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Old March 10th 04, 04:59 PM
Reg Edwards
 
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Cec, I don't doubt your experimental results. It's your extrapolated
imagination and logic which worries me. ;o)
----
Yours, Reg.


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Old March 10th 04, 06:39 PM
Cecil Moore
 
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Reg Edwards wrote:
Cec, I don't doubt your experimental results. It's your extrapolated
imagination and logic which worries me. ;o)


I didn't imagine those experimental results, Reg, and all I did was
report those results. My logic tells me that there is a grain of
valid circumstantial evidence in there somewhere.

What you need to do to prove your point is present an antenna where the
high-current portion is prohibited from radiating yet still yields a
high field strength.

Example #1: The top half of an electrical 1/4WL antenna is prohibited
from radiating by a balanced top hat. Field strength results are
similar to a 1/4WL monopole. This has already been presented.

Example #2: The bottom half of an electrical 1/4WL antenna is
prohibited from radiating by _________________. Fill in the blank
and prove that field strength results are similar to a 1/4WL monopole.
That's all you need to do to make a believer (instead of a doubter)
out of me.
--
73, Cecil http://www.qsl.net/w5dxp



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Old March 10th 04, 07:14 PM
Reg Edwards
 
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Its the voltage parts of the antenna which do the radiating.

That is proved by cutting off the top part of the antenna and replacing it
with a top hat which has a much larger capacitance so it radiates the power
harder.
---
Reg.


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Old March 10th 04, 07:51 PM
Cecil Moore
 
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Reg Edwards wrote:
Its the voltage parts of the antenna which do the radiating.

That is proved by cutting off the top part of the antenna and replacing it
with a top hat which has a much larger capacitance so it radiates the power
harder.


Reg, let's say we have an elevated antenna system where the radial system
and top hat system are identical and balanced. Energy flows back and
forth between the radials and top hat. Very little energy is radiated
from either the top hat or the radials since they are balanced. Virtually
all of the radiated energy comes from the high-current vertical portion
of the antenna.

Such antennas are described in Appendix II - Short Ground-Mounted Verticals
in _Building_and_Using_Baluns_and_Ununs_ by Jerry Sevick, w2fmi.
--
73, Cecil http://www.qsl.net/w5dxp



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Old March 10th 04, 07:59 PM
Reg Edwards
 
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Cec, who's Jerry Sevick. I don't seem to have a copy of his works around me
at present.
---
Reg.




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Old March 10th 04, 08:34 PM
Cecil Moore
 
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Reg Edwards wrote:
Cec, who's Jerry Sevick. I don't seem to have a copy of his works around me
at present.


He's accepted by most as *the* ham balun guru. Some disagree.
--
73, Cecil http://www.qsl.net/w5dxp



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Old March 10th 04, 10:57 PM
Walter Maxwell
 
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On Wed, 10 Mar 2004 14:34:38 -0600, Cecil Moore
wrote:

Reg Edwards wrote:
Cec, who's Jerry Sevick. I don't seem to have a copy of his works around me
at present.


He's accepted by most as *the* ham balun guru. Some disagree.


Yeah, I'm one who disagrees!

Walt, W2DU
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Old March 10th 04, 11:20 PM
Reg Edwards
 
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He's accepted by most as *the* ham balun guru. Some disagree.
======================

How can anybody make himself a guru about such a simple, inactive, mundane
device as a balun?

Now if it was a conjugate match!


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