AmateurRadio.com

Already a week into September and not long now till the National Hamfest where I and the South Kesteven ARS are launching a high altitude balloon launch subject to CAA approval. The documents have been submitted so just waiting for the nod.

The balloon and parachute have been purchased from Steve Randall (G8KHW) at Random Engineering, using the same size as I did for the Eggsplorer-1

I had joked about sending some "Ham into space" on this flight but following the smelly end to Eggsplorer-1 have opted to play it safe and avoid food! Instead will be sending up a toy pig (well a small squeaky dog toy)


Similar to the Eggsplorer-1 the main tracker will be a Raspberry Pi fitted with a camera and two transmitters.

The tracker is based on the "Pi In The Sky" code base/design by Dave Akerman (M0RPI) and Anthony Stirk (M0UPU) with some modifications since I am building on simple strip board using a different GPS module/interface and omitting any power supply monitoring.

On the Eggsplorer I used an old Pi Model B but was forced to butcher it to reduce the power demand by desoldering the network/usb chip. This time I am using a Model A+ which is smaller/lighter and has a much reduced power demand and with the locking micro-SD card socket will hopefully prevent a repeat of Eggsplorer-1's failure mode.

PINKY & PERKY are progressing well, just waiting delivery of some strip board and they should be completed in the next day or so.

PINKY will be 300-Baud RTTY, sending telemetry along with SSDV image packets using the UKHAS format.

PERKY will be using one of the LoRa modules again sending telemetry and SSDV but with greater resolution and speed, but will require a LoRa receiver/gateway (see Dave Akerman's website).

While the SSDV is attractive to tracker enthusiasts the high speed RTTY is more difficult to receive, so I will be flying a secondary 'backup' tracker. The use of a backup proved invaluable on the Eggsplorer when the main tracker failed.

PIGLET will be a 50-baud RTTY transmission with telemetry and should prove easier to receive.

I finished PIGLET at the weekend


Again built on strip board it is based around the ATMEL ATMega128 micro-controller using the Arduino system with a number of off the shelf modules connected to it.

It has one of the GY-GPS6MV2 GPS modules I blogged about last year feeding into the UART. The NTX-2B transmitter (frequency agile version from Hab Supplies) and a I2C BMP180 pressure/sensor module (not visible as mounted to measure external conditions) It also has a small boost converter to supply 5V and extract all the available power it can from the 3-AA lithium battery pack.

One change compared to the EGG1 tracker is to use a PWM output from the Arduino to generate the RTTY tones rather than a register voltage divider (guide here) which seems to give a cleaner signal.

The antenna is simply copper wire making a 1/4 wave ground plane. The 'box' are some layers of styrofoam glued together with UHU-Por with duct tape, some straws and beads for safety. Just needs the batteries fitting and the lid fixing with more duct tape and PIGLET is ready to fly.



Full details of frequencies will be posted nearer the time.

Already a week into September and not long now till the National Hamfest where I and the South Kesteven ARS are launching a high altitude balloon launch subject to CAA approval. The documents have been submitted so just waiting for the nod.

The balloon and parachute have been purchased from Steve Randall (G8KHW) at Random Engineering, using the same size as I did for the Eggsplorer-1

I had joked about sending some "Ham into space" on this flight but following the smelly end to Eggsplorer-1 have opted to play it safe and avoid food! Instead will be sending up a toy pig (well a small squeaky dog toy)


Similar to the Eggsplorer-1 the main tracker will be a Raspberry Pi fitted with a camera and two transmitters.

The tracker is based on the "Pi In The Sky" code base/design by Dave Akerman (M0RPI) and Anthony Stirk (M0UPU) with some modifications since I am building on simple strip board using a different GPS module/interface and omitting any power supply monitoring.

On the Eggsplorer I used an old Pi Model B but was forced to butcher it to reduce the power demand by desoldering the network/usb chip. This time I am using a Model A+ which is smaller/lighter and has a much reduced power demand and with the locking micro-SD card socket will hopefully prevent a repeat of Eggsplorer-1's failure mode.

PINKY & PERKY are progressing well, just waiting delivery of some strip board and they should be completed in the next day or so.

PINKY will be 300-Baud RTTY, sending telemetry along with SSDV image packets using the UKHAS format.

PERKY will be using one of the LoRa modules again sending telemetry and SSDV but with greater resolution and speed, but will require a LoRa receiver/gateway (see Dave Akerman's website).

While the SSDV is attractive to tracker enthusiasts the high speed RTTY is more difficult to receive, so I will be flying a secondary 'backup' tracker. The use of a backup proved invaluable on the Eggsplorer when the main tracker failed.

PIGLET will be a 50-baud RTTY transmission with telemetry and should prove easier to receive.

I finished PIGLET at the weekend


Again built on strip board it is based around the ATMEL ATMega128 micro-controller using the Arduino system with a number of off the shelf modules connected to it.

It has one of the GY-GPS6MV2 GPS modules I blogged about last year feeding into the UART. The NTX-2B transmitter (frequency agile version from Hab Supplies) and a I2C BMP180 pressure/sensor module (not visible as mounted to measure external conditions) It also has a small boost converter to supply 5V and extract all the available power it can from the 3-AA lithium battery pack.

One change compared to the EGG1 tracker is to use a PWM output from the Arduino to generate the RTTY tones rather than a register voltage divider (guide here) which seems to give a cleaner signal.

The antenna is simply copper wire making a 1/4 wave ground plane. The 'box' are some layers of styrofoam glued together with UHU-Por with duct tape, some straws and beads for safety. Just needs the batteries fitting and the lid fixing with more duct tape and PIGLET is ready to fly.



Full details of frequencies will be posted nearer the time.

you can sleep soundly tonight!

You have no competition from W2LJ - whatsoever. I have finished the 2015 Skeeter Hunt Soapbox and have posted it to the Web. A bona fide Web designer probably could have done in an hour what took me a lot longer to accomplish. And I bet it would look a lot better, too. Mr. Originality or Mr. Creativity, I am not!

In all their non-glory, they are there for your perusal. Just click and go!

2015 Scoreboard

2015 Soapbox

72 de Larry WLJ
QRP - When you care to send the very least!

It was this time of year, from August 28th to September 2nd, 1859 that the Earth experienced what was to be known as The Carrington Event. On September 1st, a solar flare was observed by two British amateur astronomers, Richard Carrington and Richard Hodgson.


This was a coronal mass ejection that occurred during Cycle 10. It was a solar storm of such great intensity that reportedly, people as far south in Florida and Cuba were able to see aurora. In the Rockies, gold miners woke up in the middle of the night and started preparing breakfast because they thought it was daybreak. The aurora was so bright here in the northeast, that people outside were able to read newspapers by the aurora's glow.

Telegraph stations (our forerunners) were hit particularly hard. It was reported that some telegraph poles threw sparks into the air. Telegraph operators reported that not only did they receive shocks when they tried to operate, but that they were also able to continue to operate their telegraph apparatus after disconnecting it from the power supply.

I can only imagine the damage that would occur today if we suffered a direct blast from the sun as we did in 1859. I'm pretty sure that not only would the power grid be very badly affected, but that telephone and radio communications of all types would probably be non-existent, and much, much more.

Here are some interesting links:

http://news.nationalgeographic.com/news/2011/03/110302-solar-flares-sun-storms-earth-danger-carrington-event-science/

http://science.nasa.gov/science-news/science-at-nasa/2008/06may_carringtonflare/

http://www.history.com/news/a-perfect-solar-superstorm-the-1859-carrington-event

72 de Larry W2LJ
QRP - When you care to send the very least!

Every now and then I wander over to eHam. net. And sometimes I wonder why I bother to wander.

It's not uncommon for me to read the articles, and then inevitably, come across some comment by a self-proclaimed "newbie" wherein he or she begins to bemoan the treatment they've received from some "old fart", nasty, mean ol' Ham.

The common scenario seems to be:

"I'm new, bright-eyed, bushy tailed, full of exuberance and spit and vinegar -  but yet somewhat lacking in knowledge and experience. I've gone to WB#XYZ repeater or to the Amateur Radio Club of Greater Podunk, where my inquiries were met with laughter, ridicule, sarcasm and down right meanness from Joe Ham. I am now going to sell all my Amateur Radio equipment because I'm traumatized and I never even want to hear the words "Amateur Radio" again."

I've seen this retold several times, in several different instances. I hate to question the veracity of the people making these claims - but can they be true? This has become a pet peeve of mine.

I've mentioned many times now, that I've been licensed for over 35 years. In all that time, I have never, ever, not even once come across treatment like that from an older Ham. Don't get me wrong, I've had to withstand my share of newbie ribbing, and have received my share of friendly and gentle reprimanding when doing something wrong - but nothing like these guys are describing.

A case in point. Shortly after upgrading to General in 1979, I joined the Old Bridge Amateur Radio Association.  They owned and operated the KB2TX repeater at the time (well actually, it became the KB2TX repeater after Walt, the owner, changed his callsign to KB2TX - I forget what it was before that). Anyway, I had installed a used non-Icom microphone with a DTMF pad on my Icom 2 Meter mobile, so that I could make phone patches if the need came up.  Back in those days, (am I dating myself?) it was rare for a mobile microphone to come with a keypad pre-installed. Unbeknownst to me, the microphone's element wasn't working. The DTMF tones were making it through, but my voice wasn't. So Walt got on the air and in his usual gruff  and no-nosense manner announced, "Hey! Whoever's sending the tones - you've got no audio. Stop it and identify yourself".  I was saying "KA2DOH (my call at the time) testing.", but it wasn't coming through.  I had Walt's phone number and gave him a call, explaining the problem.  After listening to my profuse apology, he got quiet and thought for a few seconds. Instead of giving me a tongue lashing, as technically I was breaking the rules, he suggested that the impedance of the microphone element might not be the proper valuthat the rig was looking for - a mismatch. Sure enough, that's what it turned out to be.

I listened and I learned something (that had never occurred to me) and was able to remedy the situation by going to Radio Shack, where I purchased and soldered into my microphone an element with the proper impedance.  Walt could have dressed me down, and read me the riot act, but he didn't. He was that way to everybody. In fact, in dealing with all the Old Timers throughout my Amateur Radio career (there were many) - they were all like that.  I can't ever remember a time where I received a snotty, snarky or sarcastic reply to a question. In fact, in my dealing with experienced Hams, they have always been helpful, accommodating and educational. And I live in New Jersey, too - supposedly the home of unfriendly, sarcastic, snarky and just plain mean ol' human beings in general!

So where does this curmudgeon live?  DOES this curmudgeon live? Or have we become so hyper-sensitive to any kind of criticism that even helpful criticism is taken as an incidence of ego-shattering reprimand?

Maybe they do exist, and maybe I'm lucky that I've never come across one.  Maybe I just need to go down on bended knee and be grateful that I've never run across the "No kids, no lids, no space cadets" type of Ham.  I can tell you that I have become dear friends with several "Old Timer" Hams who did have very rough and gruff reputations, only to find out after spending some time talking with and listening to them, that they had hearts of pure gold. Sometimes that's all it takes, just listening for a bit instead of always chattering and insisting that we know everything, and that we're always right - when maybe, just perhaps, we're not.

Food for thought.

72 de Larry W2LJ
QRP - When you care to send the very least!

Following the euphoria of the Eggsplorer-1 payload being found six weeks after launch washed up and retrieved from the beach in Terschelling, Netherlands it has been an agonising wait to see what the Dutch police would send back. My impatience got the better of me last week and I contacted them directly to be told that unfortunately due to the awful smell and condition of the box they had simply removed the memory card and had posted that back as requested.

More days past and I was beginning to think irony was going to play a cruel trick and the card after its fantastical journey would end up lost in the post. I shouldn't have been so pessimistic as it arrived today! Along with the card was a detailed map showing the final location and labels from the side of the box.



There was a nice note from the police.


The SD memory card seemed to have had survived more or less intact, though there was some corrosion on the contacts and crucially a small corner of the card was broken off.



The plan was to use the Win32 Disk Imager program to make a direct raw image of the card and work on that copy. I first used a small wad of wire wool to gently clean up the contacts

I was encouraged when I inserted the card into my Microsoft Windows laptop and it was detected, however my heart sank when any attempt to access it or use the imager program was met with an error. I gave it another gentle going over with the wire wool and thankfully was then able to make a image file, the next stage was to extract the precious data.

The card of course contained the Linux based Raspberry Pi file system and in order to access it on a Windows machine I used the freeware linux-reader from DiskInternals which allows access to Ext2/Ext3/Ext4, HFS and ReiserFS file systems within Windows.

It was a simple case of using the "mount image file" option and the partitions were then accessible and everything appeared intact, there were images on the card unfortunately not the "egg in space" image I wanted, just some nice "egg in the clouds" shots.



The telemetry log file confirmed the worst, the flight computer had indeed stopped/crashed at approx 2.5km up and no further images had been captured of the 31km accent into the stratosphere (confirmed by the backup tracker) I had hoped the transmission had stopped because of a fault in the antenna or the radio module board alas this wasn't the case.

On the day of the launch I did have problems with the payload not booting up. It had worked flawlessly under test the previous weeks and I had secured everything in the box ready for the flight. The day before the launch I had spotted there was another balloon going up in the UK at the same time and we had both opted for the same frequency. So at the eleventh hour I was forced to take out the SD card to change the configuration to prevent the transmission clash.

The launch day start up problem was the SD card. I had removed and reinserted it to get it to start up and secured it down with plenty of gaffa tape. Looking at the card now and the fact the broken corner is old damage I am convinced this is the reason for the failure as the card may well have become dislodged due to turbulence.

While slightly disappointed it is still a miracle I have any images at all and can only thank Jan and the Dutch Police again.

I have certainly learned a lot and hope the National Hamfest HAB that I and South Kesteven ARS are flying is more successful

Following the euphoria of the Eggsplorer-1 payload being found six weeks after launch washed up and retrieved from the beach in Terschelling, Netherlands it has been an agonising wait to see what the Dutch police would send back. My impatience got the better of me last week and I contacted them directly to be told that unfortunately due to the awful smell and condition of the box they had simply removed the memory card and had posted that back as requested.

More days past and I was beginning to think irony was going to play a cruel trick and the card after its fantastical journey would end up lost in the post. I shouldn't have been so pessimistic as it arrived today! Along with the card was a detailed map showing the final location and labels from the side of the box.



There was a nice note from the police.


The SD memory card seemed to have had survived more or less intact, though there was some corrosion on the contacts and crucially a small corner of the card was broken off.



The plan was to use the Win32 Disk Imager program to make a direct raw image of the card and work on that copy. I first used a small wad of wire wool to gently clean up the contacts

I was encouraged when I inserted the card into my Microsoft Windows laptop and it was detected, however my heart sank when any attempt to access it or use the imager program was met with an error. I gave it another gentle going over with the wire wool and thankfully was then able to make a image file, the next stage was to extract the precious data.

The card of course contained the Linux based Raspberry Pi file system and in order to access it on a Windows machine I used the freeware linux-reader from DiskInternals which allows access to Ext2/Ext3/Ext4, HFS and ReiserFS file systems within Windows.

It was a simple case of using the "mount image file" option and the partitions were then accessible and everything appeared intact, there were images on the card unfortunately not the "egg in space" image I wanted, just some nice "egg in the clouds" shots.



The telemetry log file confirmed the worst, the flight computer had indeed stopped/crashed at approx 2.5km up and no further images had been captured of the 31km accent into the stratosphere (confirmed by the backup tracker) I had hoped the transmission had stopped because of a fault in the antenna or the radio module board alas this wasn't the case.

On the day of the launch I did have problems with the payload not booting up. It had worked flawlessly under test the previous weeks and I had secured everything in the box ready for the flight. The day before the launch I had spotted there was another balloon going up in the UK at the same time and we had both opted for the same frequency. So at the eleventh hour I was forced to take out the SD card to change the configuration to prevent the transmission clash.

The launch day start up problem was the SD card. I had removed and reinserted it to get it to start up and secured it down with plenty of gaffa tape. Looking at the card now and the fact the broken corner is old damage I am convinced this is the reason for the failure as the card may well have become dislodged due to turbulence.

While slightly disappointed it is still a miracle I have any images at all and can only thank Jan and the Dutch Police again.

I have certainly learned a lot and hope the National Hamfest HAB that I and South Kesteven ARS are flying is more successful