Today I started an internship at ARM Holdings Ltd for 4 months so my regular activities will be somewhat interspersed for the foreseeable short-term future. Lets see what the next few months have in store for me!
All posts by M1GEO
18 MHz Yagi
This weekend we reconfigured our 14 MHz homebrew Yagi to operate on 18 MHz instead. This was for a local club’s August Work The World Weekend.
14 MHz Yagi at Alymers Farm
This weekend we took the 14 MHz home-brew beam out 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.
VHF Preamps
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.
Friedrichshafen 2014
From 28 June to 2 July 2014, a few of us where about and about in Europe! I 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, stopping in Liechtenstein (to say we had been). Going, we drove over the Alps and returned back via the tunnels through the Alps (as it was dark). Utterly amazing drive! As evidence, I offer the pictures below!
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Late Night Contiki
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.
144 MHz 1.25 kW Amplifier
Over the weekend I worked on my 1.25 kW solid state PA based on F1JRD’s design from Dubus using a MRFE6VP61K25H. I bought a complete kit at the Friedrichshafen Hamfest 2012 from F1JRD and F5CYS 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.
CQWW SSB 2013
This map shows some of the stations worked during CQWW SSB Contest, 26-27 October 2013. Operations using M0STO’s tri-band 4-ele Yagi and 300W from the Kelvedon Hatch Secret Nuclear Bunker (GB0SNB) operating as G3XBF.
We set out with the aim to work as many DXCC entries as we could within the 24 hours we were able to operate. Operations started at 16:40 UTC on the Saturday an finished at 15:10 UTC on the Sunday; operating most of the night. 54 DXCC entries worked.
The location details are from QRZ.com, where possible.
Click the map once for image details, and again for high resolution image.
Photos
Here are a few pictures from the 2013 CQWW contest, taken by Peter Allen, G0IAP.
Queen’s Jubilee Ham Radio Station MQ1GEO
This is just a quick snapshot of the station I used for MQ1GEO. The radio is an Icom IC-7400 with a Heathkit SB-200 linear amplifier and 1KW ATU.
CQWW SSB 2011
Map
This map shows some of the stations worked during the event. These details are from QRZ.com where possible.
Click the map once for image details, and again for high resolution image.
Photos
Here are a few pictures from the 2011 CQWW contest that Dave Mills (G7UVW) and I took part in.
