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Date: Fri, 14 Aug 2015 22:38:03 +0100
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From: Andy Talbot <andy.g4jnt@gmail.com>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: Re: RE: Folded monopole - Food for thought
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6dB more, not 3dB
Height squared

'jnt


On 14 August 2015 at 22:31, Alan Melia <alan.melia@btinternet.com> wrote:

> The problem with a monopole at LF is that the effective height is only
> half (approx) the physical height. For an inverted L where the top length
> is at least twice the height, the effective height is close to the physical
> height .....so 3dB more ERP. It may not matter so much on 160m (I used a
> 16foot centre loaded "tank-whip" at one time :-))  )  but where

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<div dir=3D"ltr">6dB more, not 3dB<div>Height squared=C2=A0</div><div><br><=
/div><div>&#39;jnt</div><div><br></div><div class=3D"gmail_extra"><br><div =
class=3D"gmail_quote">On 14 August 2015 at 22:31, Alan Melia <span dir=3D"l=
tr">&lt;<a href=3D"mailto:alan.melia@btinternet.com" target=3D"_blank">alan=
.melia@btinternet.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_q=
uote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1e=
x">The problem with a monopole at LF is that the effective height is only h=
alf (approx) the physical height. For an inverted L where the top length is=
 at least twice the height, the effective height is close to the physical h=
eight .....so 3dB more ERP. It may not matter so much on 160m (I used a 16f=
oot centre loaded &quot;tank-whip&quot; at one time :-))=C2=A0 )=C2=A0 but =
where=C2=A0</blockquote></div></div></div>

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