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Welcome to George Smart's Homepage!

Hello and welcome to George Smart's space on the Internet. This site documents many of my projects in the form of articles.


The site navigation is a little confusing and for that I apologise. I can't find a nice way to make the page navigable; the search box in the top right may help. None of the URLs have changed, and no Wiki managed pages ever get deleted -- they are all here somewhere!


If you spot any dead links or problems with the site, then please do Contact Me. I have limited time and so don't always check things as thoroughly as I should!




Recent News

So I've decided to have a blog-style few entries on the homepage of the website. I'll see how up to date I can keep this. Given that the page used to change every year or so!


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18 MHz Station

Sunday, 24 August 2014. This weekend we reconfigured our 14 MHz homebrew yagi to operate on 18 MHz instead. This was for the Havering & District Amateur Radio Club August Work The World Weekend


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14 MHz Homebrew Yagi

Sunday, 20 July 2014. Took the 14 MHz home-brew beam (right) out this weekend for LEFARS annual field day at Alymers Farm. Conditions were not so great, but we managed to work some nice DX including VK6, plenty of North America and Canada, and several more rare locations.


Thursday, 10 July 2014. Ordered a 144 MHz Anglian Transverter from Sam, G4DDK, as well as a DEM L144LNACK-2N low noise preamp for 144 MHz. I am very short of time of late, but it is my intention to experiment with some EME operation this summer and winter, so I figured I had better start buying...


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Driving through the Swiss Alps
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Driving to Italy

28 June -- 2 July 2014. Drove to the Ham Radio Friedrichshafen International Exhibition for the second time, this time leaving a few days each side to recover from the long drive. In the first spare day we drove into Italy (right), stopping in Liechtenstein (to say we had been). Going, we drove over the Alps (left) and returned back via the tunnels through the Alps (as it was dark). Utterly amazing drive!


Tuesday, 10 June 2014. Working late from Monday evening till Tuesday morning to get some of the Contiki timer issues fixed. I think I have corrected a bug with the Contiki rtimer code for the TelosB mote, but that remains to be seen. The code functions great in the simulator with the modded timer library, but still doesn't work on hardware.


Sunday, 8 June 2014. Over the weekend I worked on my 1.25 kW solid state PA based on F1JRD's design from Dubus. I bought the kit at the Friedrichshafen Hamfest last year and built it up late 2013 but due to problems, I never had more than around 40W output. This weekend, with a new set of capacitors from ATC I rebuilt the output matching and fired it up once again. With my 1kW/50V power-supply I can get around 600W output, which his more than enough. This is still a work in progress, but things are moving forward with the project. Design information here.