"Token" ha scritto nel messaggio
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The antenna is electrically a half wave on 10M to 40M, the electrical
length of an element is not directly related to it's physical length.
That is how they make a "halfwave" in a stick shorter than a physical
quarter wave.

Ok... could you please explain me how i can build an, e.g., electrical half
wave for the 20 meters in a 3 meters stick ??

I repeat, i'm a great newbie on antenna theory and related arguments, so the
question i pose to you now is not ironic but really posted to increase my
knowledge, if is possible.

Thanks in advance also to other people that may contribute to this question.

-.-. --.-