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Acorn II – Buildathon instructions
28 September 2015 | by 
For those who have not seen the Arcorn II SDR kit, you can now purchase the complete kit for just £29.95 from www.kanga-products.co.uk The kit is an excellent entry into SDR receivers and we will be featuring this kit as a a part of the 2015 buildathon at the RSGB convention.
To aide the construction, I have created a set of instructions that may help with anyone who is building this little kit. You can download the PDF here, There are significantly more pages than the Kanga instructions, but for a group construction project we find that lots of space and easy to follow instructions are a great help.
And if you haven’t seen the construction video – here it is again.
Dan Trudgian, MØTGN, is a regular contributor to AmateurRadio.com and writes from Wiltshire, England. He's a radio nut, IT guru, general good guy and an all round good egg. Contact him him here.
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Acorn II – Buildathon instructions
For those who have not seen the Arcorn II SDR kit, you can now purchase the complete kit for just £29.95 from www.kanga-products.co.uk The kit is an excellent entry into SDR receivers and we will be featuring this kit as a a part of the 2015 buildathon at the RSGB convention.
To aide the construction, I have created a set of instructions that may help with anyone who is building this little kit. You can download the PDF here, There are significantly more pages than the Kanga instructions, but for a group construction project we find that lots of space and easy to follow instructions are a great help.
And if you haven’t seen the construction video – here it is again.
Dan Trudgian, MØTGN, is a regular contributor to AmateurRadio.com and writes from Wiltshire, England. He's a radio nut, IT guru, general good guy and an all round good egg. Contact him him here.
» Leave a Comment (0)
Texas QSO Party Fun
I spent a few hours, yesterday and today, playing in the Texas QSO Party. As annual QSO Parties go, this one must be one of the best. With Texas being such a large state, there seemed to be a correspondingly large amount of activity. As well, Texas is a nice single-hop from here on HF and most signals, even from the numerous mobiles, were loud.
I entered in the low-power, single- operator, CW-only class and without spending huge amounts of time, ended up with 185 contacts in 117 counties. There was a very active fleet of mobile operators as well, moving from county to county and sometimes setting-up on county borderlines to provide two, three or even four counties at a time. Thanks to the dedicated mobilers ... you fellows really add a lot of interest to the contest.
Mobile stations also provide extra 'bonus' points, with 500 additional points gained each time you work the same mobile in 5 different counties. Two of them were worked in more than 15 counties, while five were worked in 10 counties. Two were worked in 9 counties, missing the extra thousand points by one more from each.
My weekly QSO Part activity has been a good way for me to ease back into contesting and an aid in improving my ear-brain-keyboarding skills ... it's been helping a lot. One area that doesn't get a lot of practice is in the 'run' mode, since most of these QSO party contacts are in the 'search and pounce' (S&P) mode. Hopefully something will come up soon where I can get more 'run' practice as this requires a higher level of alertness compared with S&P. In reality, either mode is a great way to keep your CW skills honed.
The old laptop, running Windows XP, continues to work well as does the N1MM logging software driven by the K1EL USB keying interface. Further scrubbing of the laptop's unneeded files and start-up programs has sped boot-time to about 90 seconds. Quite an improvement over the eight minutes it was taking before tackling the cleanup!
If you are interested in getting started in contest work, or getting back into it, the WA7BNM Contest Calendar is probably the best source of information ... descriptions of all of the major contests (and some not so major), as well as links to contest-sponsor pages, may be found there. As well, the same site provides the '3830' board, a place where contesters can share their claimed score totals and discuss the event immediately following a contest. It's always fun to see how you compare with other submissions in the same category.
Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].
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Ham College 9
Ham College episode 9 is now available for download.
In episode 9 we discuss the different types of resistors and potentiometers. Deciphering the resistor color code. More questions and answers from the Technical class question pool. Learn how you can win an Icom T-shirt and cap.
1:05:30
George Thomas, W5JDX, is co-host of AmateurLogic.TV, an original amateur radio video program hosted by George Thomas (W5JDX), Tommy Martin (N5ZNO), Peter Berrett (VK3PB), and Emile Diodene (KE5QKR). Contact him at [email protected].
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Hamfest HAB Flight – Mission Debrief
The National Hamfest high altitude balloon flew on Saturday and Pinky Pig reached a maximum altitude of nearly 26km (25,927m / 96,873 feet) as pictured above.
The flight originally planned for Friday had to be postponed due to wind direction and restrictions but I had sort approval for both days and was able to fly on Saturday. The conditions were perfect on launch day, clear blue sky with little cloud and almost no wind. Flight prediction put it landing around 25km away.
Both payload trackers worked flawlessly, PINKY the high speed RTTY successfully sent SSDV as well as telemetry and the backup tracker PIGLET sent the slow speed RTTY telemetry. Trackers from all over the UK as well as France, Holland and Poland received data and uploaded data to the UKHAS website.
The received SSDV images can be seen at http://ssdv.habhub.org/PINKY
The flight path can be seen below
The flight can be seen visualised in Google Earth below and while the 26km altitude was impressive it was around 4km less than I'd planned.
The launch certainly created a great deal of interest at the Hamfest, on the Friday we setup the club tent for South Kesteven ARS with a tracking station and demonstrated the payloads to interested visitors. Stewart (M0SDM) used his Land Rover with a push up mast for a pair of collinear X-50s so we could receive and decode. The mast and the Land Rover generated just as much interest.
On the Saturday I was assisted by my brother David (M6GTD) and just before noon began filling the balloon watched by a large crowd, as can be seen on Dave's (M0TAZ) blog http://m0taz.co.uk/2015/09/national-hamfest-2015/
 |
| Picture by Dave M0TAZ |
Once filled to give the correct lift I sealed it off and checked everything was working then without a breath of wind slowly let the balloon rise, taking the weight of the payloads and once I was sure there were no aircraft flying nearby I let her go. The sky was clear and the balloon went up near vertically and could be seen for quite a long time as it ascended. Representatives of the RSGB and RadCom were in attendance to take photos and did a quick interview.
The tracking station was then full of people as the telemetry and pictures started to be received. It was great to see the huge interest in the balloon.
As the balloon started to near the planned maximum altitude I began to get ready to set off to recover it then suddenly I was told it had burst sooner than expected. I got a hurry up at which point the laptop and mobile connection decided to stop working! However I knew where to head off with my poor brother trying to sort it out as I drove.
Stewart telephoned and gave me directions of where the live prediction and tracking had put the landing spot. My wife also set off from home to come and assist. In the car we were receiving a signal but were struggling to decode and couldn't get on the internet to check the tracking.
I eventually pulled up near the landing zone, while trying to decode the weak signal another car pulled up with two radio amateurs who had been tracking the balloon. I was a little preoccupied and they eventually said they were off and wished us luck. I then realised we were the wrong side of the hill and turned around and drove up to the top and the signal strength increased.
Stewart had phoned to tell me to find the Viking way footpath, as we reached ground zero we saw the other amateurs car and they were setting off down the footpath! It was my flight I wanted to be the first to find it!
My wife then pulled up and was about to set off after them! Then I started getting successful decodes! With the new landing position in the GPS my wife raced off in hot pursuit as I sorted out the car and then followed her with my brother. It was a reasonable walk of around 800m and as we got near it became apparent the other team had been using the online tracker and had only got the last received position which had been sent from around 254m altitude. However the payload was still transmitting strongly and we were decoding it and it was reporting it was in fact at 115m altitude - they were therefore several hundred meters in the wrong direction.
Our accurate location gave us the edge and a quick hop up a bank into a stubble field and a 200m jog my brother spotted the parachute... we had found Pinky and Piglet and got there first!
I was surprised to find most of the balloon still attached, it hadn't so much burst as split in a single tear
The payloads had no damage, other than the antenna being bent by the landing
PIGLET had landed as planned and tested, I had put the battery pack at the top of the box the top heavy center of gravity causing it to roll on landing so the antenna would be upright. It was in a perfect orientation hence the strong signal.
The other chase team turned up and congratulated us then left... my apologies but I was in my own little happy place to be sociable. We then then had the obligatory team photograph before setting back to the Hamfest.
It has been an excellent experience and adventure. The pictures are better than I could have hoped for! Thanks to my understanding wife, my brother David and Stewart for setting up the antennas for the tracking station and manning it on his own while we went off to recover the payload.
Thanks to the organisers of the National Hamfest and Graham Boor (G8NWC) for asking me to do the flight and helping fund the venture and I hope it succeeded in publicising the event and the hobby.
I have now downloaded all the photographs from the onboard camera and they can been in my Flickr album at https://www.flickr.com/photos/nerdsville/sets/72157658732989849
Updated - I realised I didn't put the actual landing position on this post, so here it is
Andrew Garratt, MØNRD, is a regular contributor to AmateurRadio.com and writes from East Midlands, England. Contact him at [email protected].
» Leave a Comment (0)
Hamfest HAB Flight – Mission Debrief
The National Hamfest high altitude balloon flew on Saturday and Pinky Pig reached a maximum altitude of nearly 26km (25,927m / 96,873 feet) as pictured above.
The flight originally planned for Friday had to be postponed due to wind direction and restrictions but I had sort approval for both days and was able to fly on Saturday. The conditions were perfect on launch day, clear blue sky with little cloud and almost no wind. Flight prediction put it landing around 25km away.
Both payload trackers worked flawlessly, PINKY the high speed RTTY successfully sent SSDV as well as telemetry and the backup tracker PIGLET sent the slow speed RTTY telemetry. Trackers from all over the UK as well as France, Holland and Poland received data and uploaded data to the UKHAS website.
The received SSDV images can be seen at http://ssdv.habhub.org/PINKY
The flight path can be seen below
The flight can be seen visualised in Google Earth below and while the 26km altitude was impressive it was around 4km less than I'd planned.
The launch certainly created a great deal of interest at the Hamfest, on the Friday we setup the club tent for South Kesteven ARS with a tracking station and demonstrated the payloads to interested visitors. Stewart (M0SDM) used his Land Rover with a push up mast for a pair of collinear X-50s so we could receive and decode. The mast and the Land Rover generated just as much interest.
On the Saturday I was assisted by my brother David (M6GTD) and just before noon began filling the balloon watched by a large crowd, as can be seen on Dave's (M0TAZ) blog http://m0taz.co.uk/2015/09/national-hamfest-2015/
|
| Picture by Dave M0TAZ |
Once filled to give the correct lift I sealed it off and checked everything was working then without a breath of wind slowly let the balloon rise, taking the weight of the payloads and once I was sure there were no aircraft flying nearby I let her go. The sky was clear and the balloon went up near vertically and could be seen for quite a long time as it ascended. Representatives of the RSGB and RadCom were in attendance to take photos and did a quick interview.
The tracking station was then full of people as the telemetry and pictures started to be received. It was great to see the huge interest in the balloon.
As the balloon started to near the planned maximum altitude I began to get ready to set off to recover it then suddenly I was told it had burst sooner than expected. I got a hurry up at which point the laptop and mobile connection decided to stop working! However I knew where to head off with my poor brother trying to sort it out as I drove.
Stewart telephoned and gave me directions of where the live prediction and tracking had put the landing spot. My wife also set off from home to come and assist. In the car we were receiving a signal but were struggling to decode and couldn't get on the internet to check the tracking.
I eventually pulled up near the landing zone, while trying to decode the weak signal another car pulled up with two radio amateurs who had been tracking the balloon. I was a little preoccupied and they eventually said they were off and wished us luck. I then realised we were the wrong side of the hill and turned around and drove up to the top and the signal strength increased.
Stewart had phoned to tell me to find the Viking way footpath, as we reached ground zero we saw the other amateurs car and they were setting off down the footpath! It was my flight I wanted to be the first to find it!
My wife then pulled up and was about to set off after them! Then I started getting successful decodes! With the new landing position in the GPS my wife raced off in hot pursuit as I sorted out the car and then followed her with my brother. It was a reasonable walk of around 800m and as we got near it became apparent the other team had been using the online tracker and had only got the last received position which had been sent from around 254m altitude. However the payload was still transmitting strongly and we were decoding it and it was reporting it was in fact at 115m altitude - they were therefore several hundred meters in the wrong direction.
Our accurate location gave us the edge and a quick hop up a bank into a stubble field and a 200m jog my brother spotted the parachute... we had found Pinky and Piglet and got there first!
I was surprised to find most of the balloon still attached, it hadn't so much burst as split in a single tear
The payloads had no damage, other than the antenna being bent by the landing
PIGLET had landed as planned and tested, I had put the battery pack at the top of the box the top heavy center of gravity causing it to roll on landing so the antenna would be upright. It was in a perfect orientation hence the strong signal.
The other chase team turned up and congratulated us then left... my apologies but I was in my own little happy place to be sociable. We then then had the obligatory team photograph before setting back to the Hamfest.
It has been an excellent experience and adventure. The pictures are better than I could have hoped for! Thanks to my understanding wife, my brother David and Stewart for setting up the antennas for the tracking station and manning it on his own while we went off to recover the payload.
Thanks to the organisers of the National Hamfest and Graham Boor (G8NWC) for asking me to do the flight and helping fund the venture and I hope it succeeded in publicising the event and the hobby.
I have now downloaded all the photographs from the onboard camera and they can been in my Flickr album at https://www.flickr.com/photos/nerdsville/sets/72157658732989849
Updated - I realised I didn't put the actual landing position on this post, so here it is
Andrew Garratt, MØNRD, is a regular contributor to AmateurRadio.com and writes from East Midlands, England. Contact him at [email protected].
» Leave a Comment (0)
SX-2000 HF (to 4m) QRP transceiver and SunSDR-MB1
This was news to me. I have never seen this before although the post on the website below was earlier this summer. It looks like a poor man’s IC7300 and covers the same range but at QRP power levels. It is an Italian transceiver. Personally I prefer the ICOM. I have no idea about price. It looks like a “back shed job” to me.
See http://www.cqdx.ru/ham/qro-qrp/qrp-hf-transceiver-with-touch-screen/ .
On the same website are details of the Sun SDR-MB1 assembled prototype, which is another rig I have never heard about! There is a video of this at https://youtu.be/SIfvVUw0774 . This rig looks more professional and the YouTube link quotes a price of $5500. This was 3 months ago.
Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.
» Leave a Comment (0)
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