Maintenance Hanskop 20170722

Jan (ZS1VDV) and Rassie (ZS1YT) went to Hanskop to investigate the controller not responding to DTMF.

Started packing vehicle 06:30, left Stellenbosch 07:00.

Had to drive very slowly up as the road is in very bad condition and had the sun just over the horizon.

On site by 08:15. The temperature outside was 1.2 degrees, the wind was cutting through everything.

The problem with the controller was found to be interference on the 145.600 Repeater.  The interference is not from our equipment but most likely from WISP equipment.
The 145.600 repeater’s SQL was closed to 1.1uV (about 4 times more that what it should be).  This only helps about 80% of the time. The interference will need more work/investigation.

All SWR was checked. VHF repeater (1.1), UHF repeater (1.1), Jonaskop link (1.6).

CTCSS was added to the 434.650 repeater.

Home at Stellenbosch by 12:45.

Maintenance Hanskop 20161030

David (ZS1DDK), Andre (ZS1AN) and Jan (ZS1VDV) did maintenance on Hanskop.

Summary:
Removed UPS, replaced with battery and charger
Changed UHF repeater frequency (434.650 output/ 433.050 input)

Log:

Left Bellville 06:45.
Packed all equipment in Stellenbosch (07:45) (4 ammo crates, 2 x 15L storage boxes, 1 tool box(very heavy), Pelican case, comms test set, table and chair). (Takes about 1.5 hour to prep all equipment).
Collected battery and low drop out switch in Somerset West from ZS1V (08:00).
Collected key from ZS1YT (08:15).
Arrived on site at around 09:05. (15 degrees Celsius)

Unpacking

Unpacking

Removed faulty UPS (Battery banks is dead).
Installed new Victron Energy Charger.
Collect more equipment at N2 (Thank you Melissa (ZS1MEL) for driving from Stellenbosch).
Installed battery (donated by ZS1V).

Backup Battery

Backup Battery

Changed power wiring for new configuration.
Retuned UHF duplexer for new frequencies (434.650 output / 433.050 input).

Retuning Duplexer

Retuning Duplexer

Duplexer

Duplexer Results

Made changes to repeater configs.
Tested UHF repeater (1.5 SWR and 0.56uV sql)
Made changes to link controller.
Left site 14:23. (4 degrees Celsius)
Drop key at ZS1YT 15:15.
Unpack equipment in Stellenbosch 15:50.
Home in Bellville 16:30.

Maintenance Hanskop 20160918

AGENDA:

Reinstall 434.600 Repeater and Duplexer
Research interference from 145.600 Repeater on commercial repeater
Research interference on 433.000
Research 145.600 dropout on input from Jonaskop.

Jan(ZS1VDV) left Stellenbosch 07:30.

Reinstalled 434.600 Repeater and Duplexer. Checked SWR (1.1).
Interference on 433 was determined to not be within the hut.

The interference from 145.600 and the commercial repeater was determined to be proximity. Moving antennas will be investigated. (Before tower fall it was 11m vertical, now only 1m vertical and 3m horizontal)

Could not replicate the dropout. Problem will continue.

Back in Stellenbosch 12:40

Maintenance Hanskop 20160904

Jan (ZS1VDV), David (ZS1DDK) and Andre (ZS1AN) started early at around 06:00.

We arrived on site around 08:15.

View from Hankop

SWR was tested on a few areas on the UHF repeater, duplexer and antenna.

It was found that the repeater has a permanent PA error and will need to be serviced.  The duplexer, harness is also suspect and have been returned for servicing.  The antenna and coax was all working fine.

The VHF main power supply was moved from UPS power to mains power.  This will now enable an short over beep on the VHF repeater when power is out on site.

Returned home around 12:00

Maintenance Hanskop 2016-05-17

It was an early start 05:45 in Stellenbosch.  06:10 Somerset Wes. 06:30 Strand.

ZS1VDV, ZS1V and ZS1YT were on site at 07:30.

Moved temporary brackets further apart to stabilize new 6m galvanized pole.
Stays were added.
Mast groundwire added.
Antennas moved further apart.
All seals were redone in dry weather.
Cable tray was reinstalled.
VHF repeater SWR 1.1, UHF repeater SWR 1.2 and Jonaskop Link Radio SWR 1.7.
New power supply installed (Donated by ZS1K).
UHF repeater and Jonaskop Link Radio is connected to new power supply.
VHF repeater connected to Nova power supply.

Collapsed tower visible on the left. WCRWG temporary installation visible on the far side of the building with Jonaskop link beam at the top.

Collapsed tower visible on the left. WCRWG temporary installation visible on the far side of the building with Jonaskop link beam at the top.

Default linking moved to all linked.
DTMF updated to measure 2 power supplies.

Home 15:00

Maintenance Hanskop 2016-05-14

Jan(ZS1VDV) started to pack all the equipment at 05:15 in Stellenbosch.

Picked up some Heliax and antennas at (Paul) ZS1V 06:10 in Somerset West. From there it was a quick hop over to get (Rassie) ZS1YT.

On our way up to the high site, we noticed that we could not see our tower, but did not think much about it, as it could be the angles from the back or maybe weather.

Tower on the ground

Tower on the ground

When we got on site (07:50), it was very clear that every plan of what was going to happen was 100% out the door. The first action was to recover all our current Heliax and antennas. We lost a RG214 connector (ripped from the cable), the recovered Heliax still needs to be tested but some real bad bends and marks are visible.

Next was to assess if we could do a temporary hack antenna installation with everything on site, which was not possible. With the help of ZS1V the plan was worked out. Andre(ZS1AN) and Kobus(ZS1K) did a few supply store stops and got a pole, more heliax and other sundries from ZS1V to bring to the high site.

ZS1VDV working on linking cables

ZS1VDV working on linking cables

While we where waiting for the supplies, ZS1VDV did a few changes to the controller link cables and audio alignment. A new 20A solid state power supply was installed. The next step was to clean and prep the area for antenna installation.

ZS1YT prepping Heliax

ZS1YT prepping Heliax

ZS1K standing infront of the tower on the ground, which is not very bright :)

ZS1K standing infront of the tower on the ground, which is not very bright 🙂

ZS1VDV drove down to the gate to open for ZS1AN and ZS1K. They arrived on site around 13:00. As soon as they arrived the weather started to turn for the worse. ZS1AN and ZS1K installed the 2 mounting brackets and ZS1VDV and ZS1YT prepped the new Heliax to be installed. Then ZS1VDV had to install the antennas on the mast in some very big wind and wet weather. A new FDC145 was installed for the VHF antenna, the dipole was reused for the UHF repeater and another UHF yagi was installed and pointed towards Jonaskop. The SWR was measured. The VHF SWR was 1.7 which was a bit high, but in the weather and time frame could not be corrected. The UHF repeater and link SWRs were 1.5 and 1.4. At this point it was also identified that there is a power problem on site as every now and then when touching a coax, a shock was felt. This was not ignored, just not enough time to resolve it at get everything running again.

Sealing cables

Sealing cables

In a very small weather opening, the connectors was sealed. The last steps was to cable tie all the new Heliax and clean up the site.

Antennas after install

Antennas after install

We left the site around 16:30.

At Strand ZS1AN and ZS1K left for home. ZS1VDV dropped off ZS1YT at home and the recovered Heliax and antennas at ZS1V.

Got home around 18:45 and the vehicle was off loaded by 19:15.

It was one of those days where you leave home in the dark and get home in the dark.

There is a list of todo items for the site. A future maintenance trip will be required.

For the first time ever in the Western Cape Repeater Working Group history. A contact was made between the Piketberg and George repeaters. The path for this contact, Piketberg -> Haweqau -> Bellville -> Hanskop -> Jonaskop -> Riverdal -> Danabaai -> George (8 hops, 15 radios and repeaters)

Maintenance Hanskop 2016-03-13

On Sunday 2016-03-13, ZS1V and ZS1TAF went to Hanskop to further troubleshoot the Jonaskop link problem. It was 5 degrees, windy and raining, limitting the amount of work that could be done outdoors. Nonetheless, several tests were done with a handheld 70cm beam and a handheld radio. Some re-orientation of the Jonaskop link antenna was also tried.

The functioning of the link controller itself was also verified as correct.

The Jonaskop link radio was removed for bench testing. The SWR of the link antenna was found to be unnacceptably high at the link transmit frequency and will be replaced on a subsequent trip.

Maintenance Hanskop 2016-03-06

ZS1DDK and ZS1AN started at around 05:00 from Bellville.

Picked up ZS1VDV at around 06:00 in Stellenbosch.

Got they key from ZS1YT at 06:30.

Arrived on site 08:30. Did a bit of 4×4 in the mist.

  • Checked the SWR of the VHF repeater(1.7)
  • Dismantled the full rack.
  • Built in a UPS.
  • Installed duplexer and bandpass filter (had to tune the band pass filter).
  • Installed VHF, UHF repeaters and link radio.
  • Installed a 50A power supply.
  • Installed UHF duplexer.
  • Installed link controller.

 

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We struggled with local interference on site on the UHF and VHF repeaters. The VHF repeater squelch was closed to 0.37uV. (works now for about 99% of the problem). For the UHF repeater we had to switch on CTCSS.

The UHF link to Jonaskop is not operational, but the problem is suspected to be a misalignment on Jonaskop side (did recheck the alignment of the yagi on Hanskop side).

Hanskop tower 2016-03-06

Had a quick bite to eat in Grabouw.

Back in Stellenbosch at around 17:00.

Back home in Bellville around 17:45.