Preparation:

My closest summit is Berndorfer Buchet and as I needed a summit I know to test my latest build of the 2-element HF wire beam, this one pointer was ideal as I had not yet activated it in 2024.

This was the first dry day in about a week and as more rain was expected later in the week, this was to be a quick activation. Just enough time to set up the beam, test it on the analyser and bag a few contacts ideally on 20 and 10 metres.

A relatively late activation was planned, to arrive at the summit by 9 am local (0700 UTC) but despite this the complete station fitted into/onto my 40L backpack would be loaded into the car, Monday evening, the night before to allow an easy departure the next morning.

The Activation

DL/HBY-064 / DL/AM-180 Berndorfer Buchet

As normal I woke 30 minutes before my alarm went off and was all packed and out of the door at 7:30 am as planned for a 9 am (0700 UTC) start. I had hoped to fill the car at a garage on the way but there were so many queued that I decided to leave it for the return journey.

Although sunny, it was still cool. Walking from the parking spot to the open area 15m below the summit, the track was muddy and I hoped that the small area where I intended to set up was not as much of a bog as it was the last time I used it.

Although soft underfoot, the ground had dried enough from the last few days of rain to be usable. After putting down my painter’s sheet, I proceeded to unpack everything from the rucksack. A more complex operation than normal with the HF beam antenna rather than just a dipole or loaded vertical.  Once the mast and antenna were up and the elements/guy ropes positioned, my first task was to run my RigExpert antenna analyser on the beam with it switched to each of its four directions, as while, I had only moved the complete feedpoint electronics from a flat board into a box, there are several things that could have gone wrong. I had done DC connectivity checking but this was the first chance to test the antenna completely.

The first trace (see photos) for the beam on 20 metres (it covers 20 & 10m) with it pointed West, was a little strange with two dips shown. These were OK if a little strange. I then pressed the key fob to turn the antenna to the North and ran another scan – see next photo – this was all over the place. It was worse still when I wanted to clear the trace and try again, the RigExpert analyser would not let me. I tried turning it off – nothing! the trace stayed. Unplugged the coax, no change, so there was nothing for it, but to take the back off and remove the batteries, which I did and I was able to turn the unit on again, but as soon as I tried to take a trace again (this time with the antenna switched back to the known good West direction) the same mess on the screen and the unit had hung up. Luckily I have seen this before – these units don’t like low battery voltage and after once again removing and replacing the batteries, I could see on the startup display that the batteries were low. So, as I had no spare batteries with me I put the analyser away and continued to set up the radio, hoping that the antenna was OK.

Well, the first station in the log was Ernie VK3DET with a 5-5 in both directions, so I guess the antenna was working. Band conditions were all over the place though. Some DX stations (VK4 and Jamaica were booming in while others from Finland were not as strong as usual – with the beam switched north). Ernie reported having just worked some portable stations in the UK with S9+ signals and had expected me to be stronger but 20 metres was in such a mess that in the 10 minutes in between signals had dramatically changed.

After spotting myself on the SOTA cluster I tried calling CQ for 10 minutes on 10 metres with no responders. All I could hear was the local 10m beacon about 25 km to my south – I used this to check the antennas directivity and as before I got 2 S-points less signal off the back and 1 S-point less off the sides. That said, this was not a complete test for the antenna and I will need to plan to go out again and check it with the analyser again, now that it is working fine with some new batteries.

20m had really deep QSB but at least the weather stayed fine long enough for me to complete the activation.  

Photos:

This slideshow requires JavaScript.

Equipment taken:

• Mountaintop travelling 40-litre rucksack.
• Xiegu G90 radio.
• Screw-in sun umbrella base.
• 7 Metre Zita Fibreglass mast.
• Komunica Power HF-Pro2-PLUS-T loaded vertical antenna and tripod (not used)
• Remote switched 2-element wire HF trapped elements beam for 20 & 10m.
• 4 Ah Eremit LifePO4 battery.
• 4 Ah LiHV battery(not used).
• Painter’s thick plastic sheet.
• Gardener’s kneeling pad.
• Electrical hand warmer.
• Suncream.
• Lightweight headphones.
• Smartphone for SOTA spotting.
• RigExpert AA-30 Antenna Analyser. 

Log:

HEMA DL/HBY-064 Berndorfer Buchet

 

SOTA DL/AM-180 Berndorfer Buchet

 

Contacts map

Conclusions:

• You can never predict what will happen. Thankfully the crazy readings from the RigExpert were caused indeed only because of flat batteries.

• The band conditions were disappointing overall compared to activations a couple of weeks earlier.

73 ’til the next summit.