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SM2FOB Ham Radio

Kjell SM2FOB (ex SM0FOB) QTH BODEN KP05vs SWEDEN - ITU18 WAZ14

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My new handmade QSL card

October 12, 2015

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Now SM2FOB

October 09, 2015

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Partial solar eclipse in Sweden

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Aurora March 17 2015

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My shack layout 2015

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How to check SMFF activity

January 24, 2015

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It´s cold outside

January 23, 2015

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CQ Ham Radio Magazine Feb 2015

January 22, 2015

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Christmas Aurora

December 25, 2014

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Merry Christmas

November 28, 2014

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SM0FOB is calling ...

November 27, 2014

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Result from 6 months use of the 60 m band

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Save and display QSL cards

January 06, 2014

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Arkiv

2018 1
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    Receiving Japan on 50 MHz

2017 26
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2010 68
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2009 86
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2008 85
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Popular Posts

Space Antennas

Two weeks ago I did visit the exhibition NASA - A Human Adventure at the Technical Museum in Stockholm, Sweden. An exhibition with not only scale models from space exploration history, but also full scale models that cannot be distinguished from the original ones. As a radio amateur I had special interest in some of the antennas being shown :-) This is the Russian Lunokhod (Moon walker) with is solar panel lid flung open. One antenna half is an ordinary helix UHF antenna, but what is the purpose of the other half? Anyone knows? The Lunar Rover´s umbrella antenna has a black strange object at its back. What is it? Update 6 April, 2011 It is possible to download from NASA the Lunar Rover Operations Handbook . On page 119 there is a drawing explaining that the black object is an optical sight. This is Sputnik 1, the first satellite, weight 83 kg and diameter 58 cm. From Wikpedia I found following information about its antennas. The satellite carr...

Hunting Schumann Resonances

Quote Wikipedia : The Schumann resonances are a set of spectrum peaks in the extremely low frequency portion of the Earth's electromagnetic field spectrum. Schumann resonances are global electromagnetic resonances, excited by lightning discharges in the cavity formed by the Earth's surface and the ionosphere. This global electromagnetic resonance phenomenon is named after physicist Winfried Otto Schumann who predicted it mathematically in 1952. Schumann resonances occur because the space between the surface of the Earth and the conductive ionosphere acts as a closed waveguide . The limited dimensions of the Earth cause this waveguide to act as a resonant cavity for electromagnetic waves . The cavity is naturally excited by electric currents in lightning. Schumann resonances appear as distinct peaks at extremely low frequencies around 7.83 (fundamental), 14.3, 20.8, 27.3 and 33.8 Hz. Observa...

ROS - A new digital mode

ROS, developed by José Albert Nieto Ros, is a new digital mode under test. Using spread spectrum and 1 or 16 Baud signalling rates it is designed to cope with disturbancies, low level signals, meteor scatter and moon bounce says José. He claims that receiving signals down to -35 dB (!) with 1 Bd signalling rate and -30 dB (!) with 16 Bd are possible. Today I tested 16 Bd reception on 14.1011 MHz. My set-up is shown above with the PC microphone close to a Yaesu FT-857D. This PC screen dump shows that I did receive PA0JMK in The Netherlands calling YU1RP in Yugoslavia. Unfortunately the vertical screen resolution of my mini-PC is not large enough to show the waterfall part of the ROS GUI. ROS home page from where you can download the software, instructions etc. is here and a video is here . The ROS mode has caused som stir as it occupies a large bandwidth of 2.2 kHz in the HF bands. The mode has become forbidden to use in the U.S. because of the spre...

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