Oceania DX Phone Contest – Wyrrabalong NP 3-4 Oct 2015

The Oceania DX Contest is an amateur radio event held annually on consecutive weekends in October. The first weekend is phone (SSB) and the second is CW (morse code). The first (and last) time I participated was in 2010 as a portable station using a kite antenna. It was a lot of fun and the video has been quite popular. This year I wanted to operate for the full length of the contest, not just for a few hours. I also wanted to operate as a portable station and this meant using low power (QRP). Luckily the contest has a QRP category so I would not need to compete with much bigger stations using beams and high power. Going portable has three advantages: (1) away from city noise; (2) have space for 160m antenna; (3) can qualify a national park for WWFF.

Wyrrabalong National Park map

Wyrrabalong National Park map showing north and south sections


The criteria for the location was based on: (1) must be in a national park; (2) have reasonable car access; (3) near a body of water; (4) room for antennas; (5) clear RF takeoff in all directions; (6) away from RF noise sources; (7) 24hr availability. Most of the criteria for a location can be assessed beforehand by studying internet sites. For this exercise I looked at national parks on the Central Coast of NSW and drew up a short list of possibilities within the Wyrrabalong National Park VKFF-0550. The park is coastal and divided into a large northern section and a smaller southern section. The northern section is virtually at sea level with the ocean to the east and a lake to the west. It is bisected by the Central Coast Highway running north-south. A road off the highway provides access to the park and the beach. Unfortunately the road is gated and closed at night, but I added it to my short list anyway. There did not appear to be any other accessible locations in the northern section of the park.

The southern section of the park was much more familiar as I had done the coastal walk many times. This section has ocean to the east and housing to the west and consists of a long narrow strip. The prominent features are the Crackneck Lookout providing stunning ocean views and a favourite for hang-gliders, and the Wyrrabalong TV translator tower on the southern end of the coastal walk. Of these only the Lookout is suitable. Another location was also found half way along the coastal walk next to some water tanks with access from a nearby suburban street.

Southern section of Wyrrabalong NP showing operating point

Southern section of Wyrrabalong NP

Scoping It Out

On the Saturday of the contest I packed the car and set off for the northern section of the Wyrrabalong National Park at about 3pm. The goal was to reach the location by 5pm and set up in time to start contesting at 6pm. Most of the drive was along the Sydney-Newcastle freeway then head head east through Budgewoi then south through Norah Head to the park. Upon turning off the Central Coast Highway there was a large gate into the park and a sign showing the opening hours. I checked out the carpark at the end of the road and decided that it was not that suitable. Probably the best spot would be on the beach.

Left the northern section and drove through The Entrance township to Crackneck Lookout in the southern section of the park. On the approach road there was a wedding entourage and photographer actually on the road. Proceeding on and just before the lookout there was a gate – one that I had not seen before. Seems the lookout carpark now has restricted hours which seemed odd. The views from there at night are pretty nice. As a consolation, two car spaces have been provided just before the gate about 100m down the road. After a quick scout around and a gawk at the stretch limousine I decided the spot wasn’t as suitable as I was expecting.

Now down to the third option I drove back through the gate and around to the closest road to the water tanks. The road to actually get near the water tanks is gated too but intended to be used by pedestrians to access the coastal walk. The walking distance to the park is about 200m. The area around the tanks has been cleared and was within the national park according to the GPS.  I decided this would be a good spot to operate from though I was unsure how much electrical noise would emanate from near the tanks and the nearby houses. The nearest power lines were 50m away. Maidenhead locator: QF56RO.

Shack at Wyrrabalong National Park

Operating chair and tent at Wyrrabalong National Park


Getting the gear to the site took three trips and then I set up the ZS6BKW antenna on the 9m squid pole with the wire oriented north-south. Next was the double-sized ZS6BKW which was awkward to set up due to the available cleared space. There was little undergrowth as the park had been burnt out recently, but there were still quite tall trees. It took some time to weave the antenna wire through and over these. I used my 10m travel mast leaving the top sections unused, and there was a pronounced bend in the mast due to the load. One antenna crossed the other one but only at about 30 degrees. They were almost parallel. A ground sheet was put down and then an operating chair which would serve as the shack for the evening. Then the KX3 and computer were installed. The chair has a small side table useful for putting things down when not seated in the chair.

Operating chair and tent at Wyrrabalong NP

Operating tent at Wyrrabalong NP


By 6:20pm I was on the air but it was getting dark so I used a headlamp to see what I was doing, especially with the computer. The bands were all very much alive. I started on 40m by hunting and pecking my way up and down the band. After half an hour there were a bunch of VKs and a couple of ZLs in the log. Then to 15m for a couple of JAs then 20m for more JAs and a US station. My 5 Watts was cutting through though not to every caller – some of them completely ignored me. Then to 160m and even though it was still early, 2 contacts were made and then to the 80m DX window for 2 more including a ZL. Back to 40m and it was definitely the busiest band and some new stations were calling. Continued to cycle through the bands calling all I could hear that i hadn’t already worked. Occasionally I would put out some CQ calls and was sometimes rewarded with a call.

After a few hours it started to cool down quite a bit and the wind was a little cool. It was time for more shelter so I started to set up the tent. I had a new “mosquito” tent so had not put it together before. The instructions consisted of a series of numbered pictures printed on a tag attached to the tent bag. By a process of trial and error the tent was set up in about 15 minutes then the radio gear was moved inside. I could continue contesting in more comfort though I was squatting instead of sitting. I managed to work Indonesia, PNG and more US stations. VK2IM who lives nearby was worked too. His signal was so strong on 20m that the KX3 automatically switched off its preamp as a protective measure. Later it was found that he was line of sight and only 6.5km away running a linear amp and a beam. It normally takes a very strong local signal for the radio to react in this way – impressive!

Two antennas at sunrise in Wyrrabalong NP

Two antennas at sunrise in Wyrrabalong NP

Some more hours of contesting and contacts had slowed down to a snail’s pace. After an hour making no contacts I decided at 1am to close down for the night. A trip to the car was made to recharge one of the 4200 mAh LiFe batteries that had been powering the computer after its own internal battery went flat after 4 or 5 hours. The radio was still running fine on its battery of the same capacity and did not need charging. Only one battery can be charged at a time. Returned to the tent for some much needed sleep.


Arose just before dawn, took some photos and retrieved the battery from the car. By 6am I was back on the radio though with the changeover to daylight savings time, this was now known as 7am. 40m was running well and I made many contacts. After 2 hours I tried 10m and 15m and made a few DX contacts with Japan, Indonesia and Russia. This was great because contacts had now been made on all the bands available in the contest. From 10:30am to 11:30am there was a spate of SOTA activations, all on 40m. Some were CW so were not logged as contest contacts and instead recorded in the regular portable logbook. At midday the KX3 was shutting down when PTT was pressed. It was time for a run to the car to charge the battery powering the radio which had dropped to 8 volts. It looked to be bulging a bit too – oops. The charger accepted the battery and started to charge it without complaining about the voltage.

Shack inside the operating tent in Wyrrabalong NP

Shack inside the operating tent in Wyrrabalong NP


The break gave me an excuse to have something to eat as breakfast had pretty much been skipped. Returned to the airways at 12:45pm and set up the voice keyer on the radio to put out calls while munching away. I started to call on 7.144 which is a popular frequency for World Wide Flora and Fauna activations. There were some responses but not from the usual VKFF hunters and I could not self-spot under the contest rules. 40m and to a lesser extent 20m were the bands I was able to make contacts during the afternoon. Occasionally another SOTA station would come up and I would chase them. The most notable was Takeshi JS1UEH on 15m CW.

The weather got quite hot in the afternoon and peaked at 34 degrees in the shade. I was glad to have the tent for protection from the sun. The wind kicked up too and was nearly at the point of blowing things away like the chair sitting outside the tent. During the afternoon I noticed that the UTC time and time to contest end was advanced by one hour. The clock on the computer was showing the correct daylight savings time. I decided to continue on and fix it up later. At about 5pm the long path to EU opened on 20m and many contacts were made. This dried up by 6pm and it was back to 40m. At 6pm the logger reported end of contest, but there was still an hour to go. I set the clock on the computer back by an hour and this fixed the problem. With only one hour left and darkness approaching I started to pack up and just left the voice keyer calling on 40m. The 160m antenna was pulled down first as it would not been needed at all and would take some time to roll up. Responses to calls were very infrequent by 6:30pm so the main activity was packing up the tent. QRT happened at 6:45pm, 15 minutes before the contest end and it took another 20 minutes to collect everything and transport it to the car over multiple trips. The timing worked out well with sunset at 7pm, the same as the contest end time and no need to use lights.

Path to local station VK2IM

Path to local station VK2IM

Log Processing

After the contest the log needed to be massaged and submitted. Entries in the log after the changeover to daylight savings had to be manually edited to take off an hour except for the last few contacts after 6pm (0700z). There was no easy way to do this other than manually. The author was contacted and could not shed any light on why the UTC time was incorrect after the switch to AEDST. Cabrillo format can be generated by the software and directly emailed to the contest manager. ADI format can be generated as well and after some editing to include National Park information, callsigns, locator, etc, the log can be imported into my station log running in Log4OM. When logging I always put in the exact frequency in the comment field. This must be extracted and put into the frequency field, and any SOTA or WWFF reference must be extracted from the comment field and new fields created for those. After importing the contest log, the non-contest QSOs can be added manually in Log4OM. Then the log is exported in ADI format for submission to WWFF to claim the national park activation. SOTA chaser contacts are also exported in CSV format and submitted to the SOTA database. There is also upload to eQSL as well, and it is all handled through Log4OM.

Contest contact and multiplier accumulation over time

Contest contact and multiplier accumulation over time


The chart on the right shows for each hour the number of contacts made in red and the number of multipliers made in green. Contest contacts made per band are summarised below:

Band   QSOs Mult  Pts  Inv 
160 m    6    3   120   0 
 80 m   12    7   120   0 
 40 m   92   15   460   0 
 20 m   36   31    35   1 
 15 m   13   12    26   0 
 10 m    6    4    18   0 
 QSOs/Multiplier:   2.3


At the end of the contest I had logged 165 stations plus another 15 non-contest stations (5 CW). I had worked 3 other national parks and 23 SOTA stations. All this using 5W except for the JS1UEH on 15m using 10W. Contacts were made on all 6 bands from 160m to 10m. Local station VK2IM was worked on 5 bands – all but 160m.

As a QRP station I found making contacts to be a very active process of chasing up and down the bands looking for callers and also switching bands regularly. Its not enough to just call away on one frequency and continuously log contacts like the high power stations do. I found myself calling CQ only a small percentage of the time. Often a higher powered deaf station would take over the frequency so one would be forced to QSY. However, this can happen regardless of output power.

It’ll be interesting to see how my contest score compares to other QRP stations.

Thanks to all contest stations and hunters. Great to get you in the log!


Map of contacts made from Wyrrabalong NP VKFF-0550


  • Elecraft KX3 transceiver
  • Computer headset/microphone
  • Two LiFePO4 4200 mAh batteries
  • 7200 mAh SLA battery
  • Hi-Mound MK-706 CW paddle
  • Lenovo S10-3 netbook computer
  • VK Contest Log (VKCL) v3.12a software
  • ZS6BKW inverted-Vee doublet (28m long) on 9m mast
  • Double size ZS6BKW inverted-Vee doublet (56m long) on 9m travel mast
  • Headlamp
  • Turnigy Accucell 6 charger

3 thoughts on “Oceania DX Phone Contest – Wyrrabalong NP 3-4 Oct 2015

  1. Hi Gerard,

    Interesting read and a great effort. Sorry to hear about the issues with the battery but that looks like it all sorted itself out.

    Best 73 and ’44’,



  2. Pingback: Oceania DX CW Contest – Brisbane Water NP 10-11 Oct 2015 | VK2IO

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