Home-page of amateur radio station


Previous callsign:

PA3BSH (17/07/1981 – 06/08/2003)

Please E-mail to: pc4m@amsat.org


Welcome on my site, the main topic is ham-radio and LF radio signals.
Last update 2003-aug-20.




[my map]

The 136kHz Amateur Radio band can be found in the Low Frequency part of the radio spectrum as indicated in the diagram below. This is a spectral measurement from actual LF radio signals. Each signal shows as a vertical line. The length of each line is a measure of the signal strength.

You can enlarge the picture by double-clicking on the picture.

Communication in the 136 kHz band is mainly done by Morse code telegraphy (CW or A1A) both by hand or very slowly (QRS CW). Slow morse code telegraphy can be decoded by computer using FFT (Fast Fourier Transform) software like Spectogram (see the link below for more information).

SOLAR ECLIPSE august 11th. 1999

Information about the effect of the solar eclipse on the propagation of Low frequency

radio signals can be found here:


And also on:                       http://www-nrpp.rcru.rl.ac.uk/RA_site/project48/infosheet.htm


You can find links here to: 


Information on settings for Spectogram 5.0.8. software

and QRS CW signal reception on the136kHz Amateur Radio band



More spectograms from Low Frequency radio signals

and 136kHz signals can be found here:




A tribute to the formal Dutch coast radio station Scheveningenradio.



General info and PA3BSH Amateur Radio station description.




The VERON site.