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.Β  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).Β  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 Hawequa 20170625

Today Jan ZS1VDV and David ZS1DDK went to the site to service the power problem.

It was found that the DC power distribution box was faulty and replaced.

VHF repeater SWR was tested (1.2)
UHF repeater SWR was tested (1.4)
Backup battery voltage was measured (13.8V)

Maintenance Hawequa 20170617

Jan, ZS1VDV went to Hawequa to investigate why the 650 VHF repeater was not working.Β  The worst was suspected, that the mast did not survive the storms.Β  Luckily this was not the case.Β  The mast and building was in good condition.

It was found that the repeater was on, but as soon as it started to transmit it restarted.Β  After long debugging, it was found that the repeater was not at fault but the dc power distribution box and power supply.Β  The fault was corrosion on the conductors in the connectors (dust and soot blasted in by the storms, as well as intermittent power would have caused this), as well as crackling sound in the power supply.

The power supply will have to be replaced on a next visit and serviced.

It was great to see the water flowing off the mountain.