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Szczepan Bialek wrote:

There is wrote that all of your transmitter have "a "ground" connection
without any actual connection to the Earth."

Nope, you just don't understand what is meant.


In the days of wired electronics, the chassis was the metal box the
equipment
was built in and used as a common return, i.e. what is called ground but
has no relationship to the Earth. By convention it was mearly the common
connection point for the most negative voltage.

In todays world of circuit boards, there is often no chassis.

Most portable equipment these days is a circuit board in a plastic box.

"This is usually a
large conductor attached to one side of the power supply (such as the
"ground plane" on a printed circuit board) "

No chassis.

No ground, as in to the Earth, connection.

The "large conductor" works as the earth.
S*