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*

It was NEVER true; Marconi was wrong.

Here's a news flash for you:

A lot has been learned about radio since Marconi.

The radios on Pioneer 10 worked just fine 12,000,000,000 km from the Earth.