AmateurRadio.com

Two years after discovering the hobby of High Altitude Ballooning I have migrated from being just a passive tracker and finally completed my first flights assisted by other members of the South Kesteven ARS.

Ready to launch

Back in March I posted about the opportunity I had to make a launch at this years Swaton Vintage Day and the 10th World Egg Throwing Championship

South Kesteven ARS were going to hold a special event station with the call sign GB2EGG. During the planning stage I jokingly suggested throwing an egg in to space on board a balloon, I shouldn't have yoked...

The whole venture captured everyone's imagination, sadly putting the special event station in the shade but we certainly got a lot of publicity for the club and amateur radio in general.

Featured on front page of local paper

There was certainly a lot to learn and get organised, not only did I have to design and build the flight computer which was the easy part but I had to build the payload containers get the balloon, parachute, cord the lifting gas (Helium) and build a filler assembly as well as getting official permission from the CAA for the launch.

The information on the UKHAS wiki as well as Dave Akerman's High Altitude Ballooning, From The Ground Up (and back again) were invaluable.

The cost of this venture was not insubstantial and thankfully MADHEN - The Ultimate Party Band agreed to sponsor the flight which helped greatly and I received a nice donation from fellow club member Mark Orbell (M0OBL)

Months of work and lots of last minute hitches but I was ready.

Two flights were planned an altitude 'burst' flight with a raw egg payload with a parachute decent. The main tracker MADHEN would broadcast SSDV images and telemetry with a telemetry backup tracker EGG1 suspended below it.  The second flight was a foil party balloon 'floater' with a tracker kindly donated by Steve Smith G0TDJ of ProjectAVR

Both flights flew and were a great success, unfortunately the SSDV tracker failed early in the flight so no in flight images were received.

The main payload is pictured below before the flight resting on its side. The Styrofoam box contained the flight computer and radio transmitter with a camera attached to the Raspberry Pi and the "flying saucer" model which contained the egg was positioned to be visible.
 

As this test image shows the 'egg saucer' should have had the earth below it.


However the arduino based backup tracker which was suspended below it worked perfectly.

There were some issues with getting CAA approval because the sky was very busy on the day including the last remaining Vulcan Bomber VH-558 making its farewell flight in the area, cue jokes about the Vulcan getting scrambled... but approval was given for a morning flight, not ideal for the organisers but we were still a spectacle for the handful who were there early.

Starting the fill

Checking the neck lift, made difficult by the wind

Stewart (M0SDM) helping me tie off the balloon and payload cord

The strong gusty wind made launch difficult

Me and Stewart making a dash to assist the launch

It started so well,  I was receiving telemetry and image packets and then transmission stopped


However as I said the other tracker worked brilliantly and this was the final flight path as visualised in Google Earth. The ascent and decent rate and the burst altitude were exactly as planned and predicted, so I know I got the neck lift measurement right even with the high wind on the day.

Path of MADHEN/EGG1

A splashdown at sea was inevitable due to the wind conditions, hopefully it it survived the landing it may wash up on a beach somewhere and we can retrieve the images.

With what little Helium remained I was able to lightly fill and launch a foil party balloon carrying a blown egg shell as a 'floater' which made a valiant attempt to reach the continent at 6-7km high travelling at 120+km/hr where it reportably hit bad weather and was downed.

Path of EGGDX in comparison to MADHEN/EGG1

 All in all an eggscellent day!
Andrew Garratt, MØNRD, is a regular contributor to AmateurRadio.com and writes from East Midlands, England. Contact him at [email protected].

Hello again, and welcome to Episode #149 of Linux in the Ham Shack. In this episode we tackle a number of interesting and diverse topics: Starting with Field Day and an online course on Climate Change, we move to software patent legislation, deep topics like buildroot and custom Linux images, and then to hardware reverse engineering for your benefit and a utility for helping you save battery power on your laptop. We even manage to get in an interview with our ambassador to SELF, Darrell, KI4LLA. Don't miss one action-packed second.

73 de The LHS Guys

Russ Woodman, K5TUX, co-hosts the Linux in the Ham Shack podcast which is available for download in both MP3 and OGG audio format. Contact him at [email protected].

Previously, I had written about how the use of SSB made the difference while activating Prospect Mountain (W0C/FR-069) for Summits On The Air (SOTA). This time I was the SOTA chaser, trying to work Brad WA6MM as he activated two peaks near Breckenridge, Colorado.

It was the Saturday of ARRL Field Day, so I planned to be out at our FD site in Black Forest. Brad and I had coordinated in advance and pretty much concluded that it would be difficult or impossible to make the contact on FM. Brad decided to take his FT-817 along with a homebrew 4-element yagi to give him 2m SSB capability. Out at the FD site, I saw that Brad was spotted on Bald Mountain (W0C/PR-019) via SOTAwatch early in the morning, so I borrowed the FD VHF station to try to work him. It was an FT-897 pushing 50 watts to a 4-element yagi up about 30 feet. I heard Brad clearly on 144.200 MHz (SSB calling frequency) and we made the contact.

I estimate that the contact was about 75 miles. I did not do a careful analysis of the terrain but the the signal had to get over the Rampart Range and quite a few other mountains to get from Black Forest to Bald Mountain. The summit of Bald Mountain is at 13,684 feet, so that certainly helps.

A few hours later, Brad showed up on the summit of Boreas Mountain (W0C/SP-030), another 13er near Breckenridge. By now, the Field Day station was in use, so I pulled out my own FT-817 and a 3-element Arrow yagi. Holding it in my hand, I pointed it towards Boreas Mountain and tuned to 144.200 MHz USB. This time Brad was even weaker but still readable, so we completed the contact.

In both cases, Brad was fair to good copy but just above the noise, I am sure that using FM would not have gotten the job done. For serious VHF work, 75 miles is not that great of a distance but we were running QRP power levels with small yagi antennas.

Brad and I are both concluding we need to encourage the use of SSB for 2m SOTA here in Colorado. It is common to end up on a high peak in the Colorado backcountry and not have enough range to reach the larger population centers. Sure there are more people active on 2m FM, but if no one is within range, it does not matter.

Congratulations to WA6MM for first activations of two more challenging summits in Colorado and thanks for 18 chaser points!

73, Bob K0NR

The post Use SSB on VHF For Better Range on SOTA Peaks appeared first on The KØNR Radio Site.

Bob Witte, KØNR, is a regular contributor to AmateurRadio.com and writes from Colorado, USA. Contact him at [email protected].

As part of my recovery I usually do a short 5 minute walk morning and night.  When out this evening I did a “hard” reset of my 10m and 6m WSPR stations.  All power was removed, the PC (used with the FT817 on 6m) was turned off for the duration of the walk. Now home again both the 6m and 10m WSPR kits were turned on again and the whole lot sync’d to Internet time.

I hope to stay on both bands overnight, although, so far, I have not managed to catch any transatlantic Es openings. I remain hopeful. Because of the high thunder risk later in the week I may have to go QRT though, which will be a pity. Hopefully this will be a short break only.

Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.

courtesy: arrl.org

The annual Field Day weekend always brings back fond memories of my ham radio teenage years.

Field Day always followed the end of school and the start of the summer holidays so it was always a weekend that I looked forward to, months in advance.

I always went out with the Vancouver Amateur Radio Club (VE7ARV) who used the same spot each year, just above the last street of homes high up on the slopes of West Vancouver ... it was at the base of Hollyburn Mountain and was a spectacular visual site, giving southerly views from east through west. At times it seemed like you could almost see California from up there ... it was a great spot for both HF and VHF. Our Field Day site has long been reclaimed by palatial-sized home in the prestigious 'British Properties' region of Vancouver's North Shore.


Sadly many of the organizers and operators that I remember from my youth are now long gone but they were an enthusiastic group of old-time hams that always had the time to make a young kid feel welcome and part of an important operation. Many of the same fellows were responsible for a lot of teens getting their ticket back in the late 50's and 60's. Tuesday nights were always spent in the basement 'classroom' of Hedley Rendell, VE7XW, who gave so much of his time to Elmering prospective hams as well as providing the trailored crank-up towers for our FD operations. He later established Rendell-Paret Electronics in partnership with Bill Paret, VE7AM, and the contents of Hedley's vast basement collection of parts was the beginning of a business that still flourishes to this day.

Field Day always had many high points for me. One of the best was being able to operate some top-notch equipment compared to my humble home station which consisted of an old Heathkit AT-1 and VF-1 VFO and then later, a much-used DX-35, purchased on one of the family's summer shopping trips to Seattle. In those days, the city was home to several ham radio shops and at least a dozen radio-surplus stores, all now long gone.

There were usually a couple of Collins 75A4's and later, state-of-the-art Drake 2B's. The Johnson Ranger was always reliable and such a pleasure to operate but there were always a few hundred-pound hernia-makers like the Heathkit DX-100's and the Johnson Viking II's that had to be lugged from back seats to tents every year. That's where us young guys came in handy.


VHF activity back then was mainly FM (at least in the Vancouver area) and every year we would manage to work down to the weekend hilltopers in Oregon, mainly due to our elevated location. 2m FM rigs in those days were all converted taxi rigs, mainly Motorola 5V's, run on their built-in DC vibrator supply or on a homebrewed power supply. There were at least a hundred guys on 147.33 FM, all with old taxi rigs and the frequency was busy 24/7 it seemed. These were the days before repeaters and working 50 miles was a real accomplishment.

I usually took the 40m CW shift and would operate all night. The band was always amazingly crowded with nothing but FD stations throughout the entire activity ... even the 40m phone band was plugged solid with AM action, all working the FD contest. I would never ever sleep at Field Day and would go home exhausted, usually sleeping an entire Monday, to recharge my battery ... fun days.

I haven't been out on Field Day since my late teens as other things in life became more important but I'll never forget those wonderful weekends and the great fun that was had, so many years ago
Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].

Just when everyone is taking Summer siestas and there seems very little news around to talk about.  Along comes a new Direct Conversion 40m Transceiver kit from Australia.


The MDT DSB kit is manufactured by Ozqrp, capable of 2W PEP, it has a full swinging VFO  7.090MHz - 7.130MHz or 7.050MHz - 7.110MHz all for $80 (Aus) including case, less than £40 UK plus carriage, which worked out about $12.50 (Aus) posted to the UK when I quickly did a test and popped it into the shopping trolley.

Further details and manual from http://www.ozqrp.com/MDTindex.html  
Steve, G1KQH, is a regular contributor to AmateurRadio.com and writes from England. Contact him at [email protected].

In this episode of the ICQ Amateur / Ham radio Podcast, we start our review of the Ham Radio Friedrichshafen event.

Interviews with

• Paul Bigwood (G3WYW) from Yaesu discussing System Fusion - https://www.yaesu.com/
• Michael Zwingl (OE3MZC) from OEVSV discussing the groups proposal for a more modern radio operating system - http://www.oevsv.at
• Graham Summerfield from BHI - http://www.bhi-ltd.com
• World Radio Team Championship 2018 Announcement - http://www.wrtc2018.de/
• Gerald (K5SDR) from Flex makes a product development announcement - http://www.flexradio.com 

Colin Butler, M6BOY, is the host of the ICQ Podcast, a weekly radio show about Amateur Radio. Contact him at [email protected].