In the back of the plane there is a small bucket of soil with a ground
rod stuck in it. At each stop they check to make sure the soil is
damp enough to provide sufficient conductivity. On occasion a
little salt is added. The ground rod is connected to the frame of
the plane using an MFJ Artificial Ground to further ensure that
all is well. As well, the bucket is grounded to prevent any
possible cathodic action from interfering with the system.
:-)

Irv VE6BP


"NM5K" wrote in message
...
On 4/10/2012 3:22 AM, Szczepan Bialek wrote:
In 1909 Marconi wrote:
http://www.nobelprize.org/nobel_priz...ni-lecture.pdf

"The necessity or utility of the earth connection has been sometimes
questioned, but in my opinion no practical system of wireless telegraphy
exists
where the instruments are not connected to earth."

It is still true?
S*


Pilots have no trouble using radios at 45,000 ft.
I've never yet seen one require a ground wire.

"Houston, Tranquility Base here. The Eagle has landed,
and we are talking to you via radio, even though we
are not connected to earth, and Marconi said it would
lead to celestial mayhem if we were to even try."

Houston, I we have a problem...