[HCARC] One last Question

[Gary and Arlene Johnson]

Curtis - Yea!!!  That is essentially what the antenna book says, but more 
clearly.   What problems to the transmitter does this cause - if any??  Does 
it work??

Gary J
N5BAA


----- Original Message ----- 
From: <curtiswe at ktc.com>
To: <curtiswe at ktc.com>; "Gary and Arlene Johnson" <qltfnish at omniglobal.net>; 
<hcarc-bounces at mailman.qth.net>; "Hcarc reflector" <hcarc at mailman.qth.net>
Sent: Monday, August 27, 2012 2:38 PM
Subject: Re: [HCARC] One last Question


> Example of how to do it: If I take the transmitter end of the ladder line 
> feeding my 80 mtr. Doublet, short them together and tie them to the wire 
> antenna terminal of my tuner, the whole thing becomes a top loaded marconi 
> working against the station ground system. This let's me get on 160 with 
> an 80-10 antenna.
> Sent from my BlackBerry® Smartphone by WCW
>
> -----Original Message-----
> From: curtiswe at ktc.com
> Sender: hcarc-bounces at mailman.qth.net
> Date: Mon, 27 Aug 2012 19:18:16
> To: Gary and Arlene Johnson<qltfnish at omniglobal.net>; 
> <hcarc-bounces at mailman.qth.net>; Hcarc reflector<hcarc at mailman.qth.net>
> Reply-To: curtiswe at ktc.com
> Subject: Re: [HCARC] One last Question
>
> The over simplified, not quite what really happens but useful for 
> illustration answer is; that the ground provides the missing half of an 
> antenna as a mirror image. Think of a pencil held perpendicular to a 
> mirror, it looks twice as long as it really is.
>
> What actually happens is that the ground provides a path for the return 
> currents in an incomplete or electrically  short antenna (compared to a 
> half wave dipole in which the currents are returned through the other 
> half).
>
> The conductivity of the ground plays an important role in determining the 
> efficiency of such an antenna. Most soil is not all that conductive. This 
> can be improved by adding a conductive screen such as radial wires, on or 
> just under the surface.
>
> That doesn't cover all of it but I hope it helps.
> Sent from my BlackBerry® Smartphone by WCW
>
> -----Original Message-----
> From: "Gary and Arlene Johnson" <qltfnish at omniglobal.net>
> Sender: hcarc-bounces at mailman.qth.net
> Date: Mon, 27 Aug 2012 13:18:46
> To: <hcarc at mailman.qth.net>
> Subject: [HCARC] One last Question
>
> What does it mean to "work an antenna against ground".  This is another 
> one of those seemingly innocuous statements I see in the antenna book.  It 
> assumes that everyone knows what "working against a ground" means.  Is it 
> the same as grounding an antenna??  If all antennas are to be grounded, 
> why make the statement??
>
> You usually see the statement in context like this "this antenna can be 
> used on 160 meters if worked against a ground".
>
> Gary J
> N5BAA
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