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.
In our quiet part of the village is this delightful green. One of the trees has half its leaves of a different colour.
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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