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Old April 3rd 06, 01:01 AM posted to rec.radio.amateur.antenna
Ian White GM3SEK
 
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Default Current through coils

Yuri Blanarovich wrote:

"Ian White GM3SEK" wrote in message
The rest is just more of the same kind of name-calling. You didn't really
read what I wrote, and you don't really want to hear any answers. All you
really want is a shouting match. Well, tough, you don't get one.
--
73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek



Yep, when we try to argue the case, it ends up like this. So you know what I
read, but you would not want to explain, enlighten this "dummy" what is
going on, eh?


I already told you what is going on, the best and most accurate way I
know. It isn't easy, and it took some time to make it concise and
clear.

Your questions are based on a totally different way of looking at it,
much of which I don't even accept as valid. Unfortunately that means I
cannot answer them in any way that would make sense to me.


Uhm, the phase shift is different for current and different for voltage,


If you mean the phase differences across the coil, then this is one I
can answer: yes, that is exactly what I mean. The phase difference
across the coil is quite small for the current but much larger for the
voltage. This is normal behaviour for inductance. When current is being
pushed through an inductance into a small capacitance, it generates a
high voltage across the inductance, and also a large phase shift in that
voltage. That is the dominant feature when the inductance of your
real-life loading coil drives current into the relatively short top
section of the whip.


Can you draw the picture of current and voltage distribution in the case in
question or provide the file for EZNEC or whateverNEC?


I did some drawings in a RadCom article - and we could certainly use a
few diagrams here. It's late now and I have a tower to take down
tomorrow... get back to you later.



--
73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek
 
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