Szczepan Bialek wrote:
"One side of the antenna feedline is attached to the lower end of the
monopole, and the other side is attached to the ground plane, which is often
the Earth.

This contrasts with a dipole antennawhich consists of two identical rod
conductors, with the signal from the transmitter applied between the two
halves of the antenna.

Any comments?
Best Regards,
S*

Now you have written it yourself! With a dipole antenna you do not
need an earth connection because the signal is applied between the
two halves of the antenna, not between earth and the antenna.

End of discussion.

"Rob" napisal w wiadomosci
...
Szczepan Bialek wrote:
"One side of the antenna feedline is attached to the lower end of the
monopole, and the other side is attached to the ground plane, which is
often
the Earth.

This contrasts with a dipole antennawhich consists of two identical rod
conductors, with the signal from the transmitter applied between the two
halves of the antenna.

Any comments?
Best Regards,
S*

Now you have written it yourself! With a dipole antenna you do not
need an earth connection because the signal is applied between the
two halves of the antenna, not between earth and the antenna.

Real dipole needs:
"In the lower half of the mast, there was a vertical steel tube, attached to
the mast's outer structure with large insulators. This tube was grounded at
the bottom, and connected electrically to the mast structure by an
adjustable metal bar at 328 metres.[2] This technique allowed adjusting the
impedance of the mast for the transmitter and worked by applying a DC ground
at a point of low radiofrequency voltage, to conduct static charge to ground
without diminishing the radio energy. Static electrical charge can build up
to high values, even at times of no thunderstorm activity, when such tall
structures are insulated from ground. Use of this technique provides better
lightning protection than using just a spark gap at the mast feed, as is
standard at most mast radiators insulated against ground."
From: http://en.wikipedia.org/wiki/Warsaw_radio_tower

End of discussion.
S*

"Szczepan Bialek" wrote in message
...

Real dipole needs:
"In the lower half of the mast, there was a vertical steel tube, attached
to the mast's outer structure with large insulators. This tube was
grounded at the bottom, and connected electrically to the mast structure
by an adjustable metal bar at 328 metres.[2] This technique allowed
adjusting the impedance of the mast for the transmitter and worked by
applying a DC ground at a point of low radiofrequency voltage, to conduct
static charge to ground without diminishing the radio energy. Static
electrical charge can build up to high values, even at times of no
thunderstorm activity, when such tall structures are insulated from
ground. Use of this technique provides better lightning protection than
using just a spark gap at the mast feed, as is standard at most mast
radiators insulated against ground."
From: http://en.wikipedia.org/wiki/Warsaw_radio_tower

End of discussion.
S*
Good evening Szczepan.

The Warsaw radio mast was not a dipole.

May I remind you that I would appreciate an answer to my question "Are you
discussing resonant or non-resonant aerials, please?". It would help to
clarify what you have in mind,

Kindest regards;
have a good evening,
Ian.

"Ian" napisa³ w wiadomo¶ci
...
"Szczepan Bialek" wrote in message
...

Real dipole needs:
"In the lower half of the mast, there was a vertical steel tube, attached
to the mast's outer structure with large insulators. This tube was
grounded at the bottom, and connected electrically to the mast structure
by an adjustable metal bar at 328 metres.[2] This technique allowed
adjusting the impedance of the mast for the transmitter and worked by
applying a DC ground at a point of low radiofrequency voltage, to conduct
static charge to ground without diminishing the radio energy. Static
electrical charge can build up to high values, even at times of no
thunderstorm activity, when such tall structures are insulated from
ground. Use of this technique provides better lightning protection than
using just a spark gap at the mast feed, as is standard at most mast
radiators insulated against ground."
From: http://en.wikipedia.org/wiki/Warsaw_radio_tower

End of discussion.
S*
Good evening Szczepan.

The Warsaw radio mast was not a dipole.

"Large constructed half-wavelength dipole towers include the Warsaw radio
mast - the only half-wave dipole for longwave ever built."

May I remind you that I would appreciate an answer to my question "Are you
discussing resonant or non-resonant aerials, please?". It would help to
clarify what you have in mind,

It seems to me that you do not know what the word "resonans" means.
We are discusing the earth/chassis/ counterpoise and the field electron
emission.

Best Regards,
S*

"Szczepan Bialek" wrote in message
...

"
"Large constructed half-wavelength dipole towers include the Warsaw radio
mast - the only half-wave dipole for longwave ever built."

May I remind you that I would appreciate an answer to my question "Are
you discussing resonant or non-resonant aerials, please?". It would help
to clarify what you have in mind,

It seems to me that you do not know what the word "resonans" means.
We are discusing the earth/chassis/ counterpoise and the field electron
emission.

Best Regards,
S*
Hello Szczepan.
If you mean the Warsaw radio mast (
http://en.wikipedia.org/wiki/Warsaw_radio_mast ) then you are incorrect. It
was not a dipole. Do you mean another tower which supported a dipole aerial?

I assure you that I do know the meaning of "resonant". I need to know and
understand it in order to match my radio to my aerials.

Kindest regards, Ian.

Szczepan Bialek wrote:

"Rob" napisal w wiadomosci
...
Szczepan Bialek wrote:
"One side of the antenna feedline is attached to the lower end of the
monopole, and the other side is attached to the ground plane, which is
often
the Earth.

This contrasts with a dipole antennawhich consists of two identical rod
conductors, with the signal from the transmitter applied between the two
halves of the antenna.

Any comments?
Best Regards,
S*

Now you have written it yourself! With a dipole antenna you do not
need an earth connection because the signal is applied between the
two halves of the antenna, not between earth and the antenna.

Real dipole needs:

That is not a dipole. It is a vertical half-wave radiator. It is
not center fed like you discussed above.