Szczepan Bialek wrote:

"Rob" napisa? w wiadomo?ci
...
Szczepan Bialek wrote:

napisa3 w wiadomo?ci
...
Szczepan Bialek wrote:


In AC electrons oscillate. In DC electrons are flowing for ages.
Where they come from?

No; in AC electrons periodically change directions and in DC electrons
flow in one direction only.

An antenna is a device that converts the electromagnetic energy which
antenna intercepts
into AC electrical energy at it's terminals.

A diode converts AC into DC.

The crystal radio antenna has only one terminal. Before the diode is AC.
After the diode is DC.
Where electrons come from?
S*

There should always be a DC path around the diode, or the crystal radio
will not work.

Normally there is a tuned circuit at the input, which consists of a
coil and capacitor in parallel. The DC flows through the coil.

"The wire antennas used with crystal receivers are monopole antennas which
develop their output voltage with respect to ground. They require a return
circuit connected to ground (earth) so that the current from the antenna,
after passing through the receiver, can flow into the ground."

Unnormally you can have only the monopole antenna and the diode and ground.

What current is flowing between the diode and the ground?
Is it dependent on the distance from the transmitter?
S*

You are an ignorant, babbling, ineducable idiot who knows absolutely
NOTHING about anything.

An antenna is a device that converts the AC electrical energy at it's
teminals into electromagnetic energy which radiates from the antenna
and also coverts the electromagnetic energy which antenna intercepts
into AC electrical energy at it's terminals.

Since an antenna is defined in terms of it's terminals, anything that
may be connected to the terminals, such as a balun, transmission line,
or diode has NOTHING to do with what the antenna is or how the antenna
operates.

What that also means is the current flows between the antenna terminals no
matter what type of antenna it is.

How many antennas have you built in your lifetime?

Why do you refuse to answer the question?

Is it because you have built zero antennas and you are trying to say all
the people that have successfully built hundreds that they are all wrong
and you don't want to admit you are an ignorant, inducable, idiot?

Why can't you obtain and read a university level textbook on anything
in any language?

Is it because you are too stupid to be able to understand the material?