Hi Markus, What a genial report, i'm curious!! I just see your slow hell indoor transmission coming in here in Heidelberg: http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_LF_DX_Grabber.html Just
Today I have experimented with an indoor transmit loop for 136 kHz. First I attempted to measure the efficiency of a small test loop, 6 turns and 66 cm diameter. It was made from a 12.1 meter piece o