Thursday, March 30, 2023

ZS1I Simple Small Projects: XT60 Distribution Box & Power Strip

This XT60 Distribution Box (or Power Strip) allows you to convert a single power source with XT60 connector into 5 x XT60 outputs. I designed it so the top snaps into the bottom with a moderate fit - it can be disassembled should there be the need of debugging or fixing something. The XT60 connectors all fit tightly in my print - if you desire a less tight fit, you may want to consider printing in 101% scale.






 











The STL files for this project is available  HERE

Aanvullende Inligting VHF/UHF Ring Rigstralers deur Christie Grobellaar ZS4CGR

Die artikel "Ring-Rigstraler vir Satelliet Kommunikasie" in die Februarie 2018 Radio ZS uitgawe verwys.

Hier is aanvullende inligting soos deur Christie ZS4CGR via Telegram op die Amateur Radio 101 groep verstrek.  Ek glo u sal saam met my stem as ek se dat die "DIY" ophys toestel van die 6m Ring Rigstraler uiters vindingryk en vernuftig is.  Maar wag laat Christie ZS4CGR verder verduidelik.

Klik op fotos of te vergroot.


Audio 1 Insetsel




Audio 2 Insetsel


Audio 3 Insetsel



Audio 1, 2, and 3 gekombineerd :


Tuesday, March 28, 2023

Terugvoer "Lippeklap" Net Potgooi (Podcast) Sondag 26 Maart 2023 15h30

Kennisgewing:  Hierdie sal die laaste terugvoer wees ivm "Lippeklap".  Daar is gevoel dat die terugvoer net 'n duplisering is van wat die Net behels het en dat persone wat graag wil weet wat bespreek is, kan inskakel by die Net op 'n Sondag middag.  Daar sal nogsteeds die nodige vooraf kennisgewings uitgestuur word tov wat bespreek of geluister gaan word tydens die Lippeklap Net.


Ons het Sondag na 'n potgooi geluister.  Geen onderwerp was bespreek nie en was daar ook dan geen formele geselsie na die potgooi nie.  

Onderwerp van die Potgooi:

“Digital Radios vs. Analog Radios (What's the Difference?)”


“What’s the difference between digital radios and analog radios?

Are analog radios obsolete? Or do analog radios still have some mission-critical applications?

What’s the biggest problem that analog radios have that’s solved by digital radios?

Do digital radios provide any advantages over analog radios?

Following a major natural disaster, do digital radios provide any advantages over analog radios?

Does it make more sense to invest in digital radios or analog radios environments?

What does the future of the digital radios vs. analog radios debate look like three years from now?

Baie dankie aan al die stasies wat gekoppel was tydens die Lippeklap Net.   Onthou om volgende Sondag middag om 15h30 weer in te skakel by die "Lippeklap"  Net.   Kom sluit gerus by ons aan!

Hoe skakel ek in by die Net?

  • Echolink - Konnekteer aan ZS1I-L, ZS1FC-L, ZS6WDL-R of ZS5PMB-R Neem kennis as die laaste drie stasies nie gekonnekteer is aan ZS1I-L nie, konnekteer dan via  Echolink aan ZS1I-L om by die net aan te sluit.
  • AllStar - Konnekteer aan node 49355 ZS1I of 28052 ZS5PMB-R
  • VHF - 145.550 Mhz Simplex in die Mosselbaai area. Onthou die 88.5 khz CTCSS toon.
  • Enige ander Echolink, AllStar  herhaler of link stasie wat aan ZS1I-L gekoppel is.
  • Gebruik sommer Echolink wat op jou selfoon geinstalleer is.

Monday, March 27, 2023

Changes to the GRHub Network Blog


 Well they say a change is as good as a holiday.  Whether this is true in this case is rather doubting. Be as it may I made the following changes to this Blog:

  • A new HOME page image was added that reflects the beautiful town of Mossel Bay the heartbeat of the GRHub Network.
  • The reading area of the Blog was enlarged which should be of assistance to the visually impaired.
  • A new PAGE was added.  "What is this Blog all about?"  Click HERE to view this page.
  • A new BACKGROUND IMAGE was added.  I changed the technology background to an outer space background.  Well just for cosmetic purposes.  However a darker background image assist with reading topics.

Several other changes and updates will be done over the next few weeks.  More on this in a future posting.

I trust that these changes will enhance our readers experience relating to the GRHub Network Blog.

Enjoy!

Sunday, March 26, 2023

Lippeklap Net 26 March 2023 at 15h30 on the GRHub Network.

Vanmiddag 26 Maart 2023 om 15h30 is dit weer tyd vir Lippeklap Net. Nee ons gaan nie vandag ‘n onderwerp in Amateur Radio bespreek nie, maar ons gaan luister na ‘n amateur radio potgooi. (podcast) Na die potgooi sal daar ‘n algemene lippeklap wees oor enige amateur radio verwante bedrywighede.

Onderwerp van die Potgooi:

“Digital Radios vs. Analog Radios (What's the Difference?)”


“What’s the difference between digital radios and analog radios?

Are analog radios obsolete? Or do analog radios still have some mission-critical applications?

What’s the biggest problem that analog radios have that’s solved by digital radios?

Do digital radios provide any advantages over analog radios?

Following a major natural disaster, do digital radios provide any advantages over analog radios?

Does it make more sense to invest in digital radios or analog radios environments?

What does the future of the digital radios vs. analog radios debate look like three years from now?

Come listen to Mike Humphress (your host) of Commsult Consulting Solutions with special guest Bob White of EMCI Wireless.”

Hoe skakel ek in by die Net?
• Echolink - Konnekteer aan ZS1I-L, ZS1FC-L, ZS6WDL-R of ZS5PMB-R Neem kennis as die laaste drie stasies nie gekonnekteer is aan ZS1I-L nie, konnekteer dan via  Echolink aan ZS1I-L om by die net aan te sluit.
• AllStar - Konnekteer aan node 49355 ZS1I of 28052 ZS5PMB-R
• VHF - 145.550 Mhz Simplex in die Mosselbaai area. Onthou die 88.5 khz CTCSS toon.
• Enige ander Echolink, AllStar  herhaler of link stasie wat aan ZS1I-L gekoppel is.
• Gebruik sommer Echolink wat op jou selfoon geinstalleer is.


Sluit gerus by die Lippeklap Net aan vanmiddag om 15h30 SAST.

Thursday, March 23, 2023

Eskom Loadshedding Solutions - Beat the Blues with this DIY Internet Router UPS Project. (Ver. 2)


This project is a follow up on "Beat the Eskom Loadshedding Blues with this DIY Internet Router UPS Project. (Ver. 1)"  available HERE

The Ver.1 UPS has been in operation since October 2022. I am very happy with the performance of the Internet Router UPS. So far it is working as I would like it to work for my setup. That is until the 3S Battery Pack decided that it had enough of this charging and discharging when Stage 6 is implemented.  It could not handle the load and abuse during Stage 6 events.  Remember the batteries used in the 3S were salvaged from a very old laptop of which the lifetime was already over.   That 3S battery lasted this long was a bonus. 

The ever worsening of load shedding in South Africa and the work-from-home policy for business continuity resulted in the DIY Internet Router UPS Project. Working from home means your home's WiFi networks are more important than ever especially during periods of load shedding. Anyone with a fiber-line connection will know that their Internet connection drops whenever the power goes out. It is annoying if you are in an important meeting/webinar or just browsing the Internet and there is an interruption due to load shedding.

I had three options:

1. Using a conventional UPS ( Bulky and Costly )

2. Use the Mini-UPS Project Ver. 1 ( Just replace the 3S Battery Pack and I am on my way)

3. Construct a new Internet Router UPS Ver. 2 (Use all new components and a Gel Battery) 

You guessed correctly I decided to build an all new Internet Router UPS Ver.2.  As my eyesight is not all that great anymore I again opted to buy modules and join them together for this project.  Google is your friend as you can find a variety of UPS projects that will serve your needs.

Once again this is an ugly constructed project. I used what I had on hand.  The PVC front and back cover was rolled from a 300mm PVC down pipe.  I cut a piece of the pipe in the length, heated it with a heat gun and press it flat between two laminated planks.  Works great and cost nothing.  Can be scrounged from a dumpster.

However it works great and the reason for the ugly construction is that I needed the unit ASAP and there was no time to 3D print a nice looking cabinet for the project.  Ordering an ABS case was also not a option.  I needed the project as in yesterday. 

I am not going to go into full detail as this unit is available on many sites with full instructions and photos. I did however changed the circuitry to my liking and needs.  Here are the features of the unit that I constructed:

1. Automatic Switching ( using a Mosfet IRF 9540 ) between the battery charger and battery pack during a power outage.  More info available in the schematic diagram under images.

2. Two Output Ports: 12V / 3A and 5V / 3A (Voltage and Amps can be changed by turning the pots on the modules)

3. 10 hours of backup time

4. Battery pack with a Gel Rechargeable Battery  12v 12aH

5. Additional Protection via 1N5821 Diodes

6. Additional Filtering via the power modules 

7.  Fuses on both the Battery Charger and UPS

8.  Battery over and under voltage charging protection via YX-1708 Module 

9.  Battery Charger Voltage and Amps can be changed by turning the pots on the XL4015 charger module.  High efficiency up to 96%.  Built in thermal shutdown- and short circuit protection function. Voltage 1.25 - 36 VDC adjustable.  Output current  0-5 Amps.

Finally:  I enjoyed constructing this project.  It is currently on test and I will update this post once I am happy that the unit functions as it should.  Provisional tests were successful, however I would like to see what it will do with stage 4 or 6 load shedding before I can really comment further.

PROJECT IMAGES   (Click on images for larger view.)




 












Maintenance: Amateur Radio Mast at the Coast

  Over a period of time I noticed that one of my radio masts (Ex Wind Turbine Mast) was showing signs of rust where two pipes were welded to...