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Wednesday, August 26, 2009

Homebrew Hero: Sir Douglas Hall


Sir Douglas Hall is one of my homebrew heroes. When he passed away in 2004, a picture similar to the one above appeared next to his obit in several of the UK newspapers. I clipped that picture and taped it into my log book.

Here's a great web site with Sir Douglas's articles:

http://www.spontaflex.free-online.co.uk/

The intro from an old article by Sir Douglas in the in the UK magazine "The Radio Constructor":
The writer lives in Northern Rhodesia and his nearest neighbors are 25 miles away. The nearest town, cinema, doctor and electric light mains are 77 miles away by a road that is not always passable. Wireless is therefore supremely important but there are several problems in the design of a receiver suitable for these conditions. It must be very sensitive to provide reliable reception from Daventry (a transmitter site in the UK) under all conditions. And it must be very economical owing to the high cost of batteries in these parts. ------------------------------------------------------------
From "The Telegraph" (UK)

Sir Douglas Hall, 14th Bt, who has died aged 95, ended a full career in the Colonial Service as the last Governor of the Somaliland Protectorate; previously, he had for almost 30 years served in Northern Rhodesia (now Zambia).

Hall's governorship of Somaliland was short. He was appointed with effect from July 11 1959; less than a year later, he and his wife flew out of the territory a few hours prior to the ceremony, on June 26 1960, that concluded the transfer of power to the new self-governing authority.

The time-scale had been set by the approaching end, after a 10-year period, of the Italian stewardship of the UN Trusteeship of Somalia to the south. If the Somalis of the Protectorate were to unite with their neighbours at the time of the independence of Somalia on July 1, the June 26 date had to be met.

Yet there was nothing over-hasty about Hall's management of the transition. Iain Macleod, then Secretary of State for the Colonies, wrote to him afterwards praising his "speedy command of the confidence of the people enabling the final transfer of power to take place so smoothly and yet so rapidly".

It was not only a grateful Colonial Secretary who voiced his appreciation. Mohamed Ibrahim Egal, the new country's first prime minister, wrote to Hall more than 30 years later recalling "the quiet, always helpful counsel you gave me at that momentous turning point in Somaliland's destiny".

Douglas Basil Hall was born on February 1 1909 (his eldest brother's 11th birthday), the third son of Captain Lionel Hall, an officer in the 4th South Staffordshire Regiment. The baronetcy, of Nova Scotia, was created for John Hall, of Dunglass, in 1687.

From Radley, Douglas Hall went up to Keble College, Oxford, and then in 1930 joined the Colonial Administrative Service. He soon found himself one of 12 cadets - "all bursting with energy," he remembered - bound for Northern Rhodesia, which until 1924 had been administered by the British South Africa Company. The group of cadets - including "three Varsity Blues, two oarsmen, one amateur pilot, one hunter, and a wireless enthusiast [Hall] who later developed into an expert in that field" - made the long sea voyage to Cape Town, and then the rail journey up to Livingstone on the Zambezi.

In those days, there were still people living in the territory who had actually known David Livingstone. In other ways, too, it was a world away from today: one of Hall's colleagues, for instance, had a private income sufficiently large for him never to bother about cashing his pay cheques.

Hall became a District Officer in 1932, and for the next 18 years worked sure-footedly within that colonial administrative culture that sought to balance a maximum of respect for local custom and practice - and, indeed, structures of power - with British notions of justice and development.

He proved as adept in remote bush stations as in such urban postings as Kitwe, where the development of the copper mines was bringing with it new forms of labour relations and new challenges in maintaining the trust of the local people. Here Hall won an early reputation for skilful diplomacy.

It was, though, life in the bush that he enjoyed the most, in particular going on tour. A District Officer was expected to maintain personal contact with the peoples of his district and this meant getting out, often on foot and for long periods of time, to tour the villages and settlements. Whenever possible, Hall was accompanied by his wife Rachel, who joined him in Africa in 1933, and by their young children. From time to time, the family also stayed with the Gore Brownes, whose house, Shiwa Ngandu, has since been immortalised in Christina Lamb's book Africa House.

Colleagues viewed Hall as a commanding figure, fair, respected and likeable. In his book African Sunset, Robin Short wrote that Hall "was the ideal to all of us of what a District Officer should be. In appearance distinguished, his manner was exactly the same to junior clerks as to senior officers, always equable and courteous. Always he seemed in complete control of every aspect of the work, of every corner of the Province."

Hall was promoted Senior District Officer in 1950, and in 1952 became the first Officer-in-Charge of the North-Western Province, which had been created in consequence of a report that Hall himself had produced. He was promoted Provincial Commissioner in 1953 and Administrative Secretary in 1954.

He was then Secretary for Native Affairs to the Government of Northern Rhodesia from 1956 to 1959 (Acting Secretary, 1958), working in the central administration in Lusaka. He proved an able speaker in the Legislative Council and later an important contributor within the Executive Council.

Although only 50, Hall was on the point of retirement when he was invited to go to Somaliland. He accepted - having (with some pride) wrung an exceptional agreement from the Colonial Office that he could draw his pension while earning his governor's salary, provided he did not build up a second pension.

Professing neither modernism nor tradition, Hall always did what he believed appropriate for the time, the place and the people. When it became difficult for the Somaliland Scouts to provide him with an ADC for all occasions, he appointed his personal assistant, now Betty Thom, to the role. A woman ADC without military rank was a rarity in those days, though as far as Hall was concerned he was simply making sensible use of a capable person.

On leaving Somaliland, Hall was still only 51. But he and his wife decided to settle at Ringmore, in Devon. He became a magistrate and then chairman of the Kingsbridge bench, and was a member of the Devon and Cornwall Police Authority from 1971 to 1979. He also took the opportunity to spend much more time on an interest that had begun when he was a schoolboy of 15: the design and making of wirelesses.

The design principle of these was of great interest to other enthusiasts. More than 100 articles, with circuit diagrams, construction advice and commentary on the electronic design principle, were published in the magazines Radio Constructor and Radio Bygones between 1964 and 1999. There is now a website called "The Ingenious Circuits of Sir Douglas Hall".

He could as easily have occupied himself re-designing cars, for which his enthusiasm was almost as great. He was life president of the Trojan Club, and for years a familiar figure driving around Devon in his open-top 1937 Bentley.

He was appointed CMG in 1958, and KCMG in 1959. He succeeded his brother in the baronetcy in 1978.

He married, in 1933, Rachel Marion Gartside-Tippinge, who died in 1990. Latterly, Hall, who died on April 8, moved to live near a daughter in Derbyshire. He is survived by a son - John Hall, who was born in 1945 and succeeds in the baronetcy - and two daughters; another son died in infancy.

Monday, August 17, 2009

Pico-Sats, Texas, Dubai, Balloons



Our man in Dubai, Ron Sparks, AG5RS, sent in this very interesting report on the very small satellites. Obviously lots of QRP relevance here:

Hi Bill,

I am attaching some news you may find interesting. If you remember last year I did an echolink => IRLP => 2m linkup to make QSLs on the Balloon Launch (BLT-24). Besides the usual repeater and video gear, we also had an interesting "hitchhiker" on the payload.

It was the functional engineering model of the BEVO-1 picosat. You can see pictures of the model and the balloon payload here:

http://www.w5acm.net/b24.html

This unit sent beacon information during the balloon launch and we tested it environmentally by doing so. Data on the sat itself is at:

http://www.utexas.edu/news/2009/06/09/picosatellite/

A sister satellite was being prepared by my alma mater, Texas A&M, who then docked their sat with the UT sat and put them on the Shuttle mission STS-127. Photos are here:

http://www.ne.jp/asahi/hamradio/je9pel/dragonst.htm

All of this is part of NASAs DRAGONsat program. This is a new GPS system being developed by NASA.

I know that the satellite stuff is a little "far afield" for Soldersmoke, but you might find the connection to the Houston balloon community interesting. Those of us who get together and annually launch the balloon are without question Soldersmoke-ers with chronic cases of "the knack". It is fun for me to see that actually be useful toward a next generation replacement for GPS satellites.

All the best.
73 from Dubai, Ron AG5RS and A65BQ

Sunday, August 16, 2009

Back to WSPRing

Mark, K6HX, and Roger, G3XBM, are responsible for me going back to WSPR mode. Both have been blogging about the fun they are having with this mode. It was too hot in Rome to go out this afternoon, so, after a morning visit to the Trastevere flea market (where I got a US Robotics dial-up modem for my soon-to-be functional Satellite Pro computer (thanks Jeff!), I ensconced myself in the shack, and did the changeover from visual MEPT to WSPR. This mode provides instant gratification: almost immediately I was being picked up and reported by EI7GL.

Thursday, August 13, 2009

SolderSmoke (The Book) Reaches the Oregon Coast

Wes, W7ZOI, took the book with him on vacation and sent along this shot from the Oregon coast. I told Wes that I was really nervous when I saw his e-mail in my in-box. The book has sections about my "understandings" of various aspects of electronic theory. I worried that the e-mail would reveal that these were all "MIS-understandings." I was very relieved that wasn't the case! Wes provided an interesting bit of ham radio history/trivia: Around page 169, I have the iconic picture of Wes out in the winter woods somewhere, with a homebrew QRP rig in his hands. I remember seeing this picture as a kid. I found it inspirational: a stoic homebrewer, using his invention to communicate from out in the hostile wilderness. In his e-mail, Wes tells me that in that photo, he was actually in contact with another station. It was Lionel, VE6WG, up near Calgary. This photo was taken by K7IUN. Thanks Wes!

Wednesday, August 12, 2009

VE7NSD: The Knack, personified

We've occasionally provided photos that seem to capture the essence of "The Knack." Here is another one. This is Stephen, VE7NSD, operating from his trailer out in the wilds of British Columbia. I found Stephen's story to be really inspirational. His first receiver was a Gillette Blue Blade! His first QSO was with Beaverton, Oregon! He took typing in 9th grade (the only boy in the class!) so that he could copy CW faster. Here is an excerpt from his QRZ.com page:

I started playing with radios in Roseburg, Oregon when I was ten. My Dad’s prospecting buddy Cliff, had been a Radioman in the USN and turned me on to building a crystal set using a Gillette Blue Blade for the detector. I built it but had no headphones and ordered some from the Allied Radio catalog. I felt like it took about 6 years for them to arrive, but it was probably more like 6 weeks. When the headphones finally came the xtal set didn’t work and so I started learning troubleshooting. Eventually, it worked fine and I experimented with a hunk of galena my Dad had in his rock collection.

From there Cliff gave me circuits for regenerative receivers and I built a few but none of them ever produced a usable output. All of my SWL listening had to be on the big console radio in our living room.

I can’t remember how I came to have an Arc 5 receiver for 80M, but that was my first real radio. It was probably a gift as I had no money except what I got from my paper route and all of that went to pay for the bike I used to deliver the papers. I started going to local ham club meetings and Bob Reese, W7TUI, became my mentor.

I read a copy of How To Become a Radio Amateur and started collecting parts to build the single 6V6 transmitter on the orange crate slat chassis. All of my parts had to be scrounged from the radios, TV’s and other electronic gear that was given to me. I built the power supply on a home bent chassis. I got it to work on out-of-band xtals but it had a mean chirp. W7TUI showed me how to add a VR to the power supply to feed the screen grid in the 6V6 and that cleaned up the chirp.

I was licensed as WN7VTZ in 1952 at age 12. My first QSO was with Beaverton, Oregon, with less than 10 watts input and feeding a random wire with no ATU. I suspect that there wasn’t much radiated power from that lash-up. Another buddy in Roseburg was licensed at the same time I was and we contented ourselves with cross-town QSOs.

I was the only boy in my grade 9 typing class. But, I was glad I learned to type. I could copy CW quite fast, much faster than I could write. The first time I sat down to my typewriter, put on the headphones, and put my fingers on the keys it was like magic. When my ear heard a di dah, my left little finger pushed a key. Di dah dah dah and my right index finger pushed a key. I could just sit there and watch the message appear on the typewriter paper. No effort required!

Read the full story on his QRZ.com page: http://www.qrz.com/detail/VE7NSD

And check out his Wilderness Workbench site (complete with a real moose skin):

http://www.qrpedia.com/book/200812/wilderness-workbench-ve7nsd

Sunday, August 9, 2009

SolderSmoke Podcast 113



http://www.soldersmoke.com
August 9, 2009
The Ponticelli Astronomical Observatory and QRP Station
Mystery Sound -- Can you ID?
Even Farhan Fries Transistors
Google marks Tesla's birthday
Adventures with Google Ads
Spotting the Space Station from Rome (and from London)
Arthur C. Clarke's version of MAILBAG
Mystery beeps in SS111?
MAILBAG

Space Hackers Video: IT'S BACK!!!!!

Hope this one doesn't get taken down. Great stuff from Turin, back in the day!

http://www.ch73.net/player.php?id=347&table=1&ln=nl

Tom's Receiver with Hybrid Cascode IF



I really like Tom's videos (and the receivers that are in them). Thanks Tom!

Thursday, August 6, 2009

Micro-watt WSPRing by Gene, W3PM

Hi Bill,

As you know by your experience using 20 milliwatts, Weak Signal Propagation Reporting (WSPR) is an excellent mode to experiment with low power. A QRPp experimenter can received near instantaneous automated reports over the internet from hundreds of stations throughout the globe.

During the last few days, I have been experimenting on 30 meters with output powers as low as 20 microwatts. No one has spotted my 0.00002 watt signal yet, but K8CXM has spotted my 50 microwatt signal at a distance of 553 KM at 2332UTC, 05 AUG 09.

I used a 100 mW GPS timed beacon with a step attenuator to an indoor doublet for all the tests. All equipment is homebrew and the output power is verified with a HP-432A Power Meter. If you look in the WSPR on-line database the power is reported as 0.100 watt because it was too difficult to pull out and reprogram the beacon’s PIC controller chip for each change of power. In any case, there are no provisions to report power levels below 1 milliwatt to the WSPR database.

Other noteworthy spots:
100 uW - K8CXM, 2252UTC, 05 AUG 09, 553 KM
200 uW - AI4SA, 0530 UTC, 02 AUG 09, 333 KM
500 uW - NJ0U, multiple spots 31 JUL & 01 AUG 09, 716 KM
500 uW - K1JT, 1440 UTC, 31 JUL 09, 1215 KM
500 uW - W3HH, 1240 UTC, 31 JUL 09, 764 KM
5 mW - VK6DI, 2232 UTC, 05 DEC 08, 17,858 KM

A 6.5 meter auto tuned vertical with 50 ground radials was used for the VK6DI report. The vertical is disguised as a birdhouse support because I live in an antenna restricted neighborhood.

Of course all the credit goes to the receiving stations that no doubt live in a very quiet RF environment. The reports do not represent any records, but they may be of interest to other QRPp experimenters. .

Gene W3PM

Tuesday, August 4, 2009

Sabina QRP Station and Astronomical Observatory

This year, in an effort to get the kids out of Rome, we rented a summer house out in the Sabine Hills, a beautiful area just one hour north of the city. The picture shows a typical scene from the region. I brought out my HW-8, a gel-cell battery, my VW solar panel, the pi-network antenna tuner I picked up at the Trastevere flea market last winter, and about 50 feet of AC zip cord. I threw the wire into a tree and was able to tune up on 20 and 40. First station worked was near Catania, in Sicily (close to where we stayed last month). Also worked Germany and Bulgaria. I hope to use one of the tall Roman pines (like the one in the picture above) to support a vertical wire.

I also have my telescope out at the summer place, and we used it last weekend to look at Jupiter. I couldn't see the recently discovered scar, but we got great views of the clouds, and the four Galilean moons. More to follow...
Designer: Douglas Bowman | Dimodifikasi oleh Abdul Munir Original Posting Rounders 3 Column