SM2FOB Ham Radio

Skip to main content

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

Search This Blog

Pages

Links
My Swedish Blog

Showing posts from November 20, 2008

View all

Posts

A Radio Engineering Masterpiece

November 20, 2008

0

Get link
Facebook
Twitter
Pinterest
Email
Other Apps

Arkiv

2018 1
- June 1
  - Jun 22 1

2017 26
- July 1
  - Jul 23 1
- June 2
  - Jun 06 1
  - Jun 04 1
- April 11
  - Apr 28 1
  - Apr 25 1
  - Apr 21 1
  - Apr 12 1
  - Apr 11 1
  - Apr 09 1
  - Apr 08 1
  - Apr 05 2
  - Apr 03 1
  - Apr 02 1
- March 12
  - Mar 31 2
  - Mar 29 2
  - Mar 28 3
  - Mar 27 5
2015 8
- October 2
  - Oct 12 1
  - Oct 09 1
- March 3
- January 3
2014 5
- December 1
  - Dec 25 1
- November 2
  - Nov 28 1
  - Nov 27 1
- April 1
  - Apr 02 1
- January 1
  - Jan 06 1
2013 6
- November 1
  - Nov 07 1
- October 1
  - Oct 20 1
- August 1
  - Aug 13 1
- March 1
  - Mar 19 1
- February 2
  - Feb 06 1
  - Feb 01 1
2012 18
- December 1
  - Dec 10 1
- September 3
  - Sep 11 3
- August 4
- May 1
  - May 23 1
- April 1
  - Apr 22 1
- March 3
- February 2
  - Feb 28 1
  - Feb 10 1
- January 3
2011 22
- December 1
  - Dec 14 1
- November 1
  - Nov 29 1
- September 3
- August 2
  - Aug 18 1
  - Aug 03 1
- July 2
  - Jul 22 1
  - Jul 03 1
- June 3
- March 5
  - Mar 28 1
  - Mar 23 1
  - Mar 13 1
  - Mar 12 1
  - Mar 10 1
- February 2
  - Feb 27 1
  - Feb 21 1
- January 3
2010 68
- December 2
  - Dec 30 1
  - Dec 04 1
- November 3
- October 4
- September 4
  - Sep 08 4
- August 2
  - Aug 23 1
  - Aug 08 1
- July 4
  - Jul 25 1
  - Jul 15 1
  - Jul 08 1
  - Jul 02 1
- June 5
  - Jun 14 1
  - Jun 12 1
  - Jun 09 2
  - Jun 02 1
- May 12
  - May 29 3
  - May 27 1
  - May 26 1
  - May 23 1
  - May 22 2
  - May 12 1
  - May 09 1
  - May 02 1
  - May 01 1
- April 2
  - Apr 18 1
  - Apr 05 1
- March 9
  - Mar 28 1
  - Mar 27 1
  - Mar 25 1
  - Mar 23 1
  - Mar 20 2
  - Mar 16 1
  - Mar 15 1
  - Mar 05 1
- February 8
  - Feb 27 1
  - Feb 26 2
  - Feb 23 1
  - Feb 15 1
  - Feb 09 1
  - Feb 08 2
- January 13
  - Jan 24 1
  - Jan 23 3
  - Jan 17 4
  - Jan 11 1
  - Jan 10 1
  - Jan 09 1
  - Jan 07 2
2009 86
- December 1
  - Dec 17 1
- November 8
  - Nov 17 2
  - Nov 14 2
  - Nov 13 1
  - Nov 11 1
  - Nov 09 1
  - Nov 03 1
- October 2
  - Oct 20 1
  - Oct 03 1
- September 8
  - Sep 24 1
  - Sep 23 1
  - Sep 17 1
  - Sep 16 1
  - Sep 15 1
  - Sep 14 2
  - Sep 01 1
- August 5
  - Aug 29 1
  - Aug 24 2
  - Aug 23 1
  - Aug 16 1
- July 6
  - Jul 20 2
  - Jul 18 1
  - Jul 16 1
  - Jul 14 2
- June 7
  - Jun 27 1
  - Jun 07 1
  - Jun 05 2
  - Jun 04 1
  - Jun 02 2
- May 10
  - May 25 1
  - May 22 1
  - May 20 1
  - May 19 1
  - May 13 1
  - May 11 2
  - May 10 1
  - May 02 1
  - May 01 1
- April 16
  - Apr 25 1
  - Apr 12 3
  - Apr 11 1
  - Apr 10 1
  - Apr 08 1
  - Apr 04 2
  - Apr 02 7
- March 9
  - Mar 31 1
  - Mar 30 1
  - Mar 26 1
  - Mar 20 1
  - Mar 17 1
  - Mar 15 1
  - Mar 06 1
  - Mar 05 1
  - Mar 03 1
- February 7
  - Feb 15 1
  - Feb 12 1
  - Feb 11 1
  - Feb 10 1
  - Feb 09 1
  - Feb 08 1
  - Feb 02 1
- January 7
  - Jan 29 1
  - Jan 23 1
  - Jan 19 1
  - Jan 14 1
  - Jan 10 1
  - Jan 09 1
  - Jan 04 1
2008 85
- December 7
  - Dec 29 2
  - Dec 28 1
  - Dec 25 3
  - Dec 08 1
- November 8
- October 3
- September 4
  - Sep 24 1
  - Sep 21 1
  - Sep 19 1
  - Sep 03 1
- August 3
- July 2
  - Jul 24 1
  - Jul 01 1
- June 10
  - Jun 28 1
  - Jun 21 1
  - Jun 12 1
  - Jun 09 1
  - Jun 06 1
  - Jun 05 2
  - Jun 04 1
  - Jun 02 2
- May 8
  - May 30 1
  - May 18 1
  - May 16 3
  - May 07 1
  - May 03 1
  - May 02 1
- April 13
  - Apr 22 1
  - Apr 19 2
  - Apr 10 1
  - Apr 08 1
  - Apr 07 1
  - Apr 06 1
  - Apr 05 1
  - Apr 04 1
  - Apr 03 3
  - Apr 02 1
- March 27
  - Mar 31 4
  - Mar 30 1
  - Mar 27 12
  - Mar 26 10

Show more Show less

Boden Fortress - A long time secret place in Sweden

During the first world war the secret Boden Fortress was completed with its five very huge forts blasted into mountains surrounding Boden city in northern Sweden. They all were abunded as late as in 1998. The Rödberget fort is now a major tourist attraction in Boden. Björn, SM0YUZ knows a lot of these places and he took me on a guided tour to some of them. Many photos can be seen here (sorry text in Swedish) and here you can read the fascinating story of Boden Fortress. Björn, SM0YUZ standing in front of the huge Stora Åberget fort. The ugly Radiobunkern in Boden Fortress is a historical site as it was from here in 1921 the first public broadcast programmes in Sweden were transmitted. Link to an article in a Swedish newspaper.

Airshow memory

On Saturday June 6, 1953, 57 years ago, there was a very big airshow over central Stockholm in Sweden. The city was celebrating its 700 years birthday. Leif, my twin brother, and I was on a hill top, Observatorielunden in the city center, staring with big eyes up in the sky. A huge Royal Swedish Airforce fleet of more than 600 (!) airplanes was flying in all kind of formations. Being nine years old at that time this sight was burned into our memories. (Photos by Yngve Norrvi) I do specially remember this little airplane tumbling above our heads. It was Lilldraken SAAB 210 making its public debut. A scaled-down jet fighter testbed for the double- delta concept in the development of the SAAB 35 Draken . The wingspan was 4.9 m and length 9.1 m. Top speed was 650 km/h. How to build a 1/72 scale resin model of Lilldraken see video here . (Photos copyright SAAB AB) After this show we became very interested in airplanes, building models etc.

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 spread spectrum part of it.

Powered by Blogger