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Old March 8th 06, 11:41 AM posted to rec.radio.amateur.antenna
Ian White GM3SEK
 
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Default Current through coils

wrote:

Do you agree or disagree with my post about how an inductor behaves?


I disagree with you about how an inductor behaves in a standing
wave environment. I agree with Walter Maxwell who said:
"If an inductance is in series with a line that has reflections, the
current will NOT be the same at both ends of the inductor."


Then we can't go further with this Cecil, unless you can accurately
explain WHY the behavior of an inductor changes when it is in an
antenna, rather than in some other system where impedances are the same
or very similar. It seems that Ian, Reg, Roy, and several others
including myself all believe an inductor works the same way.


And also, if the inductively loaded antenna is designed by the "antenna
as transmission line" method (as used by Boyer and ON4UN for example) it
clearly shows that the loading inductance is simply there to cancel the
net capacitive reactance - in other words, it behaves in exactly the
same way as you would in any other circuit.

The irony is that Boyer *does* use the concept of reflected traveling
waves in his basic explanation of how monopole antennas work. The
difference is that he understood how to do it without tying himself in
knots.

'Antenna Transmission Line Analog: a key to understanding antennas' by
Joseph M Boyer (W6UYH, SK 1988). Ham Radio, April 1977 and May 1977.


If you
convince one of us we are in error the others will surely follow!

Slip of the fingers there, Tom - there aren't any "followers" in that
particular company. We are all fiercely independent-minded individuals,
absolutely determined to do our own thinking and to get it right.

It is true that we agree on a lot of things, but there's only one reason
for that: because physical reality is the same in Oregon, England and
Scotland as it is in Georgia. There is a very high probability that it's
the same in Texas too.



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


 
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