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Persinger/god helmet
Refs. xxn.org.uk:
http://xxn.org.uk/doku.php?id=brain_writing:calculations&s[]=wagner
http://xxn.org.uk/doku.php?id=geomagnetic_writing:berlin_tempelhof_theory&s[]=tempelhof
Aiming now for around 1uT=0.01 gauss (10 milligauss). To be acheived by trial and measurement.