Electromagnetic Field Detector #2: This circuit
is sensitive to low frequency electromagnetic
radiation and will detect for example hidden wiring
or the field that encompasses a transformer. Pickup
is by a radial type inductor, used as a probe which
responds well to low frequency changing magnetic and
electric fields. Ordinary headphones are used to for
detection. The field that surrounds a transformer is
heard as a50 or 60Hz buzz.
Magnetic Gun: When optimally tuned, it will
propel a small slug about 1.5 meters high, or 2.5
metres horizontally