Fw: Re: Fw: Fw: Re: [Antennas] 450 Ohm Ladder Line
Sandy and Kees Talen
[email protected]
2002年12月14日 20:14:09 -0600
That's right for HF, Harvey. The purpose of this exercise is to see what
can be done to minimize the effect on window ladder line in rain and
dew weather situations. I suspect the removal of web material will
only have a small (around 0.2dB per 100ft or less) influence when dry.
Wet is a different story.
73 Kees K5BCQ
--------- Forwarded message ----------
From: Harvey&Bessie <[email protected]>
To: Sandy and Kees Talen <[email protected]>
Cc: [email protected]
Date: 2002年12月14日 19:44:36 -0500
Subject: Re: Fw: Fw: Re: [Antennas] 450 Ohm Ladder Line
Message-ID: <[email protected]>
References: <[email protected]>
I would like to point out that the dielectric for purposes of impedance
calculation and loss in this line and others like it, is mostly air. The
webbing makes up only a small portion of the dielectric immersed in the
field surrounding the conductors. Only when wet does the webbing cause
any big problem.
Harvey/W4TG
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