I left my QTH around 10h00 on Wednesday and headed to the 145.625 Voorstevlei high site. It was an extremely warm day with temperatures reaching 36 ͦC at lunch time.
On arrival, the ‘overload’ light on the power supply was on (there was lightning in the area and this could have caused some damage). I swapped out with a replacement power supply and did some testing. I found that the controller was also not triggering the repeater. The 70cm link radio was picking up the signal from my handheld and I could hear the audio clearly, but no reaction from the controller.
SWR on 2m was tested as 1.2:1
The controller was removed and the 70cm radio turned off for now.
The PSU will be repaired, and the controller tested to see where the problem is.
I was able to contact ZS1DFR via the 145.625 repeater at the time I was on the site, and then tested again with handheld en route home, with Schalk, ZR1SWB.
After a puncture repair and wheel change, I made it home by 15h30.
A team of 5 met at 09h00 on Tuesday, 22 October at the Manor House at the base of Constantiaberg and took a leisurely drive up and around Elephants Eye Cave to where the mast is situated. The road was rough in a few places, but we all managed our way without any damage to our vehicles.
We could not have asked for better weather conditions, a beautiful summers day with no wind. The temperature was also very comfortable.
For some time, the repeater had caused interference when it rained and when the wind was blowing.
As we needed to climb the tower, we were reliant on Sentech employees to be present. On their arrival, they unlocked the gate at the base of the tower and work commenced. On inspection, it was found that the antenna cable going to the feed cable had chaffed through the outer casing and water had got into the outer plastic shield.
The antenna was replaced with a new one and all cables were tightly secured to prevent any movement on the cable. SWR tests were conducted before and after the antenna was replaced and a few tests were done with very good results (SWR and audio). Settings on the repeater were checked and all seemed to be in working order.
Once all the work had been completed, we had a lunch snack, compliments of David, ZS1DDK.
A final check that all was in order, and we slowly headed down the mountain. Today’s special thanks go to Schalk Burger (ZR1SWB), Rassie Erasmus (ZS1YT), David de Kock, (ZS1DDK), Michael Taylor (ZS1MJT) and LEM (ZS1LEM).
On 15 June 2024, ZS1DDK, ZS1YT, ZS1ATX, ZS1MJT and ZS1IX installed the new solar panels on Hawekwa. During the severe windstorm of 7 April, the wind tore off one of the solar panels and also damaged the 6m antenna.
Where is the 17 spanner?
The group left around 07:00 and with beautiful sunshine and almost no wind the task could easily be tackled. By 13:00 the two new panels were installed and connected and the meters indicated that the panels were doing their job. The 6m link antenna has also been repaired.
Let’s hope it isn’t gone
Thanks to ZS1ATX, Z1YT and ZS1DDK who donated the cost of the transport towards the WCRWG.
As Eskom becomes unaffordable, the supply to the premises will be cut off on 30 June 2024. The current 4 batteries are 5 years old and need to be replaced soon. Please feel free to make a donation to the WCRWG for the maintenance of the repeaters in our area. For more information, see wcrwg.co.za
The Jonaskop site lost Eskom supply during the heavy storms of September last year. It was running 24/7 on battery and the one solar panel installed on site.
David ZS1DDK and myself left earlier today for Jonaskop (145.675) with 2 spare power supplies, some tools, spare fuses, etc. to see if we can find a fault and repair it. We have expected either the power supply to have packed up or the earth leakage in our cubicle that has tripped.
The road leading to the site is drivable with a bakke or vehicle that is high off the ground up to the Sentech tower. The portion form the Sentech tower to the concrete strip leading to the Eskom building is still completely washed away. With the Landrover in 4×4 and diff lock on David took the dongas on. It is huge dongas and washed out gravel! We made it and got to the Eskom site. On inspection we found that the Eskom supply has tripped in the main DB board and not in our cubicle. We opened the DB Board and switched the breaker back on. Everything came to live and reports form ZS1TR was that he immediately noticed an increase in signal strength. (On battery the repeater switches automatically to lower power).
We also checked the SWR on the repeater antenna and at 145.07 it was close to 1.5:1 and even lower as we went a little bit lower, closer to 145.000. See photo attached.
We locked up and left the site again. I was home at 15h30 and David at about 16h15.
On Monday 19 April, Francois ZS1Q and Daan ZS1DBJ visited the George 145.700 repeater. The road has not been serviced recently and is still rough going with four wheel drive required and long stretches of black, sticky mud.
The backup batteries were checked and they, and the rest of the site, were found in good order.
On 17 December 2022, a project which has been in the making since August came to fruition.
The high site which previously hosted the 145.725 MHz Onrusberg repeater since late 2016 was taken over by new management. This marked the end of good relationship over many years. The farm on which the Onrusberg high sites are located also got a new owner, further complicating matters.
After some investigation, negotiations and leveraging of existing relationships, a new high site became available.
The started a string of visits (anything between 250 km and 300 km per trip), hours of planning and preparations (including a few trips to buy and pickup stock).
First was a site inspection by ZS1TAF and ZS1V.
During a second visit (4 October) the antennas (folded dipole for VHF and dipole for UHF) were installed on the mast by ZS1TAF, ZS1V and ZS1YT. This was a long and complicated day, as this was not an easy tower to climb and work on. Thanks go especially to ZS1TAF for the donations towards antenna pole and brackets. Over 60m of half inch EC4-50 feedline was installed.
ZS1TAF on mast
Third visit (19 November) was cabinet, cable trays and power articulation by ZS1DDK, ZS1TAF and ZS1YT.
New cable tray and cabinet
Preparation for the fourth site visit was still going strong until 01:00 on the day of the visit. The morning continued at 05:30 and packing all the equipment for the installation and possible eventualities required detailed planning.
ZS1MTF arrived at 07:00and there was just enough space in the double cab bakkie for all the required equipment (2 toolboxes, 8 ammo crates, test equipment, ladder, duplexer, repeater, link controller, link radio, power supply, charger, transfer box, battery, among many other items).
How much more stuff do we need to pack?
ZS1Z and ZS1MTF arrived on site at 09:15. The mist and clouds was thick, with visibility as poor as 5m at times.
After this, the layout of the cabinet and all DC wiring was completed. The DC system includes a 20A linear power supply, a 200 A/H battery, a 30 A charger, an automating transfer switch, and low and over voltage protection box (donated by ZS1EQ), fuse boxes and lots of crimps, power poles connectors and cable. LoRaWAN based telemetry was also installed.
Cabinet with all equipment installed
Next the link controller cabling and sensors were installed.
Lightning protection was installed and new RG214 patch leads were made up and installed for the last section of the run from the antennas. This is always something which takes much longer that expected and uses many more cable ties.
Next the duplexer was installed on the wall. The bracket on the duplexer made it very uncomfortable process. Great care must be taken when handling the cavity filters as the duplexer had more than 10 hours of setup in it alone. The harness is the correct one for the amateur 2m band, and some of the cans have some age on them, and do not want to adjust without some persuasion, all of which complicates tuning. A one port circulator (isolator and bandpass filter), was also installed
Crimping of all internal coax and patch leads (RG223) followed. The double shielded coax crimping must be done with great care.
Duplexer and circulator on the wall
The antenna SWR was checked and found to be in order although the VHF was at 1.5:1, somewhat higher than the expected 1.3:1, and will be investigated on a future visit. The UHF link was at the expected 1.1:1. All outside connections was sealed Scotch 23 and electrical tape (Nitto). The cable trays were closed again with all stainless-steel straps reinstalled and some extra cable tie straps for extra ease of mind.
Outside cable trays
Some radio checks were completed with ZS1L and ZS1YT.
The road home was clear but long, after dropping of all the keys and unpacking the vehicles everyone was home by 22:00.
This concluded the move and upgrade to include backup power and circulator.
As with any move of this magnitude, some small gremlins may pop up, please report as per the weekly status reports. Thank you for all the support.
Rassie ZS1YT en Jan ZS1Z het Vrydag 16 Desember 14h30 op gery na Jonaskop om te gaan ondersoek instel wat die fout met die herhaler is. Na erge verkeer en ‘n baie slegte pad kon ons dit maak tot bo. Die beurtkrag het skade aangerig en gevolglik haak die herhaler vas wanneer die oorskakeling plaasvind tussen die batterye en die kragbron. Die tydelike oplossing was om die herhaler as alleenstaande 2m herhaler te stel en die UHF skakels te verwyder. Dus is die 675 herhaler nou nie gekoppel aan enige ander herhaler nie. ‘n Groter probleem is dat die SWR van die 2m antenna baie hoog is! Dit veroorsaak dat die herhaler terug sny op sy krag. Die 4 stack folded dipole antenna is ook al baie oud en die jare se son en wind en reën het maar sy tol geëis. Die oplossing is ‘n nuwe antenna maar met harnas praat ons van baie geld! Ek sal meer inligting bekom van die koste en dan kan die amateurgemeenskap hopelik bydraes maak.
Die pad is plek plek erg beskadig na die onseisonale reen
