.S. Naval Academy.

What is APRS?  No APRS is not new in amateur radio.  APRS was developed in the late 1980s by Bob Bruninga, call sign WB4APR, a senior research engineer at the United States Naval Academy.

 

APRS, or Automatic Packet Reporting System, is an amateur radio-based system for real-time digital communication of information like GPS coordinates, weather data, and text messages. It transmits data packets over radio frequencies, allowing users to display real-time information, such as object locations on a map, and is widely used for emergency communications and asset tracking. 

How it works

• APRS uses packet radio technology to send digital information over specific frequencies.

• A GPS receiver is often combined with a radio modem to automatically transmit a station's location, a process known as tracking.

• Data packets can include callsign, GPS coordinates, altitude, weather telemetry, status messages, and short text messages.

• Other users can receive these packets and display the information, typically on a map, allowing for shared situational awareness.

• Information can also be relayed through the internet via APRS-IS (Internet System) gateways, enabling global access to local data.

What it's used for

• Emergency Communications: Quickly sharing tactical information, such as weather alerts or the location of emergency personnel, during a disaster.

• Tracking: Monitoring the real-time movement of vehicles, such as in a rally or search and rescue operation.

• Asset Tracking: Locating mobile stations or other assets on a map.

• Information Exchange: Sending short messages, announcements, or weather station data to other operators.

Above is just a short explanation in a nutshell what APRS entails.  Many radio amateurs think APRS is all about tracking vehicles and objects.   APRS is far more that watching objects on a map.

Want to know more about APRS and it's History.  Click HERE

APRS Activity increasing in the Southern Cape, South Africa

APRS is not new in the Southern Cape / Garden Route Area.  I will in a future article provide more information on the history of APRS in this area and what roll it played during "Exercise Double Barrel."

There is definitely an increase and renewed interest in APRS in the Southern Cape.

Herewith a list of all the ZS1 APRS stations as displayed by aprs.fi.  Click HERE

Stations active on 2 December 2025 at 15h00 SAST:

Click on images for larger view.

Further reading:

How to configure APRS Reporting in South Africa

How to configure a radio for APRS location and data reporting in South Africa

Opgedateerde Vloei Diagram: ZS1I ZS-Link Netwerk - Besoekende Radio Amateurs aan Mosselbaai, Hartenbos en Danabaai

Images: Click on image for larger view or download below

Ek is by verskeie geleethede gevra om meer inligting te verstrek rondom die ZS1I HUB Netwerk in Mosselbaai. Die vloei diagram is slegs gebasseer op nodes, herhalers en netwerke wat tans aan die ZS1I HUB gekoppel is.  Ek het 'n nuwe vloei diagram saamgestel wat die nodige inligting bevat  rondom die HUB en hoe radio amateurs kan inskakel by die HUB.  Weereens is dit baie moeilik om al die inligting op een velletjie papier beskikbaar te stel.  Ek beoog om later 'n volledige "handleiding" van die algehele ZS-Link Netwerk in die Suid Kaap en ander dele van Suid Afrika saam te stel soos wat die tyd my dit toelaat.  Ek vertrou dat die vloei diagram van hulp sal wees vir diegene wat dalk nie verstaan hoe die network funksioneer nie.  Vrae op die lug asook op "Die 625 - 6 Uur  Half 5 Span" WhatsApp groep rakende die ZS Link Netwerk is meer as welkom.

Aflaai / Download: Vloei Diagram / Flow Diagram

Updated Flow Diagram: ZS1I ZS-Link Network - Visiting Radio Amateurs to Mossel Bay, Hartenbos and Dana Bay

I have been asked on several occasions to provide more information about the ZS1I HUB Network in Mossel Bay. The flow diagram is only based on nodes, repeaters and networks that are currently connected to the ZS1I HUB. I have compiled a new flow diagram that contains the necessary information about the HUB and how radio amateurs can connect to the HUB.  Again, it is very difficult to make all the information available on one sheet of paper. I intend to later compile a complete "manual" of the complete ZS-Link Network in the Southern Cape and other parts of South Africa as time permits. I trust that the flow diagram will be of assistance to those who may not understand how the network functions. Questions on the air and "Die 625 - 6 Uur  Half 5 Span" WhatsApp Group about the ZS Link Network is more than welcome.

New AllStar HamVoip SD Card compiled and implemented on the ZS Link Network System

The new AllStar HamVoip SD Card has been compiled and implemented on the ZS Link Network System iro the 49355 HamVoip Node.  Now why would one implement a new SD Card if the one in use was still working.  Well it is quite simple.  As the ZS Link Network expand, certain changes need to be made to accommodate certain functions and setups.  I tried to alter certain settings using the old card but was not successful to change certain files for the new setup.

What changes did I implement on the new SD Card?

• Changed the following settings in the simple-tune-menu: 

• • Change RXONDELAY value to -100.  Rxondelay delays the valid COS signal and is used to stop cyclic keying or ping-pong which can sometime happen.  If you bring up simpleusb-tune-menu and select the "V" view mode.  You can see both the COS input and COS composite displays.  To understand how rxondelay works set it to some high value like 20 or 400ms.  When you transmit to your node you will see the COS input immediately go keyed and the 400ms delay of the composite.  Setting this value to high would cutoff the beginning of a transmission as it delays the actual COS beyond the real COS signal.  The default is 0 and this would be appropriate in most all cases except in the case of the Aasvoëlkop Repeater with a fairly long squelch tail.  In my case -100 did the trick. 
  • Change RXAUDIODELAY value to 5.  Rxaudiodelay is primarily used for squelch tail elimination. It delays the audio in a buffer so that a drop of COS can cutoff a portion of the audio before the COS drops thus eliminating the tail of the transmission where a squelch crash would take place. Since all radios are different this value is adjustable. Valid values are from 0-24 in 20ms increments. Typical values in most cases would range from 5-10 or 100-200 ms. If is obviously not mandatory to use this, some people actually like squelch tails. The default is 0. If you have a way to monitor your node through another node or maybe iaxrpt you can listen when you drop TX on the node you want to adjust and move this value up until the tail is gone. Unless the tail is unusually long you should be able to eliminate it.
  
  
• Repeater / Simplex Settings (rpt.conf): 
  
  
  Go to Repeater / Simplex Node Settings
  Look for duplex = 1
  Change the 1 to 0
  duplex 0
  
  
  
  This means half duplex with no telemetry tones or hang time. I entered this during the setup of the 49355 HamVoip node on the new SD Card. 

• Turn off link connect and disconnect announcements:    
  

         When running a link network we need to turn off those ridiculous connect and disconnect                     announcements which can last a long time and also interrupt the use of the link system.

 

         I edited the following to get rid of the annoying connect/disconnect telemetry messages.

         In rpt.conf look for:

         holdofftelem=1  (Disable courtesy tones) ( 0 = default, 1=Disable)

         telemdefault=0  (Do not make announcements)

         ; 0=voice telemetry off

         ; 1=voice telemetry on

         ; 2=only your telemetry actions

 

• Updated the 49355 Favorites.ini file. Discarded all the old and non-active nodes and added the new and active nodes.
• Tested the AllStar build in DDNS
• Added and setup a dynamic DNS for node 49355 running on a Raspberry PI using Arch Linux.
• Setup a Static IP Address for HamVoip Node 49355.
• Activate Connection Log for HamVoip Node 49355.
• Rewrite the Crontab -e file for HamVoip Node 49355. 

      The following Crontab entries were add:

1.  Auto Connect to the Pretoria Repeater (Monday to Saturday)
2.  Auto Connect to the Aasvoelkop Repeater (Sunday to Saturday)
3.  Auto Connect to the Still Bay Repeater (Sunday to Saturday)
4.  Auto Connect to the East Coast Reflector in the USA (Sunday to Saturday)
5.  Auto Connect to the SARL News Bulletin (Sunday Morning)
6.  Auto Play pre-recorded ZS-Link Network Announcements (Various times of the day)
   

The new SD Card has been in operation for the past week without any issues.  With the old card I did experience some issues which have been fixed by using the new card.  So far I am quite please with the performance and stability of the 49355 ZS Link Hub Network Node.  All the effort and time spend compiling the new card from scratch was a great idea and asset to the network.

Enjoy using the new 49355 HamVoip HUB Node  another valued addition to the SCP ZS Link Network, brought to you by the Southern Cape Link Network Group. 

Story Time will resume on the 1 September 2025, 06h00 SAST on the "Sonsopkoms Net

Storietyd sal hervat word op 1 September 2025, 06:00 SAST op die "Sonsopkoms Net".

Die Suid-Kaapse ZS-Link Netwerk bied verskeie dienste aan mede-radio amateurs wat daagliks by die netwerk inskakel. Die Sonsopkoms-netwerk sal komende Maandag, 1 September 2025 om 06h00 SAST hervat noudat die winter besig is om stadig maar seker plek te maak vir die Lente en later die Somer. Een so 'n diens sal vanaf Maandag tot Vrydag om 06:00 soggens op die "Sonsopkoms"-netwerk plaasvind. Ons het die voorreg om na Richard ZS5RMN se Wonderlike Wêreld van Stories - Die Storieverteller te luister. Waaroor gaan dit nou alles? Richard is 'n baie talentvolle persoon en skryf sy eie versameling gedigte of kortverhale vir gemeenskaps radio en nou ook vir die ZS Link Netwerk.

Richard ZS5RMN lees elke oggend 06h00 'n storie op die lug in die week tydens die "Sonsopkoms" Net. Richard was hard aan die werk die afgelope tyd om ‘n nuwe reeks episodes van “An African Story” te skryf.

Baie van Richard se stories en gedigte kan afgelaai word vanaf Spotify, IonoFM, Apple en ander Podcast-platforms. Soek net vir “An African Story” deur Richard Mark Nicholls.

Die ZS Link Netwerk is trots om ons eie Storieverteller in die groep te hê en wil graag vir Richard bedank dat hy ons meer gaan vertel van Crazymeer, Spot en al die ander Afrika-diere in “An African Story”

Baie dankie Richard vir jou tyd en moeite in hierdie verband. Dit word hoog op prys gestel deur baie wat vanaf Maandag tot Vrydag weer gaan inskakel om 06h00 op die Sonsopkoms Net.

Onthou Maandag, 1 September 2025 is dit weer Storietyd!!

Sluit aan by die "Dagbreek Span" Oggend Net: Daagliks om 06:00 SAST behalwe op Saterdag en Sondag op die 145.625 Mhz 88.5 hz toon Aasvoelkop Herhaler. Radioamateurs kan konnekteer via ZS1SB-L Echolink, ZS1I-R Echolink, 49355 AllStar of TG65511 op DMR en die 145.550 Mhz 88.5 hz toon ZS1I Simplex HUB Link.

*****************************************************************************

Story Time will resume on the 1 September 2025, 06h00 SAST on the "Sonsopkoms Net

The Southern Cape ZS-Link Network offers various services to fellow radio amateurs who log into the network daily. The “Sonsopkoms” Network will resume this coming Monday, 1 September 2025 at 06h00 SAST, now that winter is slowly but surely giving way to Spring and later Summer. One such service will take place from Monday to Friday at 06h00 on the "Sonsopkoms" network. We have the privilege of listening to Richard ZS5RMN's Wonderful World of Stories - The Storyteller. What is it all about? Richard is a very talented person and writes his own collection of poems or short stories for community radio and now also for the ZS Link Network.

Richard ZS5RMN reads a story on air every morning at 06h00 during the week on the "Sonsopkoms" Net. Richard has been hard at work lately writing a new series of episodes of “An African Story”.

Many of Richard’s stories and poems can be downloaded from Spotify, IonoFM, Apple and other Podcast platforms. Just search for “An African Story” by Richard Mark Nicholls.

The ZS Link Network is proud to have our own Storyteller in the group and would like to thank Richard for telling us more about Crazymeer, Spot and all the other African animals in “An African Story”

Thank you very much Richard for your time and effort in this regard. It is greatly appreciated by many who will tune in again from Monday to Friday at 06h00 on the “Sonsopkoms” Net.

Remember Monday, 1 September 2025 it is Story-time again!!

Join the "Dagbreek Span" Morning Net: Daily at 06h00 SAST except on Saturday and Sunday on the 145.625 Mhz 88.5 hz tone Aasvoelkop Repeater. Radio Amateurs can connect via ZS1SB-L Echolink, ZS1I-R Echolink, 49355 AllStar or TG65511 on DMR and the 145.550 Mhz 88.5 hz tone ZS1I Simplex HUB Link.

Upgrading of the Still Bay Repeater (13 April 2025) in the Southern Cape (Part 2)

Image:  Yaesu DR-2X Repeater and Cavity Filters.   Click on images for larger view.

Opgradering van die Stilbaai Herhaler (1 Februarie 2025) in die Suid Kaap.  (Deel 1)  =  LINK

The first upgrade to the Still Bay Repeater as undertaken on the 1 February 2025 and you can read more about it by clicking on the LINK above.  More information on the Yaesu DR-2X 50W Digital Repeater (C4FM IP Interconnect Dual Band Receiver System Multi-function Repeater) is available HERE.   (Note: Afrikaans articles can be translated by using the Translate Tab on the Blog to choose a language of your choice.)

In this posting (Part 2) I will be looking at further upgrades to the Still Bay Repeater that was undertaken on the 13 April 2025.  Before going ahead I would like to clear a possible misconception relating to the Yaesu DR-2X Repeater.  You might read in previous articles that the Yaesu repeater was installed at the Aasvoëlkop Repeater site.  That was indeed the case but due to commercial interference the Yaesu DR-2X Repeater was relocated to the Still Bay Repeater site and the Yaesu Vertex VXR9000 Repeater is now installed at the Aasvoëlkop Repeater site.

What did the 13 April 2025 upgrades entail:

1.  Setup of the AMS (Automatic Mode Selection) platform relating to the UHF Repeater frequencies:  This YAESU DR-2X repeater supports C4FM digital / regular FM dual mode and dual receive function relay platform, which includes VHF and UHF amateur radio band. Through the AMS function, the DR-2X mixes communication using conventional FM mode communication and C4FM (YSF) digital mode.  The UHF frequency function was enabled as well as C4FM (YSF) Digital Mode.Compared with other digital models, the C4FM modulation mode has better bit error rate (BER) characteristics to ensure good speech quality in communication. The C4FM digital high definition voice technology using 12.5kHz bandwidth enables the high quality voice communication to be transmitted perfectly.

Take Note - The following frequencies is now in use for this repeater:

VHF = 145.750 Mhz RX and 145.150 Mhz TX  88.5 hz CTCSS  Tone

UHF = 438.750 Mhz RX and 431.150 Mhz TX  88.5 hz CTCSS Tone

2.  Re-Tuning of the Duplex Filters.  A big thank you to Dolf ZS1DRP and Eben ZS1EP for spending time while on holiday to re-tune the Still Bay duplexers.  The re-tuning of  the duplexers made a very big difference to the performance of the Still Bay Repeater.  (Watch the two videos to hear how Nick ZS1ZAN access the repeater all the way from the Anysberg in the Karoo.)

3.  It was also recently noticed that on cloudy days the Still Bay Repeater output would fall considerably.  Johann ZS1AAC indicated that the batteries need replacement. He replaced the batteries on site and the repeater now runs full output during all weather conditions.. 

4.  As with all repeater sites we as radio amateurs should keep sites clean and neat at all times.  Johann ZS1AAC undertook this task to ensure that the site was clean and safe. While cleaning the site a Cape Cobra snake came to see what was happening.  Needless to say that both Johann and the snake had a good eye-ball where after both went their separate ways, thankfully without any incident.

5.  Henry ZS1SB donated a EVE 280Ah LiFePO4 Battery to be used at a future repeater site. This battery is engineered for high performance and safety, making it ideal for various applications, including renewable energy storage and electric vehicles. With a nominal voltage of 12.8V and a cycle life of up to 8000 cycles @ 80% DOD, this battery ensures long-lasting efficiency.  A big thank you to Henry ZS1SB for donating the battery to the Southern Cape Link Network Group.  Highly appreciated!!

Finally:  After the above upgrade the Still Bay repeater’s performance increased drastically.  So much so that Nick ZS1ZAN from Anysberg can now clearly be heard via this repeater.  Other reports also confirm a noticeable improvement in TX and RX.  Join the weekly gathering on this repeater at 18h30. 

To all the radio amateurs and non radio amateurs (Unfortunately I do not have all the names) who assisted in the second upgrade of this repeater and also for all the hard work that they put in,  a big thank you!  You did not only do it for yourself and other radio amateurs but for the continued existence of Amateur Radio in South Africa.  The way and spirit in how this was done is clearly an example to all of us.  Then there are many radio amateurs that are not able to assist in this project  however they contributed by means of donating equipment and money. We all know that the installation and upkeep of repeaters are costing money.  Others again contributed by way of moral support, reception reports, ham spirit etc.  A big thank to everyone who contributed in any way possible to the future of Amateur Radio in the Southern Cape.

The following radio amateurs were actively involved in this upgrade of the Still Bay Repeater:

1.  Henry ZS1SB

2.  Eben ZS1EP

3.  Dolf ZS1DRP

4.  Rassie ZS1RP

5.  Johann ZS1AAC

6.  Danie ZS1DL

7.  Nick ZS1ZAN

Images:  Click on images for larger view.

Reception report videos by Danie ZS1DL (Dana Bay):