WIA Sunday Broadcast – VK5ARG FreeDV Relay on 7177kHz

wia-logo-image_1_hiresThe AREG (VK5ARG) is conducting an experimental re-transmissions of the National and VK5 WIA News Service in the FreeDV-1600 mode.

The aim is to encourage amateur radio operators to come and try FreeDV HF Digital voice.

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If you have FreeDV set up with your HF station why not tune in and see how you go? You can use one of the many open source software packages or perhaps using an SM1000 FreeDV modem to receive (and transmit FreeDV. You can visit the AREG HF Digital Voice project page for more information as well!

Callbacks are conducted after the broadcast tiki-download_fileproviding an ideal opportunity for you to experiment further with FreeDV!

You can also log your FreeDV WIA Broadcast reception report here:

For more information about FreeDV please visit the www.freedv.org website or log onto Internet Relay Chat (IRC) on irc.freenode.net. (http://webchat.freenode.net/?channels=freedv) and connect to the #freedv channel.


Update: 17th January 2016 Activity

Following on from the broadcast reports were coming in from around the country. Some could decode it successfully, some couldnt. As this is an experiment, we are interested in all results. The following are some of the feedback received:

Michael VK5ZEA in Port Lincoln (~230km away) posted these samples:

Andrew Scott VK3BA in Melbourne (~700km away) posted this sample:

Thanks to Andrew and Michael for posting samples of what they received online!

VK5ARG at the Summer VHF/UHF Field Day 2016

The WIA Summer VHF/UHF field day is about encouraging amateur radio operators to get out in the field to make contact with as many stations as possible over the greatest distance possible on all amateur frequencies above 50MHz. This makes it a very diverse and interesting contest as you have a variety of stations participating, including:

  • home stations operating any or all VHF / UHF and Microwave bands
  • portable stations running stations on bands between 50-1296MHz
  • portable stations specializing in microwave (usually bands between 1296-10368MHz) usually operating distant mountain tops.
  • roving stations which change location constantly throughout the contest

Distances are calculated using the Maidenhead grid locator system and contest contacts consist of exchanging signal strength, a contact sequence number and which grid square you are operating from.

This year, the AREG decided to mount a portable station using the Club call-sign, VK5ARG, which operated in the 8 hour division.

DSC_6422-web Bob, VK5FO and Ray, VK5RR arrived onsite just after 10am and after meeting Paul from the Salvation Army commenced the set-up of the station.  Andy VK5AKH arrived and assisted with the station set-up.

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Ray VK5RR and Bob VK5FO setting up

The station was very similar to the Team DSC_6427-webVK5FI station that Bob and Ray set up for the Spring Field Day, with the addition of 23cm.

A few small changes were made to the station from the lessons learnt during the Spring FD – and that was ensuring that each band had a dedicated logging laptop and adding some headphones!

The addition of the club marquee was most welcome with temperatures in the mid 30’s – we were able to operate in relative comfort!

The station was set-up and ready to go a few minutes to go before the start time of the contest.

During the course of the day we had a few visitors drop in to take a look at the station, and Ben VK5BB, popped in for an hour or so and operated the 6m station for part of his time.

Everyone present had a great time, and the highlight of the day was Bob VK5FO making a few DX contacts on 6m – working 3x ZL stations an a VK4 station.

At the end of the 8 hours, the station was pulled down and packed up in about 45 minutes.

We would like to extend a special thank you to the Salvation Army Wynn Vale for allowing AREG access to their land behind the Hall.  The site proved to be quite good for this type of station with excellent take-off in all directions for VHF and UHF.

Photo Gallery from the Day!

AREG Members Roving during the Contest too!

While the club members were having fun manning the station in Adelaide, Matt VK5ZM and Grant VK5GR took a different slant on the contest and entered the Roving section operating as VK5GR.

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VK5GR operating from Port Giles next to the silos

They started out the day by driving to Port Giles  on Yorke Peninsula. This was significant as it allowed them to activate major grid square PF84. 6m was the surprise here working VK7DD on 52.525 FM. Good contacts were also had with many Adelaide stations on 144 and 432MHz.

After about an hour they packed up and hit the road, contesting along the way. At each new 6 letter grid they came to they stopped for 5-10 minutes and made a set of contacts on both 2m and 70cm using just the mobile antennas on the car. The tropospheric ducting was strong across the gulf as all of the signals were S9++ – not bad for an average 70-100km path!

After Port Vincent it was decided that things needed to be sped up a little or the objective of at least 4 major grid squares in 8 hours wasnt going to be met. So they started contesting while mobile on the highway (at 100kph). This proved challenging as they now were working a new grid square about every 3-4 minutes! Usually there was time for 2-3 contacts per square on one or two bands before they had to stop, update their locator in the logging software and go again. They kept this routine up for about 8 squares before reaching the slag heap lookout at Ardrossan.

At Ardrossan they came across Tim M8Qe6el-smallVK5ZT who was participating in the microwave section of the contest. It was great to see the microwave guys in full swing! Matt and Grant then also broke out the 6m antenna and  gave some calls on both 50.2 SSB and 52.525 FM so that they could claim 6m for grid square PF85.

As time was then running short, they then decided to drop an attempt to work from PF86 (which was going to be a very difficult path to Adelaide) and instead focus on distance contacts from the northern edge of PF95 and southern edge of PF96. To do this they headed for Kulpara, where they also found Iain VK5ZD operating also in the microwave section. Some more 2m and 70cm contacts were had just from the mobile whips on the car (but with the advantage of ~200m elevation on top of the Hummocks range) before then packing up and heading for their last site of the day on Middle Range Hill near Nantawarra. This allowed them to activate grid square PF96ca.

Here they broke out the big guns and put up the 2m beam. A couple of contacts were made on SSB including to Port Pirie and the Riverland, plus multiple contacts back down into Adelaide. 6m and 70cm were also activated, with every contact on average exceeding 120-140km. Finally they dropped back into PF95cx for a 20 minute closing flurry before the 8 hours was up.

Conclusion

Everyone in the club who participated had a great day, be it on the road, operating from home or portable in Wynn Vale. It has certainly stirred up some enthusiasm so look out for VK5ARG operating in the Winter Field day in 2016! To hear more about the activities over the weekend come along to the club on Friday the 15th of January!

Summer VHF/UHF Field Day 2016

Bob, VK5FO and Ray, VK5RR will lead a Portable field day station running as VK5ARG for the Summer VHF/UHF field day on Saturday 9th January/

The Plan is to set up and run a portable 3 band station from Wynn Vale for the First 8 hours of the Contest, and will be onsite and setting up from around 10am

We will be setting up the station on the grassed area behind the Wynn Vale Salvation Army Hall (with permission) near the Corner of Endeavour Drive and Wynn Vale Drive, with Plenty of parking available.

This site is a reasonable VHF/UHF site with an elevation of around 200m and excellent take-off with minimal obstructions providing  great coverage of the whole Adelaide Metro area (and beyond) whilst allowing easy access for visitors.

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AREG members and other interested Amateurs who would like to take a look at a field day station are invited to come along and take a look, jump in and operate one of the stations that will be set up for some of the contest.

The Spring field day was a lot of fun and we are setting up this station to do it all again and hopefully encourage a few more people to get out and participate. If you are not planning on setting up your own Station for the Field day, or think it is too hard, then come along, see how we set up, and do a see how easy it is to participate  and join in the fun.

The station for the filed day will be substantially the same as what Bob and Ray set up for the spring field day, using a trailer to support the poles for the Antennas.

  • The 6M station will be either an IC 706 or a KX3 and HR-50 Amplifier.and a 2 Element Beam
  • The 2M station will be an IC-7100 for SSB with a 6 Element Yagi and an FT-2800M into a Slim Jim on FM.
  • The 70cm Station will be a TS-2000 into a 17 Element Yagi.

Each station will run a Laptop for logging and the whole lot will be powered via a generator and a 160aH Battery.

Come along, say hello and join in!

PicoHorus Launch and Recovery!

PicoHorus “N+2” was launched at 11AM CDT on Saturday the 2nd of Jan 2016. The payload consisted of a light telemetry beacon, weighing in at 45 grams including batteries. A small latex balloon was used, deliberately under-filled in an attempt to achieve a ‘float’ condition at approximately 30km altitude.

The payload was launched near Mt Barker in the Adelaide Hills, from a fairly windy hill:

The wind, combined with the very small amount of balloon neck lift resulted in the balloon not rising at all for a few minutes! Eventually the balloon rose above the higher ground winds, and continued on upwards at the desired ascent rate of 1m/s.

The telemetry beacon transmitted the ‘standard’ RTTY telemetry as well as an experimental binary FSK mode developed by David Rowe. The binary telemetry was transmitted between the RTTY telemetry frames, and proved to be far more reliable than the RTTY telemetry, especially in low SNR conditions(more to come on this!). Unfortunately the demodulator for the binary telemetry is not quite in a ‘user friendly’ state yet, and so it was only used by a small number of listeners, with the rest using the dl-fldigi software. Special thanks to Joe VK5EI and Ivan VK5HS for tracking the RTTY payload through the majority of the flight!

PicoHorus N+2 Flight Profile

PicoHorus N+2 Flight Profile

The balloon proceeded to head east to the Victorian border while slowly ascending to a maximum altitude of 28376m. After floating for approximately 20 minutes, the balloon burst, sending the payload plummeting to the ground at 15m/s. The balloon was tracked down to 3.3km altitude by Ivan, from his home QTH near Renmark. The final position placed the balloon about 25km north-west of Pinaroo, SA, approximately 200km east of the launch site.

PicoHorus N+2 Landing Area

PicoHorus N+2 Landing Area

Recovery

This payload wasn’t originally intended to be recovered, but given the landing location looked reasonable for a recovery, Andy VK5AKH and Mark VK5QI decided a Sunday drive was in order to see if the payload was still operational.

Leaving Adelaide at around 8:30am, they arrived at the expected landing site around 11:30am to find the payload still transmitting strongly, and reporting a position just 50m away from a road. A short walk into a field had the payload in hand!

Thanks again to everyone that helped out decoding telemetry, without your input we would have not been able to recover the payload.

Our next balloon launch is scheduled for late January – stay tuned!

73s, Mark VK5QI

Project Horus Pico Launch – 2nd January

PicoHorus PayloadsThis Saturday (2nd Jan 2016) at around 11AM, Mark VK5QI and David Rowe VK5DGR will be launching a “Pico” (sub-50g) balloon payload, with the aim of testing a new Binary FSK telemetry mode. This is intended to be the next evolution of the Project Horus 70cm RTTY down-link and should result in more reliable telemetry, but without the slow update-rate penalty of data modes like Olivia or JT65

The binary telemetry modem is still under development, and the de-modulator currently only exists as a collection of Octave and Python scripts. However, the payload will still be transmitting the ‘classic’ RTTY telemetry on 434.650MHz, along with binary telemetry on the same frequency. A guide to tracking using dl-fldigi is available here.

The launch is intended to have a very slow ascent rate (~1m/s), with the intent of causing the balloon to float at around 15-20km altitude. However, the balloon is of fairly old stock and may burst early. If a float does occur, the flight path should track towards Victoria.

As always, listeners are much appreciated, especially as we won’t be chasing this flight. The flight will be trackable on the day at: http://tracker.habhub.org/

73s, Mark VK5QI

Project Horus News: HorusLoRA test flight success

Mark VK5QI in conjunction with David VK5DGR undertook the Horus telemetry test flight today and were met with roaring success. Here is a short photo blog of the day’s events.


100g Totex Ceiling balloon, approx 500g of neck lift.

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Launch!

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Cutdown payload just below the balloon (cutdown capsule just above the cutdown payload, though it’s not really visible in this picture). Below that is the parachute, and far below that is the RTTY payload.


Tracking from Pt Lincoln!

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Joel Stanley (VK5FJMS) was tracking from Winters Hill in Pt Lincoln, and was able to ‘ping’ the payload using a fairly modest antenna setup.


Horus Messenger!

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Screenshot of the ‘Horus Messenger’ software in operation. This allows us to transmit text messages from the LoRa ‘ground stations’, which are then digi-peated by the balloon payload. You can see a brief chat between myself and Joel.


Cutdown time!

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Do I really really want to cutdown? Yes, yes I do!


Landing Site Map

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(With us heading back to a road that gets us closer to the landing site)


Landing Site

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Lots of gum trees. The landowners (Alex and a nice lady who’s name I can’t remember) were very nice retired couple, who assisted us in getting to the landing site through a number of sheep-filled paddocks.


Quad-Bike Assist

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One of the landowners driving down to open some gates and disable some electric fences for us.


David (VK5DGR) DFing

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David Rowe doing some direction finding on the RTTY payload. Also sheep.


Recovered!

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The payloads were found hanging from a gum-tree, about 2m above ground level.

Project Horus Launches Planned: 29th Dec & 2nd Jan

IMG_1204Mark VK5QI is planning to launch a couple of ‘medium’ altitude balloons this week as test flights of a new LoRa based flight termination controller. The first is tomorrow Tuesday (29th), and one possibly on Saturday (2nd Jan). Both will be launched from the Mt Barker High School Oval, and will only have a maximum altitude of 15km or so.

Testing new Command Systems

The primary aims for these launches are:

  • Test the LoRa RF link.
  • Test some new uplink & message-digi-peating features of the payload.
  • Test a new cut-down mechanism (something with a little more ‘bang’ than before.

LoRa payloads have flown on the last few Horus launches, as a lead up to the retirement of the current ‘Osiris’ cutdown payload, which uses a now-obsolete FSK modem-on-a-chip. The new LoRa payloads have the potential to provide a more reliable uplink using far less power. The downside is that specialised receiver hardware is required (well, as specialised as a module you can buy on eBay for $10 is) . As such, it’ll only be used on the cutdown payload, where the only people really interested in it are those of us in the chase cars who are trying to recover all the shiny cameras hanging beneath the balloon!

Where to Listen?

Both launches will be at 10:30AM CDT, and will have the following payloads attached:

  • RTTY Telemetry: 434.450MHz, 100 baud 7N2 (Use dl-fldigi to decode this as usual)
  • LoRa Payload: 431.650MHz, 125KHz bandwidth, 4/8 Coding Rate, SF10

As always, trackers are appreciated. The flights will be able to monitored via www.habhub.org

HorusLora Track Prediction

Breaking News: WIA News FreeDV Experiment Sunday 6th Dec

To continue promotion of the FreeDV mode, the AREG this coming Sunday is planning to attempt a relay of thethe WIA news using the FreeDV 1600 mode on 40m. The operating frequency will be around 7.177 from 9am CDST (2230UTC) with a FreeDV 1600 net Planed around 9:30am (2300UTC). A FreeDV 700B net will follow after the 1600 mode one.

Andy VK5AKH will be transmitting the WIA Broadcast and acting as net control. He will monitor the FreeDV QSO finder, IRC etc for feedback during the broadcast. If the worst case arises and we can’t get the Broadcast working there will still be an on air gathering at 2300UTC of FreeDV stations.

Andy runs a rotary dipole and would expect that 50W of freeDV should reach most of SE Australia fairly well at this time of the day, so tune in and have a go!