Friday, June 26, 2020

Covid19 has changed the way we do certain things in Amateur Radio

Image: Bracknell Amateur Radio Club

As the title indicates, certain activities changed in Amateur Radio due to Covid19.   Whether some changes will be permanent in future need to be seen.  It is currently to early to come to any conclusions or final decisions.   However we must adapt to circumstances or be willing to sacrifice certain pleasures in Amateur Radio due to the Covid19 virus.

One such activity is monthly public  get togethers or club meetings.  In our area we have a club as well as a group of radio amateurs that get together.  The club has  quarterly meetings while the  Reboot Group get together on a monthly basis.  Since the pandemic outbreak started all meetings were stopped/postponed.  As the pandemic progress it is clear that it will take some time before we can hopefully safely get together again.

I suggested we use ZOOM at this time as to stay virtually in touch with each other even drinking a cup of coffee while in a ZOOM meeting.  What we have done before can now be done safely with ZOOM without the risk of getting infected.

Setting up a "studio" to broadcast meetings etc. is now underway and we will do the first test streaming on the 1 July 2020 at 19h30.  To make sure that the video quality will be acceptable I needed to install/gather equipment.  The three main "ingredients" for a good video broadcast is:  1.  Good Audio 2. Good Lighting and 3. Good Video.  Many of the equipment needed are currently not available due to the fact that the public bought most stock to stream various services etc.

I needed to think out of the box to get a simple yet acceptable small "studio" up and running with equipment on hand or easily available.  For audio I decided to invest in a USB microphone.  I do have an "elaborate" mixer, sound interface and dynamic microphones on hand but decided to buy the FiFine K669B microphone for ease of use and the availability of space.  This microphone is also used for WhatsApp,  Skype, Zoom, Echolink and AllStar and has shown to be a relative good cheap performer.


Setting up the microphone is a breeze and the final results are amazing for such an inexpensive microphone.

Good lighting was next on the list.  Now my space for a "studio" is very small and I needed to make sure that I do not clutter my work area even further with lights, mics, stands, cameras etc.  For lighting I chose a cheap Chinese LED light which already has a diffuser installed.   This light was manufactured to install into a ceiling and not on a tripod or overhead stand.  I modified the light and it can now be used in many formats.  I made a bracket that screws onto the back of the light.  This allows for easy fitting to any object or stand.  It is not the brightest of lights but will be used as a fill light.  I intend to use a three point light setup to start with.



Now this project is far from complete.  This topic will be updated as I progress with the project.  I am currently looking at building an overhead or wall mount stand which will hopefully also save on the amount of space.  To mount lights, cameras, and other accessories I need a sturdy overhead rig.  I have not yet decided on how I will build mine but have a few ideas up my sleeve.

I am busy constructing a swing arm that will be used to mount either a microphone or a camera.   It is sturdy enough for a microphone or a camera.  I still need to make the mount to attach to either a wall or overhead rig.  The images underneath depict the swing arm.




My green screen that I will be using on ZOOM and OBS under construction:




Busy constructing my H-Frame Light Stands:



Updates to follow as I continue with the project.  Please check back from time to time if you interested in Virtual Amateur Radio Meetings.

Sunday, June 14, 2020

Reboot Amateur Radio Coffee Drink Events - Southern Cape Area


The Covid19 Epidemic has changed the world forever. A new way of living will bring forth many challenges and changes, some might not like. Changes can be good or bad.   For now no one really knows what the future will hold for many of us.  Maybe a good thing.  But life must go on and we can change our lifestyle to suite our needs.

Covid19 brought the monthly Reboot Amateur Radio Coffee Drink to an abrupt end.  But this does not mean we have to sit and do nothing or wait until the demise of the virus.  It is still going to be with us for some time.  Good news!!  The Reboot Coffee Drink Events will continue by way of virtual meetings by using ZOOM for the time being.  Those who fear that ZOOM's security is not up to standard.  Rest assure nothing on the Internet is safe from hackers.  However ZOOM are working in making the program more secure which of cause is a ongoing task for many software that we use on our computer.   I am also looking to incorporate other streaming options so as to allow those who would like to use say for instance Google Meet to be able to join via this medium.

The latest from ZOOM:

"Important Notice:  To enhance the security on your account, starting April 5th, meeting passwords and Waiting Rooms will be turned on by default to protect your privacy. As the meeting host, there are some steps you’ll need to take to familiarize yourself with these changes and ensure that your attendees can join your upcoming meetings seamlessly. Please read this article for step-by-step instructions."

I would like to ask members of the Reboot Amateur Radio Group in the mean time to install ZOOM and set it up to connect to the Reboot Amateur Radio  Group/Coffee Drink.  I am currently busy setting up two cameras, decor and lighting to facilitate meetings.  I still do not have a date for the first get together but the first event will only be a general test event and assisting those who have problems to setup ZOOM.  ZOOM can be used on a variety of computers, cellphones and tablets.  You do not need a computer.  A cellphone will also work.

If you do not know how to setup ZOOM then Google is your friend.  YouTube also has many videos to assist you in this regard.  I am the last person to ask as I only joined ZOOM about two weeks ago.  So this will also be a learning curve for me.

I personally think we can make this virtual meetings a great success like the real live events.  Where there is a will there is a way.  Get stuck in and get ZOOM setup and ready.  I will post the first ZOOM Meeting date and time on the Reboot Amateur Radio WhatsApp Group. 

Looking forward to see all of you joining the very popular amateur radio coffee drink events in the Southern Cape.  Lets show Covid19 that we can still get together and enjoy amateur radio coffee drink events as before.

Saturday, June 13, 2020

Important Notification: Severe Weather + Disasters + Emergency Communications - Reboot Amateur Radio Group





Important Notification to radio amateurs:  The Mossel Bay AREDN Mesh Network will be switched on when necessary and will be available should power and normal communication failures occur as a result of predicted severe weather or any disaster which might occur in the Southern Cape. The network will be usable in the Southern Cape Area and will be linked to the Internet, Twitter and AllStar and Echolink Radio Network.  In the event of a power / Internet failure the Mossel Bay Mesh- and Reboot AllStar Network will still be running and available for emergencies. UHF Freq to monitor: 433.400 Mhz FM.

The AllStar and Echolink Network will display the following notification:  Severe WX, Mossel Bay or Disaster, Mossel Bay that relates to the emergency.  I asked that radio amateurs listen and do not call or TX on ZS1I-L unless you have an emergency or traffic.  However radio amateurs are more then welcome to listen on ZS1I-L to activity.

When Reboot AR, Mossel Bay is displayed all radio amateurs are most welcome to use the networks and systems for normal amateur radio communications.

Please note that the Mossel Bay AREDN Mesh Network and Reboot AllStar/Echolink Network will be available to emergency communicators should they wish to use the system.  The Mossel Bay AREDN Mesh Network and Reboot AllStar/Echolink Network are not affiliated or involved in any emergency communication organization.   It is now the time for the younger amateur radio generation to get involved in emergency communications and render a service to their local communities if they so wish.

For all future emergency communications the local amateur radio club (ZS1SKR) or  HAMNET Western Cape can be contacted.  Here is the necessary contact details:

ZS1SKR - abe.zs1zsATgmailDOTcom  or  +27 827681754




Commemoration and Amateur Radio Involvement: Knysna Fires 7 June 2017


On the 7th of June, three years ago fires erupted and impacted the people of the Elandskraal, Belvidere, Brenton-on-Sea and Brenton-on-Lake, Knysna, Plettenberg Bay and Mossel Bay in ways they could never have imagined. 

Known as the Knysna Fires local radio amateurs also played an important role in providing important information and emergency communications.  For those who are interested here is a after action report that portrayed the involvement of local radio amateurs during these fires:  Report.  Today Vulcan Wildfire post an introduction film as to why they went to Knysna during the fires of 2017 and why they produced a documentary about the fires.  As of today they will begin showing the Knysna Fires documentary in edited Chapters. One chapter each day for six days.   Click HERE  to view all the chapters.

They do this in the hope that you will take the short time it will take to watch each Chapter and take the lessons, shared by those who lived through the fires, to heart.

This terrible event happened three years ago. 

Eight people lost their lives.

Here is three short videos that I compiled of the fire that raged in Heiderand on the 6 June 2017 a day before the Knysna fires. This run away fire damaged several homes.  Thankfully no lives were lost.







 

One of the radio amateurs on the Reboot Amateur Radio WhatsApp Group lost his house and all his possessions.  This is what was left of the house of  David ZS1OZ in Knysna.


Despite the loss, David writes: "Yes .It was quite traumatic. It meant that I had to build new gadgets. The thing I did discover is that everyone was helping each other and there is more friendship than animosity in this world."


David ZS1OZ: "This book was produced about the fire. I lost most of my equipment; rigs, spectrum analyser etc."

Thursday, May 28, 2020

DK7ZB Duoband Yagi for 2m/70cm by Kevern ZS1ABU


Kevern ZS1ABU writes:  I will post a few pictures of a Yagi we build a few years ago. It was build mainly to use for the Pears and SARL VHF/UHF Contests. We received many 1st and 2nd places using this antenna. Its cheap to build and all the hardware can be bought from Builders Warehouse, except the little standoffs which was made by Dieter ZS1DWH on his 3D printer. This was made from plans and examples on the well known website : https://www.qsl.net/dk7zb/Duoband/4+5_2m-70cm.htm





DK7ZB writes:  The 4-El.-Ultralight-Yagi for 2m can be used on 70cm with an SWR of 1,5 without any changes. The pattern and the currents of the Yagi are shown down. The Yagi has three forward lobes (according to the three current maxima in the 3/2-lambda-radiator) with 5,39dBd - 4,35dBd -5,39dBd gain. We can use this Yagi without any changes on 2m and 70cm.


For more information and diagrams, please visit the well known website of DK7ZB.  Here is the link:  https://www.qsl.net/dk7zb/start1.htm
and his amateur radio website at:  https://www.qsl.net/dk7zb/

Monday, May 25, 2020

Crystal Radio Set - LM RADIO X3 STATIONS AM by Johan ZS6IW Denotter



Click the link HERE to watch the video of the Crystal Radio in operation.


Danie ZS1DBJ George:  Môre Johan. Hoe ver is jy van die AM sender?

Abe ZS1ZS Mosselbaai: More Julle, Ons het 'n spoel gedraai om toilet rolle

Abe ZS1ZS Mosselbaai: en minora skeer lemmetjies gebruik vir verstellings kapasitors en 'n ou kristal oorfoon gebruik om te luister. Was nogal lekker. Johan pragtig jou spoel en luispreker / versterker

Johan ZS6IW Denotter  Hi. Seker so 40 km.
Die ander twee is kerkstasies wat nog altyd op MW is.


162 Mhz Slim Jim Project by Christie ZS4CGR Luckhoff









My "bender" vir 9.5mm Al.



HF Magnetiese Lus Antenna deur Danie ZS1DBJ




Danie ZS1DBJ George: Ek het weer bietjie gespeel met my magnetiese lus antenna en ingestel op 18.1Mhz. Coax gebruik vir die kapasitor. Elke cm is ongeveer 1pF.

Hentie ZS1LH Mosselbaai vra:  Danie sal die lus kan resoneer op 3,67 en/of 7,100?
Ek dink aan iets vir Danabaai as ek daar tussen die klomp ou mense gaan woon.

Nick ZS1N Boggomsbaai vra:  Danie wat is die omtrek van die lus?




Danie ZS1DBJ: Nick hier is mates. Verkoeling tipe koperpyp.

Abe ZS1ZS Mosselbaai: Danie is ons boffen met Magnetiese Lus Antennas. 80m mag dalk 'n opsie wees Hentie, darem nie te groot nie.

Abe ZS1ZS Mosselbaai: Wag so 'n jaar gelede by Henry ZS1AAZ en hy het 'n monster gemaak wat 'n vacuum tube gerbruik. Hy het ook 'n MFJ wat hy in sy agterplaas opgesit het. Ook 'n probleem met kompleks wat nie van antennas hou nie.

Danie ZS1ZS George: Nie boffin nie. Maar wel proeffin. Net proefnemings. Vir 80 meter moet die lus baie groter wees.




Magnetiese lus antenna deur Danie ZS1DBJ. Die koperlus het Å„ diameter van so 650mm en is gemaak van 16mm diameter koperpyp. Die koperpyp is afkomstig van Å„ verkoelings besigheid. Dit is sagte koper en maklik buigbaar. Die plastiese houers is afkomstig van gordyn reelings.  Die kapasitor vir die lus bestaan uit RG213 coax. Die kapasitansie vir die coax kapasitor was bepaal deur Å„ verstelbare kapasitor op die lus te koppel en met analiseerder die waarde te bepaal vir resonansie teen 18.104Mhx. Å„ Lengte RG213 coax is toe aan my kapasitansie meter gekoppel en stukkie vir stukkie korter gemaak totdat coax kapasitor en toets kapasitor se kapasitansie lesings eners was. Die gesnyde coax is toe aan lus gekoppel en met behulp van antenna analiseerder verder "getrim" vir resonansie op 18.104Mhz. Die volgende stap is om 2 klein stukkies PC bord aan onderkant van coax aan te bring vir "fine tune" aangesien die antenna Å„ baie hoë Q waarde het en is baie gevoelig op verskillende posisies. Ek sal moet kyk na motor beheer vir die "fine tune" kapasitor. Lus se koppeling met radio is via die "gamma matching rod". Die verstelling vir 50 Ohm word gedoen deur Å„ kortsluit brug op die lus en "matching rod" te skuif.   Å„ SWR waarde van 1.3 en Ohmwaarde van 50 kon bereik word. Die Icom 7300 se SWR toets fasiliteit het ook Å„ goeie SWR aangedui. Toetse is tot 20 Watt uitset beperk aangesien ek nie seker is van RG213 se isolasie spanning tussen geleier en afskerming nie. Op ontvangs is die antenna redelik vry van geraas.

Thursday, May 21, 2020

Building the Reboot AllStar Link Network (ZS1I-L) in Mossel Bay

Image (Top):  Reboot AllStar Node

So, what is the Reboot AllStarLink Network all about?

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 Rasperry 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 suported. We also have a Java Applet which can be used on older computers to access AllStarLink nodes.

For more information on AllStar visit the following two links:


We are often asked why Allstar with all of the new RF digital repeaters and their VOIP connection schemes out there. The best answer is open source, quality audio, and freedom to do what you want. Dstar, Fusion, DMR, etc are all at least partially if not completely proprietary systems. In most cases the VOIP connection system that makes them somewhat like Allstar is proprietary. Code plugs, Rooms, etc. all make for a confusing and hard to maintain system. It also makes a system which is managed much like IRLP. The individual users has little control other than to connect somewhere. Then there is the lousy audio that goes along with the current Amateur Radio digital RF schemes.

Allstar connects RF systems with full duplex quality audio. It also gives the user a choice in how and where they connect. Private or public group or individual connections can be setup quite easily. If you are in a restricted living environment like a retirement home or HOA that does not allow antennas Allstar gives you the radio feel without an obtrusive antenna or big expense. You could setup a simplex node in your apartment or dwelling and have local coverage with in a few blocks to several miles between your handheld and you own personal node. Couple that with the ability to setup connections to all your buddies that also have nodes and you have your own talk group with everyone using real radios to access. You also have the ability to access via computer, phone, Echolink, and many other methods.

The advent of the inexpensive small board computers and very easy scripted setup make getting on Allstar easier than ever. A savvy user who has the ability to make some modifications and build some simple circuity could get on Allstar for well under R1650. A totally plug and play system minus the node radio would be no more than R850.

For repeater operators Allstar is a complete repeater controller that probably has more flexibility and capability than any repeater controller on the market. It is certainly cheaper. Because it runs in Linux and is open source the user has full flexibility to use scripts, timers, multiple ports, etc. to do just about anything they would want.

So if you like to call your own shots come join the friendly world of Allstar. You will be surprised how easy it is to get started and a world of adventure awaits you.

The Reboot Allstar build started way back in June 2019. 

AllStarLink Node Features:
  • Full Feature Repeater Controller
  • VoIP Full Duplex Linking with great audio
  • Frequency Agile Remote Base Station
  • Simplex (half-duplex) Station
  • Echolink
  • APRS
  • Autopatch
  • Based on Asterisk - the Open Source PBX
  • Real-time status reporting
It will be impossible to describe the complete build here but there is more than  enough information contained in the above links to construct your own AllStarLink System.  I will however illustrate the build with photos and notes of the build.

The Reboot Allstar Link  Network hardware used entails the following:
Information on the Reboot AllStar Link Network:

Call Sign:  ZS1I-L
Frequencies:  [1]  433.400 Mhz [2] 145.525 Mhz
AllStar Node Number:  49355
Echolink Node Number: 108551
Description:  AllStar Simplex Radio Node

How to use the Reboot AllStar Link Network.  Node#  49355:

It is quite simple.  If you use Echolink just connect to ZS1I-L and your audio will automatically be relayed to the Reboot AllStar Link. Use Echolink as you would for any other Echolink station.  If you use AllStar just connect to Node Number *349355.  Disconnect:  In Echolink use the disconnect button.  In AllStar use *149355.

Current DTMF Function Services for Reboot AllStar Link Network using Echolink, HT Radio, Zoiper, iaxrpt or IAX DV Switch. (Please note this is currently only basic services/features)

DTMF Function List:

*1  = Link Disconnect
*2  = Link Connect (Monitor Only, no TX)
*3  = Link Disconnect
*70  = Link Status
*75  = Full system status (all nodes)
*80  = System Info
*81  = Time and Weather Information for Mossel Bay

If you mobile/fixed in the area of Mossel Bay you can use a VHF/UHF Radio to connect to the Reboot AllStar Link Network.  Use the above DTMF function to firstly connect to *349355 and then to any other Echolink or AllStar node of you choice in the World.  UHF Frequency:  433.400 Mhz  / VHF Frequency 145.525 Mhz.

For those using APRS, the Reboot AllStar Link Network is also reflected on APRS-fi, call sign ZS1I-1  Information on the node numbers and radio frequencies are displayed.


Further updates related to functions/services are planned for the future.  Please feel free to use the Reboot AllStar Link Network at any time.  Just announce your call sign and intentions and enjoy the network.

Here is a few build images of the ZS1I-L NODE:



Image (Top):  Modifying the Baofeng 888


Image (Top):  Modifying the Baofeng 888


Image (Top):  Testing the StarTech USB Soundcard


Image (Top):  Completed StarTech Sound Card FOB


Image (Top):  Testing the StarTech Sound Card FOB


Image (Top):  Check the cabinet outlay.


Image (Top):  Check the cabinet outlay.


Image (Top):  Preparing the cabinet.


Image (Top):  Preparing the cabinet.


Image (Top):  Preparing the cabinet.


Image (Top):  Installing the modules.


Image (Top):  Installing the modules.


Image (Top):  Modules installed.




Image (Top):  Completed Reboot AllStar Project


Top Image Reboot AllStar Node Link in use. Johan ZS6IW connected to the node.