-----Original Message-----
From: Guy Olinger K2AV
Sent: Friday, September 16, 2011 9:03 AM
To: TopBand List
Subject: Topband: Effect of current max not at base of vertical.
This is an answer to an off reflector conversation, relating to a "too long"
electrical length over radials reducing performance. I am writing to the
list since the subject and it's objection occur in so many posted
conversations. Reduction of gain by too high current max has been touted by
some and called myth by others.
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OK Guy,
Please explain in a comparative sense to the examples presented in your
post, the 1/2 wavelength verticals (vertical dipoles) used at WWV where the
maximum current is raised to near 3/8 WL AGL.
Inquiring minds would like to know why WWV would utilize this configuration
of vertically polarized antenna vs the "Gold Standard" 1/4 WL you describe.
It would seem the illumination of the ground from the center fed 1/2 WL
vertical dipole would present an extreme example of additional ground
losses. Yet we all know from experience that the WWV radiation performance
is excellent.
Thanks for your time in making this requested comparison and presenting your
view.
Milt, N5IA
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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