ELF: Almost touching the ground... | 12.47 Hz

[DK7FC <selberdenken@posteo.de>]

Hi ELF friends,

During the last 2 weeks i've done another experiment on ELF, this time 
on 12.47 Hz, the 24 Mm band (wavelength 24057 km). Again i've crossed 
the local distance of 3.5 km. That's the lowest frequency i've ever been 
and it feels like i can see the ground already :-)
The dimensions of everything down there are extreme. I've integrated 227 
hours of a carrier transmission into one spectrum peak, it is shown in 
the attachment in 1.25 uHz. This carrier could have transferred an 
EbNaut message of nearly 100 characters.
The ERP was 50 attowatt or -163 dBW and the antenna current was 170 uA 
only, despite about 5 kV antenna voltage.
I'm now trying to put a step below 10 Hz but the RX antenna becomes less 
efficient with each Hz.
73, Stefan

12.47 Hz Carrier transmission.png
Description: PNG image