Tag Archives: Klaus Boecker

Guest Post: How To Convert Navtex from SVO Olympia Radio into an other languages

Many thanks to SWLing Post contributor, Klaus Boecker (DD2DR), who shares the following guest post:

Converting Navtex from SVO Olympia Radio into an other languages

by Klaus Boecker (DD2DR)

SVO’s NAVTEX transmission uses the Greek language in Latin letters.

Unfortunately, the Google translator can‘t translate Greek transmitted in Latin characters.
I found a German web site to convert the Latin letters (the complete text) to Greek letters.

After converting it is possible to use Google Translate to finish the translation.
So, it becomes more readable for people who are not familiar with the Greek language. 🙂

Use the following site to convert Latin letters to Greek letters:


Here is a step by step description:

Convert Latin letters to Greek letters:


After converting, it is possible to use Google Translate and translate the text to a language of your choice:


All the conversions/translations are not 100% perfect, but better than nothing.

Some frequencies used by the NAVTEX service from SVO Olympia Radio. Maybe this list is not complete.

Navtex frequencies SVO in kHz

  • 4209
  • 4214.5
  • 4216
  • 6314
  • 6325.5
  • 8416,5
  • 8421
  • 8424
  • 12586
  • 12590.5
  • 12603.5
  • 16585
  • 16815
  • 16818
  • 16830.5

73 de DD2DR Klaus

Many thanks for sharing your tutorial, Kaus! You’re right about Google Translate, too; it’s far from perfect, but generally conveys the overall meaning of the the message. 

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Klaus demonstrates his folding mag loop antenna

Many thanks to SWLing Post contributor, Klaus Boecker, who follows up after our recent post showcasing his homebrew magnetic loop antenna.

One of the cool things about Klaus’ antenna is that he can easily position it vertically (see above), or fold it over into a horizontal position (see below).

While one would think Klaus would get optimal performance from his loop while vertically-oriented, it’s not always the case. Klaus has discovered that on some frequencies, placing the antenna in the horizontal position lowers the noise level and increases the target signal’s strength.

To demonstrate, Klaus made the following short video for us:

Click here to view on YouTube.

That’s a pretty amazing difference, Klaus! I’m no antenna expert, but perhaps what’s happening is you’re eliminating noise that is polarized in the plane of your antenna, thus the signal “pops out” much better when oriented horizontally?

I’m curious if any readers can explain this.   I know very little about loop antennas–especially small loops since so much of their surroundings affect their performance.

Thanks for sharing, Klaus!

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Klaus’ magnetic loop antenna in “urban camouflage”

Many thanks to SWLing Post reader, Klaus Boecker, who originally posted these images of his homebrew magnetic loop antenna on the Shortwave Radio Station Listening Facebook page.

I love the design of his mag loop which easily allows for a vertical or horizontal orientation.  Kaus has discovered, in certain cases, places the loop in a horizontal position dramatically decreases the noise level.

Having a little fun with what I call “urban camouflage” Klaus recently decorated his antennas to match the neighborhood flower boxes!

I’m sure more than one neighbor may be wondering what sort of creative floral arrangement Klaus has planted! 

Klaus notes that the vertical to the left of the loop is a a 2m / 70cm J-Antenna.

Thank you again, Kalus, for allowing me to share your images here on the SWLing Post.  I imagine your modest home-grown antenna farm works some serious DX on occasion!

Thanks again for sharing!

Readers: Have you camouflaged or decorated your antenna(s)?  Please share your photos!

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