Robert Baer wrote:

Another degaussing coil, this one from a large TV.
21 inch diameter, kinks minimized.
AADE measures 9.11mH.
One of those "universal" kits that measures almost anything reads
16.8 ohms, 2.55mH.
Using a 0.1uF cap in parallel and driving that with square wave and
10K in series, rings at 9.5KC for 2.8mH
First, something like that will be affected by anything within FEET of the
coil. So, if you moved the coil to hook it to the instrument, the reading
could change.

Second, I see you state the test frequency is 80 KHz, with a bunch of close-
packed turns in a big coil like that, the parasitic capacitance is goign to
be a LOT, which might throw off some measuring instruments. A good bridge
should take that in stride, but some simple instruments might be fooled.

Jon