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

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Netbook Acer Aspire One A0A150

January 04, 2009

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Testing WXVGA Recording With A Lumix LX3

December 29, 2008

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Testing HD Recording With A Lumix LX3

December 29, 2008

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Europeana: think culture

December 28, 2008

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HD Video Panasonic Lumix DMC-LX3

December 25, 2008

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Panasonic Lumix DMC-LX3 Photos

December 25, 2008

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Panasonic Lumix DMC-LX3

December 25, 2008

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Merry Christmas

December 08, 2008

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CQ ham radio Dec 2008

November 27, 2008

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A Radio Engineering Masterpiece

November 20, 2008

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Dogfight Above Ölands Södra Udde

November 19, 2008

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Millions Of Historic Photos

November 19, 2008

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Listening On The Leonids

November 18, 2008

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Arkiv

2018 1
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  - Jun 22 1
    
    Receiving Japan on 50 MHz

2017 26
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2015 8
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2014 5
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2013 6
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2011 22
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2010 68
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2009 86
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2008 85
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Popular Posts

DXing with JTDX on 50 MHz

DXing with JTDX on 50 MHz - Kjell SM2FOB RX Icom IC-7300, ANT Broadband Scanner Antenna, QTH Boden KP05vs June 5 2017 - ODX OE5OLL JN68si 1,995 km June 6 2017 - ODX EA8DBM Canary Islands 4,931 km June 6 2017

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...

Receiving DAB and DAB+

On September 27 in 1995, the public service broadcaster Swedish Radio was first in the world to start DAB - Digital Audio Broadcasting - as a trial and this one hour before BBC started. This timing mistake was because of that local time in Sweden is one hour ahead of England :-) The Swedish trial became incredible long. The network covered for outdoor reception almost 70 % of the population. After numereous debates and investigations Swedish Radio, after more than 15 (!) years, still has the one and only DAB license. And the coverage is now also heavily limited for several reasons. Swedish politicians are very very interested in media and they are mostly to blame for this incredible DAB delay compared to other European countries. When satellite tv started they even discussed about prohibiting satellite reception dishes! In the meantime DAB has evolved into DAB+ giving more programme channel capacity, better audio quality, more suitable for indoor reception etc.. Last year Te...

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