common mode current
 

"Boomer" napisal w wiadomosci
...

BTW Szczepan, I have a loop antenna for low band. The electrons go around
in a circle and I recycle them. This saves a huge amount on my electric
bill.

"I prefer to feed them directly with coax at a corner and situated in a
diamond configuration when hung verticle but, you can feed them in the
center of either side.
"A little known fact is that you can add a half wavelength of wire behind
the loop instead of the closed loop. This comes in handy where supports are
not abundant."

From: http://ku4ay.net/loop.html

The electrons oscillate in the loop and collide in the nodes.

In that places the voltage is doubled and the electrons jump off.

Somebody wrote here that the current radiate.

In all AC circuits the same current if flowing in the live conductor and in
the ground (return).

Can 0V radiate?

S*

common mode current
 

Szczepan Bialek wrote:
Somebody wrote here that the current radiate.

In all AC circuits the same current if flowing in the live conductor and in
the ground (return).

Can 0V radiate?

That is why it only radiates when the currents do not flow in the
opposite direction!

So, a balanced feeder line with two parallel wires carrying the HF current
(in opposite directions) does not radiate.

But in a dipole antenna, the currents in the two wires do flow in the
same direction. So a dipole radiates.

common mode current
 

On Thursday, July 12, 2012 3:30:02 AM UTC-5, Rob wrote:
But in a dipole antenna, the currents in the two wires do flow in the
same direction. So a dipole radiates.

Sorry, there are two currents, forward and reflected, flowing in opposite directions on a standing wave antenna. A 1/2WL dipole is a standing wave antenna where the SWR at the ends is infinite and the SWR at the feedpoint is ~20:1. There is forward and reflected wave energy flow on each element of the dipole. At the ends of the 1/2WL dipole the forward and reflected currents are 180 degrees out of phase and equal in magnitude so they phasor add to zero, i.e. a standing wave current minimum (null). Since the forward and reflected current phasors rotate in opposite directions, they are in phase at the feedpoint and phasor add (constructively interfere) to a standing wave current maximum (loop) and most of the radiation is from the center of the antenna.

The feedpoint impedance of a dipole is Zfp = (Vfor+Vref)/(Ifor+Iref) phasor math.
--
73, Cecil, w5dxp.com

common mode current
 

Szczepan Bialek wrote:

"Boomer" napisal w wiadomosci
...

BTW Szczepan, I have a loop antenna for low band. The electrons go around
in a circle and I recycle them. This saves a huge amount on my electric
bill.

"I prefer to feed them directly with coax at a corner and situated in a
diamond configuration when hung verticle but, you can feed them in the
center of either side.
"A little known fact is that you can add a half wavelength of wire behind
the loop instead of the closed loop. This comes in handy where supports are
not abundant."

From: http://ku4ay.net/loop.html

The electrons oscillate in the loop and collide in the nodes.

Electrons don't collide; you are a babbling idiot.

In that places the voltage is doubled and the electrons jump off.

Electrons don't jump off; you are a babbling idiot.

Somebody wrote here that the current radiate.

Nobody here wrote that; you are a babbling idiot.

In all AC circuits the same current if flowing in the live conductor and in
the ground (return).

Utter, meaningless, babble.

Can 0V radiate?

Voltages don't radiate; you are a babbling idiot.


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?

common mode current
 

On 7/11/2012 3:18 PM, Ian wrote:
"Boomer" wrote in message
...
Ian, I am pretty advanced in years. I am 69. I can remember a comedian
whose name escapes me. He got paid good money for coming on stage and
talking just like Szczepan. I think it would be a gas for him to address a
large gathering of amateur radio operators. He could have us all in
stitches in a few seconds.

I get a fair amount of entertainment value just reading his posts. Some of
them are laugh out loud moments for me. I don't know whether his is truly
that ignorant or is just having fun with us. It doesn't matter. He is
funny.

BTW Szczepan, I have a loop antenna for low band. The electrons go around
in a circle and I recycle them. This saves a huge amount on my electric
bill.

Michael

Michael

Hello Michael. From where I am sitting, 69 isn't all that old. I have
friends heading for 90 who are definitely not showing their age.
Was the comedian a Brit named Stanley Unwin or an American named Fred ???
73, Ian.



I just can't remember Ian.

Michael

common mode current
 

Boomer wrote:
On 7/11/2012 3:18 PM, Ian wrote:
"Boomer" wrote in message
...
Ian, I am pretty advanced in years. I am 69. I can remember a comedian
whose name escapes me. He got paid good money for coming on stage and
talking just like Szczepan. I think it would be a gas for him to address a
large gathering of amateur radio operators. He could have us all in
stitches in a few seconds.

[snip]
Michael

Hello Michael. From where I am sitting, 69 isn't all that old. I have
friends heading for 90 who are definitely not showing their age.
Was the comedian a Brit named Stanley Unwin or an American named Fred ???
73, Ian.

I just can't remember Ian.

Michael

Pretty sure you are talking about Professor Irwin Corey "The World's Foremost Authority".

http://www.irwincorey.org

He's 95 and still working - I'd hurry if you want him...

Brett

common mode current
 

In article ,
says...

Was the comedian a Brit named Stanley Unwin or an American named
Fred ???
73, Ian.



I just can't remember Ian.

Michael

Stanley Unwin's your man. Before he became a comedian, he was a BBC
transmitter engineer, so he was one of us...

http://www.stanleyunwin.com/home2.htm

By us, of course, I don't include Szczepan. My feeing is that he's
either :

1 Far gone with senile dementia OR
2 An academic troll who's been winding up Usenet groups for years

I think (2) is more likely - dementia is progressive, and I'd expect
Szczepan's ramblings to get gradually more and more incoherent. Instead
there is a strangely consistent quality to them.

Anyway, I killfiled him years ago.

common mode current
 

In message , Gaius
writes
In article ,
says...

Was the comedian a Brit named Stanley Unwin or an American named
Fred ???
73, Ian.



I just can't remember Ian.

Michael

Stanley Unwin's your man. Before he became a comedian, he was a BBC
transmitter engineer, so he was one of us...

http://www.stanleyunwin.com/home2.htm

By us, of course, I don't include Szczepan. My feeing is that he's
either :

1 Far gone with senile dementia OR
2 An academic troll who's been winding up Usenet groups for years

I think (2) is more likely - dementia is progressive, and I'd expect
Szczepan's ramblings to get gradually more and more incoherent. Instead
there is a strangely consistent quality to them.

So you don't reckon he could also be a computer, programmed to carry out
the Turing Test?

Anyway, I killfiled him years ago.

Where's the fun in that? In this sad world, we often need a bit of
light-hearted relief and amusement.
--
ian

common mode current
 

Gaius wrote:
In article ,
says...

Was the comedian a Brit named Stanley Unwin or an American named
Fred ???
73, Ian.



I just can't remember Ian.

Michael

Stanley Unwin's your man. Before he became a comedian, he was a BBC
transmitter engineer, so he was one of us...

http://www.stanleyunwin.com/home2.htm

By us, of course, I don't include Szczepan. My feeing is that he's
either :

1 Far gone with senile dementia OR
2 An academic troll who's been winding up Usenet groups for years

I think (2) is more likely - dementia is progressive, and I'd expect
Szczepan's ramblings to get gradually more and more incoherent. Instead
there is a strangely consistent quality to them.

Anyway, I killfiled him years ago.


Possiblility 3; he's not very bright and he's bat **** crazy.

common mode current
 

"Ian Jackson" napisal w wiadomosci
...
In message , Gaius
writes

Anyway, I killfiled him years ago.

Where's the fun in that? In this sad world, we often need a bit of
light-hearted relief and amusement.

I am here to learn. To learn English.
I do my best.
But I do not understand why in your antennas no electrons.
S*