An amateur in Germany, DL3IKE, found this recently:
https://www.cia.gov/library/readingroom/docs/CIA-RDP78-03424A000400090001-9.pdf
22 Jun 2018
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Simple QRP projects, 10m, 8m, 6m, 4m, FT8, 160m, WSPR, LF/MF, sub-9kHz, nanowaves and other random stuff, some not related to amateur radio.
At the moment there is an exhibition doing the rounds in the UK. At the moment it is in our church in Burwell. It shows stories from the Bib...
1 comment:
Looks like 136Khz should do well but my own earth rod tests at this freq never produced much of note, but I don't have the luxury of 100m spacing nor a well!
73 Ken G4APB
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