John Popelish wrote:
Tom Donaly wrote:

"Detecting Natural Electromagnetic Waves," The Amateur Scientist,
Shawn Carlson, Scientific American, May, 1996. 50,000 turns #30 wire
on 1/2 inch rebar, 2 feet long. You'll have to make your own amplifier
and low
pass filter.


Rebar has a horrible B-H curve, and low permeability. You would do
better with a length of black iron pipe that you annealed after you
sawed a slit in it, lengthwise, to reduce eddy current losses.

It's what Shawn Carlson used. He also used mu metal which he got from
Scientific Alloys in R.I. Much better, but pricey.
73,
Tom Donaly, KA6RUH