VLF using Winradio, Spectrum Lab, 30x3m EWE & 100m BOG
Below you will find a few waterfalls of the 20 ..140 kHz range made in May 2007
(The last two look quite beautiful, almost kind of "art")

These frequencies were found around noon

kHz
dBm

19.6
23.4
37.25
52.0
60.0
62.55
65.8
77.5
81.0
82.75
129.0
131.8
133.2
135.4
138.9
144.6
147.3

**
-50
-70
-90
-80
-80
-90
-75
-76
-76
-66
-55
-50
-45
-58
-70
-54

 
** only occasionly active, not around noon, but around midnight  


 23,4 KHz zoomed in














Other Resources
Radio Waves Below 22 kHz  



  ©  3S design GmbH   Zeiterfassungs-Systeme   Zugangskontrolle-Systeme   BDE-Systeme   Ferienwohnung südliche Nordsee