First Australian SOTA and VKFF DMR contact?

After weeks of poor weather in Queensland, Saturday 10th November dawned bright, sunny and hot. This would be the perfect day to head for the hills and make a DMR contact, in simplex, on Talk Group 99 in Time Slot 1.

At first, my plan was to climb to the summit of Mt Beerwah (VK4/SE-057) but on reading a few blogs about the climb and what it entailed, I decided that discretion would certainly be the better part of valour on my part as I am not as young as I’d like to be. Much of the way up is undertaken on all fours, so the bloggers said; I didn’t want to chance becoming a helicopter Medivac casualty. Moving about on all fours isn’t advisable especially if you have gear that includes a rather long and unwieldy ‘squid pole’ to contend with.

So I set my sights a little further up the Sunshine Coast and settled on Mt Coolum (VK4/SE-114). And to make things even better, it falls within the Mt Coolum National Park (VKFF-0344).

My gear for this activation was my Elecraft KX1 (with six internal AA cells) and 24 ft long wire antenna with two counter-poises of 16ft and 32ft respectively. For seating arrangements I took along my Helinox Chair One.

Mt Coolum is the second largest solid rock mountain in Australia; the largest is Uluru (previously known as Ayers Rock) in the Northern Territory. This fact alone made it fitting that I should climb it as I had visited Uluru in July.

The way up to the summit is very steep but the path is excellent, consisting of suitably arranged rocks that act as steps. It is a very popular outdoor venue with the locals and as a result the way up and down is very busy.

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The was a constant stream of people making their way to the summit.

As soon as I arrived at the top I put out a call to Greg, VK4MHC, on DMR simplex with my CS750 hand held radio. He replied and sounded as if he were a few feet away, so strong and clear was the audio. And considering he happened to be at a local resort some 2km away, the quality of the signal was nothing less than astounding.

The simplex calling frequency in Australia is 439.200 MHz.

This I believe is the first time DMR has been used as a mode for SOTA and WWFF in Australia. (Our local VKFF representative in VK4 later told me after I had submitted my log that he was unable to process the DMR QSO as the system wouldn’t accept a Digital Voice call even though it’s listed as an accepted mode. He has progressed the issue further up the line, something that tells me it hasn’t been encountered before.)

We then proceeded to talk on 2m and 70cm FM; I used my Yaesu FT-70D and he used his Yaesu FT-818.

I then looked for a suitable spot out of the way of curious onlookers to set up my HF station. That spot turned out to be right in the middle of a thicket of sharp bushes that I cleared just enough for the chair.

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Keeping out of the sun was the name of the game.

Once my gear was in place, I settled down into my chair and uploaded a spot to SOTA Spotter. Who said the bands were dead? Here’s the list of the stations I worked using only 2W.

VK4JAZ 09/11/2018 22:39 VK4/SE-114 433MHz DV VK4MHC. (First DMR call in VK?)
VK4JAZ 09/11/2018 22:43 VK4/SE-114 144MHz FM VK4MHC
VK4JAZ 09/11/2018 22:44 VK4/SE-114 433MHz FM VK4MHC
VK4JAZ 09/11/2018 23:26 VK4/SE-114 14MHz CW VK7CW
VK4JAZ 09/11/2018 23:30 VK4/SE-114 14MHz CW VK1MCW
VK4JAZ 09/11/2018 23:35 VK4/SE-114 14MHz CW VK3CAT/P
VK4JAZ 09/11/2018 23:37 VK4/SE-114 14MHz CW VK3ARH
VK4JAZ 09/11/2018 23:40 VK4/SE-114 14MHz CW VK3IL/P
VK4JAZ 09/11/2018 23:43 VK4/SE-114 14MHz CW ZL3GA
VK4JAZ 09/11/2018 23:53 VK4/SE-114 7MHz CW VK2IO/P

In addition, VK3CAT, VK3ARH and VK3IL were also summit activations.

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At leas the view was good amongst the prickly shrubs.

 

 

 

 

 

 

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Beating the downturn with the miniHFPA2

Everyone’s been complaining lately about poor propagation when it comes to amateur radio. But I think I have found the answer to my situation, especially considering I run an essentially low power operation.
I ordered a miniHFPA2, a linear amplifier that is made for portable operation out in the field.
This little beauty is the 5th generation HF Packer amplifier that comes pre-assembled, tested and calibrated. All I had to do was to hook it up to my Yaesu FT-817, then feed the output through an SWR/Power meter and Antenna Tuning Unit to my long wire antenna.

All set up and ready to test on air.

I happened to notice, on checking SOTA Spotter, that VK2IO Gerard and VK2/G4OBK Phil would be activating three summits, VK2/IL-001, 002 and 005 on Thursday 8 February 2018.. This would present me with an excellent opportunity to try out the new amplifier.

I tuned up on 40m and responded to their calls. Gerard mentioned that he was receiving me well and gave me a signal report of 569. This was excellent news, given the marginal conditions. I worked all three summits as they were activated and couldn’t have been more pleased. You see, normally my 5W output wouldn’t have been up to it in current conditions.

So what is this little gem of an amp all about?

According to Virgil Stamps, who makes the amps, the aim of his project is to give your signal a boost so you can start making memorable contacts under marginal conditions. It certainly has lived up to that! The amp gives a clean, more powerful output signal from a QRP transceiver with a good balance between output power, physical size and weight. And what’s sure to excite any SOTA or WWFF operator, it can be powered by any battery such as a 7.2 AH gel cell or 4.2 AH LiFePo4 battery. The amplifier provides a full output of around 30-35W with as little as 9V DC, making it very tolerant for outdoor battery operation.

What makes this amp a little different is the heat sink that is secured to the top of the enclosure. It isn’t the more common type that features rows of serious fins; it is a flat metal plate of around 1mm in thickness. And it does the job it is intended to do very well indeed. It lends itself to outdoor use as it can easily be accommodated in any backpack, but care does need to be taken so as not to damage the toggle switches on the front panel.

I particularly like the slim heat sink that is secured to the top of the enclosure.

The amp comes complete with two low pass filter modules (60/40m and 30/20m) but mine came complete with additional ones for 160m, 80/75m, 17/15m, and 12/10m as well. These modules are inserted into place by unscrewing the left and/or right hand side panels of the enclosure. They slip in effortlessly, thanks to cleverly designed guide posts on the LPF boards. I think when I proceed on my next SOTA activation, I will decide beforehand what bands I will be operating on as I think unscrewing side panels in a hostile environment such as on a summit could be a little tricky. Virgil did send along a sealed package containing spare enclosure screws, heat sink compound, two spare MOSFETS and some other items. Great service and attention to detail.

At the time of ordering you need to specify what level of input power you will be using. This could range from 1 to 5W; I chose 5W. Output power is an easy 30W. Spurious products are -40dB or better at 35W, with harmonic content at -45dB or better at 35W.

If you’d like to read up on the specifications, visit the web site http://hfprojects.com

 

VHF Packer 6m Amp alignment

Andrew VK1DA pointed out to me that I had inadvertently set the bias on the amp to 0.5A instead of my intended 0.7A. This meant I had set it up for use on FM instead of SSB.

This was easily corrected; all that was needed was to adjust the variable resister while monitoring the DMM.

Now the bias is set correctly, it’s time to see if it makes any difference to live, on-air operations.

All set for SSB now.

 

Climbing Mt Ngungun in the Glass House Mountains, QLD.

One of the most recognizable mountain groups in Queensland would have to be what is known as the Glass House Mountains. Named by Capt James Cook during his voyage of discovery, these remarkable geological formations are what remains from ancient volcanic activity.

Getting to Mt Ngungun, the northern most mountain in the group, is easy. Drive up the Bruce Highway and turnoff down Steve Irwin Way. Then follow the signs to the Glass House Mountains National Park. You’ll find a good place to park your car at the car park in Fullerton Road.

Plenty of parking available.

The track to the summit is well maintained, with good dirt surfaces and rock steps. It is a Grade 2 track all the way to the top. However, there is a short section where there is a warning to beware of cliff edges.

Signposting is good.

The walk up is interesting, through open forest with fern understory. There is also an interesting rock that features an overhang.

Looks much like a cave.

The walking track is excellent but care needs to be taken in wet weather as the rocks could be slippery.

The going is steep at times.

There are excellent views of the local area to make the journey up even more enjoyable. Photography is a must as there are good close-up views of nearby Mount Tibrogargan, Mount Coonowrin and Mount Beerwah.

There is plenty of space on the summit but little shade. And there are lots of visitors; this is evidently a popular mountain for day excursions.

The small trees and rocks provided me with a good spot to erect my antenna and operate my low-powered radio station while enjoying spectacular views.

The round trip took about 2 hours, not counting time spent on the summit. The walking distance was around 2.8km.

QRP Hours contest

Sunday 22nd October was a good day for QRP in VK-Land. And even thougth HF conditions haven’t been good at all (especially according to some), I had success and a lot of fun by taking part in this short contest run by the CW Operators’ QRP Club Inc.

This year the contest was restricted to the 40m band and consisted of two sections: the first hour CW and the second Phone. I took part in the CW section only.

The rig I used was my trust Elecraft KX1, this time with 12v gel cell power as I didn’t have to worry about weight: I was to operate from the back deck of my home. The antenna was the Buddistick that I attached to the hand railing of the deck by means of my new Buddistick G-clamp. My key was the Pico Paddle. Power output was 3W.

My set up for the contest. All ready to go.

Tuning up the antenna on 40m was not easy. I couldn’t get a match at all with my Hendricks BLT Tuner, so I hauled out my LDG auto tuner, which gave me a 1.9:1 reading, which was the best I got. QRP is all about compromise, so I went with that.

The Buddistick mounted to the railing with my new G-Clamp.

I do think that the proximity of metal guttering didn’t help, but I had to make do with the situation I found myself in. At least there was some good height, facing south – which would be good for VK1 and VK2 contacts.

Nice height even though I needed to angle the whip.

Noise levels were high on the band but nevertheless, I was able to work VK2IG, VJ2GAZ, VK2FGBR, VK1DA, VK2JDR and VK2IO.

Next time I’ll try a long wire antenna.

Windcamp proves its worth in Samford CP activation

Today I activated Samford Conservation Park VKFF-1639 once more in an attempt to secure four contacts to bring my total to ten. It would also be the first time I would use my new Windcamp LiPo battery.
Setting up my long wire antenna was interesting: I needed a heavy tree branch to act as an end support. The far end was supported by my squid pole.

It’s all about improvisation.

At the start of the activation, my internal Windcamp LiPo was putting out 12V which allowed me to operate at a full 5W. By the time I had made four contacts, I had been operating solidly for an hour and seven minutes. The voltage on the display was now reading 11.8V.

I am more than happy with that.

New battery power for my FT-817

I have long wanted/needed to upgrade my battery power for my Yaesu FT-817. The prompt came when the internal battery died. My choice was the kit put out by Windcamp; a 3000mAh internal LiPo battery and new battery compartment lid for the radio that comes fitted with a PCB and charging circuitry that allows the supplied mains charger to charge the battery while inside the radio.

The parcel arrived from China beautifully packed. The battery and the new replacement lid came packaged in very nice plastic cases, which, together with the instructions and charger, all fitted into a compact cardboard box for shipping.

The contents of the parcel.

After extracting the individual components from their packaging, it was time to think about installing the battery into the radio.

It is a tight fit but the components plugged together as intended. Note the PCB on the underside of the new lid.

When the battery and associated wiring was all nice and snugly fitted, I popped the lid closed and got ready to charge the new LiPo battery.

The new lid in place and ready for charging.

The charger has a double-coloured LED to indicate the state of the charge: red for charging and green for a completed charge. The initial charge takes around 5 hours to accomplish.

According to the supplied documentation, the rated voltage of the battery is 11.1V, with the output voltage range stated as between 9 and 12.6V. The maximum output current is 4A.

Now to test it in the field.