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Saturday, January 7, 2023
Lippeklap Net Onderwerp: 8 Januarie 2023 15h30 (Echolink ZS1I-L, AllStar 49355 of 145.550Mhz RF 88.5 hz tone)
More (8 January 2023) is dit weer Lippeklap Net tyd maar eers om 15h30 want die Bo Karoo Bulletin word weer om 15h00 uitgesaai. Julle het gevra vir 'n tegniese onderwerp. So more is dit 'n tegniese bespreking. Die hoof onderwerpe gaan wees: 1. End Fed Dipole Antenna 2. Getting started with Raspberry PI. Dit beteken nie dat jy nie vrae kan vra oor tegniese aspekte nie. Kom sluit gerus by ons aan. Connect to ZS1I-L via Echolink or 49355 AllStar Node or any of the other nodes connected to the GRHub Network. People living in the Southern Cape can use 145.550 Mhz RF with 88.5 hz tone Hope to hear you on the Lippeklap Net tomorrow afternoon at 15h30.
Tuesday, January 3, 2023
Services Rendered by the GRHub Network and other Roll Players in Amateur Radio
I would like to draw the attention of new radio amateurs or first time visitors to the GRHub Network that the GRHub Network and many other roll players to many to mention here render various services to the amateur radio community at large. This will not be possible without the support om many individuals, clubs, Leagues, News Services etc. Many thanks to all those that makes the renders and makes this services available free of charge.
Please note that some of these services are being automatically announced on the GRHub Network from time to time but if you do not have the time to listen, here is a complete list of the services.
You are invited to join in on the fun. Connect to ZS1I-L via Echolink or 49355 AllStar Node or any of the other nodes connected to the GRHub Network.
List of Services:
Last Updated: 3 January 2023 07h13
As administrator of the GRHub Network I strive to link to active links where interesting and educational content are discussed. If you know of links that I can add to the favorite.ini tab, please provide me with the necessary information.
Sunday - Local Content:
1. Starting 07h00 SAST - KZN HAMNET Bulletin Sunday at 07h00 SAST on KZN Repeaters. ZS1I AllStar and Echolink nodes are connected via the Pietermaritzburg Repeater Network thanks to Koos ZS5KDK.
2. Starting 08h00 SAST - SARL on the Air Bulletins: Transmissions: Sunday at 08:15 (Afrikaans) and 08:30 (English) SAST on repeaters around South Africa. ZS1I Allstar and Echolink nodes will be connected either to the Panbult Repeater ZS6WDL-R or the Pretoria Repeater ZS0JPL-R via Echolink.
3. Starting time 8h45 SAST - Pretoria Amateur Radio Club Bulletin Sunday at 08:45 SAST on repeaters around South Africa. ZS1I Allstar and Echolink nodes will be connected to the Pretoria Repeater ZS0JPL-R via Echolink.
4. Starting 10h00 SAST - Amateur Radio Today: Program about Amateur Radio and technology hosted by Hans van de Groenendaal, ZS6AKV. Transmission on Sundays at 10:00 SAST (08:00 UTC) ZS1I Allstar and Echolink nodes will be connected either to the Panbult Repeater ZS6WDL-R or the Pretoria Repeater ZS0JPL-R via Echolink.
5. Starting 11h00 SAST - Eden Radio Club Bulletin Sunday at 11h00 SAST. The GRHUB Network is used by Thys ZS1TBPto relay the weekly amateur radio club bulletin. Radio Amateurs can connect via ZS1I-L Echolink or 49355 AllStar.
6. Starting 15h00 SAST - Bo Karoo Amateur Radio Club Bulletin: Transmission: Sundays at 3pm (15:00) SAST by Thys ZS1TBP via Echolink. ZS1I Allstar and Echolink nodes will be connected to ZS1TBP.
7. Starting time 15h30 SAST or 10 Minutes after the Bo Karoo Bulletin - "Lippeklap" Net. The "Lippeklap" Net will be active on the GRHub Network.
Connect to ZS1I-L via Echolink or 49355 AllStar Node or any of the other nodes connected to the GRHub Network.
Monday - Local Content
1. Starting time 05h00 SAST - East Coast Reflector : Transmission: 05h00 - 07h00 49355 Allstar Node and ZS1I-L Echolink nodes will be connected to the largest radio and VOIP network in the USA
2. Starting time 07h45 SAST - Pretoria ("Legends") Morning Net: Transmission: Daily at 07:45 - 09:00 except on Sunday on the Pretoria repeater South Africa. ZS1I Allstar and Echolink nodes will be connected to the Pretoria Repeater ZS0JPL-R via Echolink .
3. Starting time 19h45 SAST - Repeat Broadcast of the Pretoria Amateur Radio weekly bulletin. The GRHub Network will be connected to the Pretoria Repeater to relay this bulletin every Monday evening.
Tuesday - Local Content:
1. Starting time 05h00 SAST - East Coast Reflector : Transmission: 05h00 - 07h00 49355 Allstar Node and ZS1I-L Echolink nodes will be connected to the largest radio and VOIP network in the USA
2. Starting time 07h45 SAST - Pretoria ("Legends") Morning Net: Transmission: Daily at 07:45 - 09:00 except on Sunday on the Pretoria repeater South Africa. ZS1I Allstar and Echolink nodes will be connected to the Pretoria Repeater ZS0JPL-R via Echolink .
3. ARRL Bulletin Broadcast: 19h30 SAST - ARRL Audio News - ARRL Audio News is a summary of the week’s top news stories in the world
of Amateur Radio, along with interviews and other features. Enjoy ARRL
Audio News anywhere: on your smart phone or tablet, your local repeater,
or stream it on the go! (NOTE: There will be no bulletin broadcast on USA public holidays)
Wednesday - Local Content:
1. Starting time 05h00 SAST - East Coast Reflector : Transmission: 05h00 - 07h00 49355 Allstar Node and ZS1I-L Echolink nodes will be connected to the largest radio and VOIP network in the USA
2. Starting time 07h45 SAST - Pretoria ("Legends") Morning Net: Transmission: Daily at 07h45 - 09h00 except on Sunday on the Pretoria repeater South Africa. ZS1I Allstar and Echolink nodes will be connected to the Pretoria Repeater ZS0JPL-R via Echolink .
3. Starting time 19h30 SAST - Amateur Radio Newsline Broadcast: 19h30 SAST - Amateur Radio Audio News - AR Audio News is a summary of the week’s top news stories in the world
of Amateur Radio, along with interviews and other features. Enjoy AR
Audio News anywhere: on your smart phone or tablet, your local repeater,
or stream it on the go!
Thursday - Local Content:
1. Starting time 05h00 SAST - East Coast Reflector : Transmission: 05h00 - 07h00 49355 Allstar Node and ZS1I-L Echolink nodes will be connected to the largest radio and VOIP network in the USA
2. Starting time 07h45 SAST - Pretoria ("Legends") Morning Net: Transmission: Daily at 07:45 - 09:00 except on Sunday on the Pretoria repeater South Africa. ZS1I Allstar and Echolink nodes will be connected to the Pretoria Repeater ZS0JPL-R via Echolink .
3. Starting time 19h00 SAST - Eden Radio Club Chat Net: 19h00 SAST - The Eden Radio Club Net will be active on the GRHub Network. Connect to ZS1ERZ-L or ZS1I-L via Echolink or 49355 AllStar Node.
Friday - Local Content:
1. Starting time 05h00 SAST - East Coast Reflector : Transmission: 05h00 - 07h00 49355 Allstar Node and ZS1I-L Echolink nodes will be connected to the largest radio and VOIP network in the USA.
2. Starting time 07h45 SAST - Pretoria ("Legends") Morning Net: Transmission: Daily at 07:45 - 09:00 except on Sunday on the Pretoria repeater South Africa. ZS1I Allstar and Echolink nodes will be connected to the Pretoria Repeater ZS0JPL-R via Echolink .
Saturday - Local Content:
1. Starting time 07h45 SAST - Pretoria ("Legends") Morning Net: Transmission: Daily at 07:45 - 09:00 except on Sunday on the Pretoria repeater South Africa. ZS1I Allstar and Echolink nodes will be connected to the Pretoria Repeater ZS0JPL-R via Echolink .
Monday to Saturday - World Wide Content:
Important
Note: The GRHub Network will be linked to any of the networks/links
underneath at different times of the day, depending on activity.
Advice: Please listen/monitor the GRHub Network before
calling/transmitting on the Network.
1. W5MGM Addison, TX USA AllStar HUB: Transmissions in several time-slots. ZS1I Allstar and Echolink nodes will be connected to this Hub.
2. WA3DSP Philadelphia USA AllStar HUB: Transmissions in several time-slots. ZS1I Allstar and Echolink nodes will be connected to this Hub.
3. K6JSI WIN System HUB L.A and East Coast IRLP - AllStar Reflector : Transmissions in several time-slots. ZS1I Allstar and Echolink nodes will be connected to one of the Hubs until 21h00 depending on local activity.
4. UK Hub Net: M0HOY-L Echolink or AllStar: HUBNet has rapidly become the largest multimode AllStar communications platform based in the UK. Transmissions in several time-slots. ZS1I Allstar and Echolink nodes will be connected to this Hub.
5. VK6RX Allstar Hub (Western Australia): Transmissions in several time-slots. ZS1I Allstar and Echolink nodes will be connected to this Hub.
6. ZLHUB DRGNZ HUB Network New Zealand: Transmissions in several time-slots. ZS1I Allstar and Echolink nodes will be connected to this Hub.
7. WH6AV Hawaii Mainland Overseas Asterisk Network: This site is about WH6AV and associated AllStar nodes. This Bridge runs on the lastest HAMVOIP Distribution of AllStar Link. Transmissions in several timeslots. ZS1I Allstar and Echolink nodes will be connected to this Bridge.
8. ARRL On The Air Podcast: The On the Air podcast is a monthly companion to On the Air magazine, ARRL’s magazine for beginner-to-intermediate ham radio operators._____________________________________________________________________
Other Content:
From time to time live audio from space missions, ISS space walks, ARISS etc. will be streamed on the Network. In some cases there will be announcements made before the time. However it all depends on the time and the weather. Moral of the story is to to monitor the ZS-Link Network permanently.
Please note that this schedule can change at any time without prior notice.
Monday, January 2, 2023
Terugvoer "Lippeklap" Net - Re: Reboot Amateur Radio vandag 1 Januarie 2023!
Die Eden Amateur Radio Klub ZS1ERZ het nou 'n webtuiste geskep na aandleiding van gister middag se "Lippeklap Net" op die ZS Link Netwerk met die onderwerp "Reboot Amateur Radio vandag 1 Januarie 2023!" Corne ZS1COR het besluit om amateur radio te Reboot deur "te doen". Hy het 'n webtuiste geskep en daar is sommer klaar baie interessante amateur radio bedrywighede en videos op die Eden Blog. Gaan kyk gerus!
Skakel: https://zs1erz.blogspot.com/
Dankie ook aan die volgende radio amateurs wat nie net praat nie maar ook doen. Kom ons doen so voort in 2023:
Corne ZS1COR
Thys ZS1TBP
Olivier ZS1OLI
Hugo ZS1WS
Daar mag ook ander radio amateurs wees wat begin doen het. Stuur vir my gerus die inligting sodat ek dit op die Blog kan publiseer. My epos is: sawois05@gmail.com
Sunday, January 1, 2023
Saturday, December 31, 2022
Terugblik op die Verlede / Down Memory Lane “OSRAM BERG TYDREN” 14 AUGUSTUS 2004 deur Johan Terblanche, ZS1I
Die taaiste en veeleisendste tydren in Suid Afrika? Ja, dit is hoe baie deelnemers die “Mountain Trail” tydren bestempel wat jaarliks in die Aliwal-Noord, Barkly-Oos omgewing gehou word. Ek het die jaar die voorreg gehad om as waarnemer deel te vorm van ‘n span radio-amateurs wat verantwoordelik was vir kommunikasie tydens die tydren. Ek praat hier van die Bloemfontein
Radio Amateur Klub.
Dennis Green, ZS4BS, was die hoof-organiseerder gemoeid met radio kommunikasie. Hy het dan ook stelling ingeneem by die tydrenkoofkantoor wat ’n uitsig gehad het oor die Garieprivier (sien
foto hierbo).
Vervolgens ’n opsomming van gebeure: Vrydag, 13 Augustus 2004 so ongeveer 15:30 begin die 145.750 Aliwal-Noord-herhaler skielik te lewe terwyl een vir een radio amateur in-rapporteer. Hulle
gesels lekker met mekaar soos wat hulle mobiel raak vanaf Bloemfontein in die rigting
van Aliwal-Noord. Die manne is in ’n gemoedelike stemming en die opgewondenheid in hulle stemme is duidelik hoorbaar. OK Nico, ZS2N, van Aliwal-Noord verwelkom elkeen op die herhaler en gesels die manne onafgebroke tot hulle aankoms.
Die herhaler raak stiller soos wat elkeen sy oornagfasiliteite binnegaan en regmaak vir aand-ete. Natuurlik die gebruiklike braaivleis en kuier om die vuur. Net na 18:00 vertrek ek en Nico, ZS2N, na die tydren hoof-kantoor om blad te skud met Dennis, ZS4BS. Met ons aankoms is Dennis besig om die die HF-antenna op te trek en kort voor lank kon die finale toets gemaak word om te sien of alles reg werk. Die HF-stasie het bestaan uit ‘n tuisgeboude Dipoolantenne, Yaesu FT-77 met
bypassende kragbron en SWR-meter. Die 2 meterstasie was in die vorm van die nuutste Icom V8000 met 75 watt uitsetkrag. Net voordat ons wou vertrek maak Martin, ZS4MS, sy opwagting en word die vertrek uitgestel met 10 minute. Nico gee hierna te kenne dat hy sy toerusting wil
gaan pak aangesien ons vroeër die volgende oggend wil vertrek na spesiale trajek nr. 4 nl. Bottlenek.
Al die toerusting was so teen 21:30 gepak en was ons gereed vir die volgende dag se opwinding.
Intussen het die tydrenwerktuigkundiges ook nie op hulle laat wag nie en is finale
verstellings gemaak aan motors wat kort-kort gebrul het in die strate van Aliwal-Noord.
Dit is Saterdag 14 Augustus 2004. Motors brul en bande fluit soos die manne gereed maak om te vertrek na die eerste trajek. Ek en Nico, ZS2N, vertrek teen 07:15, maar op pad merk ek dat daar so
twee blokke weg van Nico se QTH digte swart rook die lug in trek en dat dit vinnig
vermeerder. Ons besluit om ondersoek te gaan instel en tot ons verbasing was ’n lapa
aan die brand by een van die huise. Brandblussers (let wel nie die brandweer nie want die brandweerwa se battery was pap) was reeds op toneel, besig om die vlamme te probeer blus. Hulp kon nie verleen word nie en is daar besluit om koers te kies na spesiale trajek 4 Bottlenek.
Dit was ’n koel oggend maar die weer was besonders goed vir die tyd van die jaar, in ag genome dat die area wel bekend is vir sy koue weer en sneeustorms. Nietemin het ons besluit om
genoeg warm baadjies saam te neem aangesien ons na ’n gebied toe op pad was, wat bekend is daarvoor dat die weer in ’n ommesientjie kan verander. Dit was teerpad tot in Barkly-Oos, daarna grondpad in die rigting van Rhodes. Nico het sy eie tydren gery. Sy nuwe voertuig moes klippe
en slote trotseer en was die laaste herstelwerk aan die pad seer sekerlik so 5 jaar gelede gedoen. Hi Hi!!
Ja, julle dink ek is besig om te oordryf. Geensins nie want twee ondersteunings-voertuie het op die R396 omgeslaan. Gelukkig is niemand ernstig beseer nie. Na die strawwe grondpadrit arriveer ons uiteindelik by die begin van spesiale trajek Nr. 4. Gou is daar uitgepak, maar nie voordat ons
die dik baadjies aangetrek het nie, want wat ‘n lekker oggend was, het toe verander met ‘n yskoue wind wat rooi stof orals laat opslaan het. Die antenna mas is staangemaak en die G5RV-antenna
opgetrek (let wel geen 2 m-kommunikasie is vanaf die trajek moontlik met die tydrenhoofkantoor nie.)
Die Kenwood TS-570S is staangemaak, maar O...wee.. die antenna wil nie instem nie (Murphy of Spike het saamgery.) Die G5RV is laat sak en ‘n verstelling gemaak, want kyk dinge moes
nou gebeur aangesien die eerste motors reeds in aantog was. Daar is weer probeer instem en die keer was alles reg net voordat ons die “back-up” B25-radio wou gebruik. Maar dit was nie die einde van “Murphy of Spike” nie. Geen kontak kon met die tydren hoofkantoor gemaak word nie. Na so ‘n paar “benoude” roepe maak Dennis, ZS4BS, sy opwagting met ‘n 9+ sein.
Kort voor lank sou die tye begin inrol wat deurgegee moes word na tydrenkontrole. Ons kon nou regtig die warm koffie en toebroodjies geniet net voordat die trajek ‘n aanvang neem. Die
“marshals”, tydrenmotors, nooddienste en toeskouers daag op en was dit nie lank nie
of nog meer stof en sand trek deur die lug soos die manne spook om weg te kom. Tye
word verkry vanaf die trajekkoördineerder en deurgegee na Dennis, ZS4BS. ‘n Spesiale versoek word ontvang vanaf die tweede in bevel van die tydren dat beide ek en Nico tussen die vertrekpunt en die HF- stasie ‘n tweede radio moet gebruik ten einde kommunikasie ten alle tye daar te
stel in die lig van die twee ongelukke op pad na die trajek. Hierna beman Nico die HF-
stasie terwyl ek 2 meterkommunikasie hanteer tussen die wegspringpunt en die HF-stasie. ‘n Helikopter asook goed toegeruste noodvoertuig maak hierna hulle opwagting, maar gelukkig was dit die einde van die ongelukke en was daar nie van hulle dienste gebruik gemaak nie.
So vinnig soos die voertuie gekom het, het hulle ook weer vertrek en kort voor lank was dit tyd gewees om die stasie “af te breek”. ‘n Beroep is gedoen deur die tweede in bevel om veilig terug te bestuur en dit is toe ook wat Nico gedoen het , want oppad terug het ons die plekke gesien waar
die twee ondersteuningsvoertuie die pad verlaat het. Bande, dakreëlings, glasstukke en merke was duidelik sigbaar.
Die Aliwal Noord herhaler was net buite Barkly Oos weer hoorbaar en het ons verrigtinge so met
die terugry na Aliwal Noord gevolg. Alles het vlot verloop en na so ‘n uur en ‘n half se ry was ons weer terug by die beginpunt van die tydren. Daar is besluit om by die eindpunt van die laaste trajek bymekaar te kom en die sneltrajek saam te geniet. Verskeie radio amateurs het hier by ons
aangesluit en is daar lekker gesels en geskerts. Nabetragting is ook gehou en was almal dit eens dat die kommuniksie foutloos gehanteer was. Voorwaar ‘n pluimpie in die hoed van die Dennis,
ZS4BS , en die Bloemfontein Amateur Radio Klub. Julle kan trots wees. Amateurradio het ‘n baie belan-grike diens aan die gemeenskap gelewer. Doen so voort.!!
Die “2004 OSRAM Bergtydren” is verby en was dit nie vir my moontlik om by elke trajek aan te doen en blad te skut met die aangewese radio amateurs nie, iets wat ek graag sou wou doen. Tyd laat dit nie toe nie... of ..... Wie weet dalk verkry ek ’n borg om so te doen in die “2005 MOUN-
TAIN TRIAL”
Hoe lyk dit Dennis, is daar plek in “CAR 0” dan kan daar volledig verslag gedoen word en foto’s geneem word van alle betrokkenes. HI HI !!!
LAASTENS: Kan iemand dalk vir my sê wie die tydren gewen het? ...........Toemaar ek weet!!!
Red ZS: 2004 OSRAM Mountain Trial It is said that the Mountain Trial is the toughest motor rally in South Africa. Johan ZS1I, attended the 2004 OSRAM Mountain Trial with his brother-in-law Nico, ZS2N.
Johan gives a run-down of the rally activities from a radio marshal’s point of view. Johan and Nico manned the start of special stage 4 – Bottelnek.
Radio amateurs of the Bloemfontein RAC (and previously Bloemfontein Branch) have provided radio communications for the past 22 years.
- Radio ZS (October – December 2004)
Tuesday, December 27, 2022
Playing custom message on AllStar Node
Background:
I wanted to play a custom message on my Allstar Node, not just the pre recorded files. I found an easy way to do it.
Create it:
Create and audio file using Audacity or an audio editor of your choice. It you already have and audio file that you would like to play on AllStar then Import the file using Audacity. Find your audio file and open it or if you use Import the file will be opened in the Audacity as an audio track.
The file should be Mono, 8000 Hz 16-bit PCM with Project Rate set at 8000 Hz. Export as WAV. Give the file a name (short as possible) Save as type must be WAV. Encoding can either be Unsigned 8-bit PCM or Signed 16-bit PCM.
Go ahead save it / export it. In Audacity we use Export
Upload it:
Open WinSCP (Windows Program) or any other software and connect to your Raspberry Pi. Upload your WAV file to /var/lib/asterisk/sounds
Convert it:
We will use sox for converting. Open PuTTY (Windows Program) and connect to the Raspberry Pi, Change directory to “/var/lib/asterisk/sounds” and enter the following.
For a GSM File:
sox YOURFILENAME.wav -r 8000 -c 1 YOURFILENAME.gsm
Note sox and YOURFILENAME in small letters.
For a U-Law File:
sox YOURFILENAME.wav -r 8000 -c 1 -t ul YOURFILENAME.ul
Note: sox and YOURFILENAME in small letters.
Now we should have a new file with either a GSM or U-Law Codec extension. Your choice!! Please note you cannot have the same file name for gsm or u-law. Choose a different YOURFILENAME for each Codec.
All we have to do now is to restart Asterisk Server by using the AllStar dashboard or calling astres.sh script at the command prompt. After Restart we can test the file.
Test the File:
Now we can test it on Asterisk by entering to the CLI:
In PUTTY you should be in the following directory “/var/lib/asterisk/sounds”. At the command prompt type :
asterisk -r
enter
PUTTY will now be in the CLI mode.
In MobaXterm log into your node and the AllStar dashboard will appear. Select 11 – Run Asterisk CLI Client. Once enter is pressed you should be at the CLI prompt.
For World Wide play type:
rpt playback 49355 YOURFILENAME
enter
This will play the file to all the nodes that you are connected and also on RF Links / Repeaters
49355 is your node number.
Please note that you don’t need to add the extension after your file’s name.
For Local play type:
rpt localplay 49355 YOURFILENAME
enter
This will play the file to only your node and your RF Links / Repeaters
49355 is your node number.
Please note that you don’t need to add the extension after your file’s name.
I prefer to play the File while using MobiXterm in Windows.
Playing the file via CRON:
If you want to play it via CRON on scheduled time or just play it outside of the CLI just use:
asterisk -r -x "rpt playback 12345 YOURFILENAME"
Hope this short script will be of benefit to you on how to play custom or already created audio files on your AllStar Node.
Compiled by:
Johan ZS1I
Mossel Bay
27 December 2022
Sunday, December 25, 2022
Wednesday, December 21, 2022
How to convert an IRLP (Internet Radio Linking Project) Node into an AllStar, SVXLink or Echolink Node
I have just completed the install/build/modification of an SVXLink Server on a Raspberry Pi 3 b connected to a modified IRLP Board which is then connected to a amateur radio VHF Transceiver. Lets take a closer look at the main "ingredients" of this project.
Overview of the Project:
What is an SVXLink Server? The SvxLink Server is a general purpose voice services system, which when connected to a transceiver, can act as both an advanced repeater system and can also operate on a simplex channel. One could call it a radio operating system. SvxLink is very extensible and modular. Voice services are implemented as modules which are isolated from each other. Modules can be implemented in either C++ or TCL.
Examples of modules are:
Help — A help system
Parrot — Play back everything that is received
EchoLink — Connect to other EchoLink stations
DtmfRepeater — Repeater received DTMF digits
TclVoiceMail — Send voice mail to other local users
PropagationMonitor — Announce propagation warnings from dxmaps.com
SelCall — Send selective calling sequences by entering DTMF codes
MetarInformation — Play airport weather information
Frn — Connect to Free Radio Network (FRN) servers
What is a Raspberry Pi 3 b? The Raspberry Pi 3 b is a low cost high performance single-board computer. The Raspberry Pi was developed in the UK by the Raspberry Pi Foundation. The Raspberry Pi Foundation's goal is to "advance the education of adults and children, particularly in the field of computers, computer science and related subjects." Many people have used Raspberry Pi’s to make things like cameras, video game consoles, robots, web servers and media centres.
What is IRLP (Internet Radio Linking Project) about? The aim of this project is to reliably and inexpensively link amateur radio systems without the use of RF links, leased lines, or satellites. The IRLP uses Voice-Over-IP (VoIP) custom software and hardware. Coupled with the power of the Internet, IRLP will link your repeater site or simplex station to the world in a simple and cost effective way. IRLP operates a worldwide network.
What is AllStar? AllStarLink is a world wide network of Amateur Radio repeaters, remote base stations, and hot spots accessible to each other via the Internet and/or private IP networks. AllStar software runs on a dedicated Linux computer (including the Raspberry Pi) that you host at your home, radio site, clubhouse, school, university, workplace, or computer center. AllStar is based on the open source Asterisk PBX and is released under the GNU GPL and is free for anyone to use. The core of AllStar and AllStarLink is the powerful app_rpt application and associated modules that load into the Asterisk PBX system.
As can be seen from the above each one of the building blocks are fairly complex and powerful tools that can be used by radio amateurs. In this post I will skip AllStar and will later provide info in a future posting. Lookout for the posting!
Background of this Project:
My first VOIP AllStar Node was build way back then and it consisted mainly of a Raspberry Pi 3 b, Hamvoip AllStar Software, modified USB Soundcard Dongle and a UHF Handheld Radio. I modified the USB Soundcard Dongle to obtain PTT and COS from the onboard chip. I stuffed up 2 dongles and was successful with the third board. See my eyesight is bad and this resulted in bridges on the surface mount chip. Be as it may the node is still running and used as the GRHub Network Node.
After establishing the GRHub Network in Mossel Bay it soon became apparent that we need a few more nodes in this area. I did not look forward to modify another USB Soundcard Dongle or to import ready made URI (USB Radio Interface) or any of the other boards as our currency would push cost through the ceiling. I looked at several alternative options relating to the USB Radio Interface Boards/Units.
Now this is where I ran into IRLP. (Internet Radio Linking Project) I considered obtaining an IRLP setup locally as I knew there was a few IRLP nodes up and running in the past. I would run an IRLP node and link that to the existing GRHub Network Node. However I had one big problem! IRLP is not opensource and is not compatible with other networks. This would mean that I will have to go through a registration process to obtain all the necessary "goodies", pay the prescribed fee which once again would push the cost up due to the Rand / Dollar currency exchange. Once again not a viable option. Another hurtle was the fact that IRLP can only support half-duplex audio.
During my browsing of the Internet regarding IRLP I looked at the PCB interface closely and noticed that it still uses a 25 pin parallel connector (no problem) however my eye noticed that provision has been made for several indicating LED's example, COS, PTT, DTMF, AUX1, AUX2, AUX3. This raised the question why can this PCB not be used as a radio interface for SVXLink, Echolink or AllStar or for that matter any other radio interface module.
I started to gather more information. Remember IRLP was used on a way-back Desktop Computer. I did not want to go that route. My thought was to use a Raspberry Pi with SVXLink installed, attach a Syba USB Sound Card and connect the computer and the sound card to the IRLP PCB and finally to the Radio. But will this work? Well I had to give it a try! I obtained two of the IRLP boards after advertising on the Pretoria Amateur Radio Swop Shop page. This was risky as if it does not work then I can throw the boards in the Junkbox to be used as spare parts.
I looked for similar projects but could not find any concrete information. I would have to rely on the bits and pieces I gathered from the IRLP, Raspberry Pi and SVXLink sites. I found enough info regarding the IRLP Project that enabled me to use the interface with the Raspberry Pi but no info on using the IRLP board with other software for which it was never intended. I was determined to get this project to work. The end result it is working great. I received several reports that the node sounds great. Of great benefit is the fact that SVXLink gives me several choices as mentioned supra.
I am not going to go into much detail here as this will lead to a very large posting. Ok lets start with all the parts you going to need:
Parts List:
Raspberry Pi 3 b
5v Power Supply Module
5v Buck Converter Power Module
Power Socket
Modified Power Cable (USB)
On/Off Switch
Fuse Holder
Ethernet Extension Cable
9 Pin Ribbed Serial Cable (Comes with IRLP Kit)
25 Pin Modified GPIO Cable (Make Up)
Syba CM119 Soundcard Dongle
7 Leds (Green, Blue, Red, Yellow)
7 x 330 Ohm 1/4 watt Resistors
Scrap copper connecting wire
7 x LED Holders
Cabinet
Red and Black Twin Flex Wire + odds and sodds
Construction/Modification:
As stated before I will not go into detail here but I will however provide you with all the links and some images how to construct and modify this great working node.
IRLP Information: Manual + Images GPIO Cable, Board Mods and Complete Setup
Syba Sound Card Modifications: Start the conversion by carefully opening the device. Be careful that you don't cut yourself or run a jeweler's screwdriver through your hand. This process is much like opening a clam shell - using a pocket knife or small screwdriver with caution. It might be helpful to grasp one half of the case in a small vice. Also, be careful not to ram the knife or whatever into the interior of the unit, otherwise damage to the PC board or components can result.
Remove the bias resistor R6 on the CM119 side of the board. This chip resistor, marked R6 - 1.2k ohm [122], normally supplies voltage to the electret condenser microphone. These microphones have an internal audio amplifier which requires voltage to operate. The removal of this resistor does two things: First, it removes the voltage on this lead eliminating the need for another coupling capacitor. Secondly, it raises the input impedance from 1.2k to the value of the input control potentiometer - 100k ohms. See the photo below for a detail of the location of this resistor.
On the Microphone input we need to add a 1K resistor in series to reduce the gain. There is also a Bias voltage on the mic input so the 1K also protects the radio from this voltage, and in some cases a capacitor will be needed to block the DC voltage.
How to install/setup:
1. Raspberry PI OS – Bullseye
2. SVXLink
3. USB Sound Card
4. Alsamixer
5. GPIO
6. Radio Interface
Click HERE
Connecting LED'S from the IRLP LED'S to the front panel LED'S on the cabinet: Connections are also made from the 5v Power Module that powers the Raspberry Pi to the Buck Converter which has been turned down to provide 3.3v to the front panel LED's and for the power LED. The connection for the power LED comes from the 5v Power Module. Front panel LED'S (COS, PTT, DTMF, AUX1, AUX2 and AUX3) are pulled down by Pi and IRLP boards through 330 ohm resistors. The positive side of the LED's goes to 3.3 volts from the Buck Converter. The power LED indicator is fed from the 5v supply through a 330 ohm resistor. See the photo below for a hand drawn diagram.
Connecting the node to an amateur radio transceiver: Refer to the IRLP Information Manual above and also to your Radio's Owners Manual to make the necessary connections. You will need to make up a cable for this purpose as radio connections differ from radio to radio.
This new node is as far as I know the first VOIP node in South Africa that uses a modified IRLP interface board that dates back to the 1990's. Yep you read correctly. VOIP and IRLP was invented in the late 1990's as a way to connect/link repeaters, simplex links using the Internet, there are still older equipment that can be used to provide far better performance than new equipment.
The new node was tested over the past few weeks to ensure that all the current functions work as expected. Curtis ZS6CMO obliged and connected to the new node. We did a quick connect and audio test which was successful. I would like to thank Curtis for assisting me with the tests. I decided to connect the new node to the UK Hubnet to see if there is any "fish out there". Low and behold it was not long before Andy VK6KQ (Australia) called and Marko ZS1NEU returned his call via RF on 2 Meters FM. The two of them had a great QSO and was later joined by John VK6LWB (Australia) and Andrew 2W0INY (UK). Marko was mobile and I was stationary mobile with only a 2m handheld on hand. In my opinion the audio quality and reception was just as good as the ZS1I-L AllStar Node that is currently the main node in operation.
Thus far I am
quite impressed with the functionality of the new node. The node is
still in a test phase and I will provide full details in a future post
in this regard. The hardware setup of the node is now completed however I will still play around with the
setup of the software. I have not tested the node with AllStar software but will do so in due coarse. Hopefully I will be able to burn a new SD Card with the AllStar software on it, make a few changes and run AllStar from this node. AllStar is after all capable of much better audio quality. I will provide my findings running AllStar on this node in a future posting.
I would like to invite radio amateurs to
use the node when it is reflected in Echolink. It will be weekdays on
test between 09h00 - 16h00 SAST.
The node particulars are:
- ZS1I-R GRHub Network, MSB, ZA
- Node Number: 929614
- Connect via Echolink or RF 145.550 Mhz 88.5 hz CTCSS
- This node will be connected to the GRHub AllStar Network
- The node timeout after 5 minutes if there is no activity and you need to reconnect.
- Currently only one station can connect at a time. This will be changed in future.
- Further modules with great functionality will be added in future. One such future is the ability to leave and audio message via the QSO Recorder on the mailing list.
What will the new node be used for? Well that is an open question that I cannot answer at this stage but I can assure you that this node will be the "heartbeat" of the GRHub Network. I am also working on another experimental VOIP node that will if successful be easy and cheap to build. I envisage that this node concept will allow fellow radio amateurs to obtain their own node to be used in the shack, mobile or portable. Lookout for this node.
Finally I would like to thank the following radio amateurs for their support and willingness to assist me in testing this project. Although I only mentioned a few here you are most welcome to join in on the fun:
Curtis ZS6CMO, Thys ZS1TBP, Marko ZS1NEU, Andy VK6KQ, John VK6LWB and Andrew 2W0INY.
Images and Video: (Click on images for larger view.)
Video Clip: (I apologize for the quality of the video as I did not have enough hands or a decent camera.)
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