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Re: [TowerTalk] Ground mounting vs roof mounting verticals

To: <>
Subject: Re: [TowerTalk] Ground mounting vs roof mounting verticals
From: "AD5VJ Bob" <>
Date: Wed, 21 Oct 2009 23:26:08 -0500
List-post: <">>
Now you have my attention, I have a tuner. One built into the rig and another 
external for QRO.

I am thinking more and more 'try mikey you might like it' may be the way to go 
on this one. It is really no big deal to mount it --
take maybe a couple hours most.

No just to pray for no rain or wind.

I was going to do the TitanDX Vertical but it is so high profile that it has to 
be guide-off, the Butternut doesn't because it is
tapered in such a way that it catches very little wind.

Bob AD5VJ 

> -----Original Message-----
> From: 
> [] On Behalf Of jimlux
> Sent: Wednesday, October 21, 2009 11:16 PM
> To: Gary Schafer
> Cc:; 'AD5VJ Bob'
> Subject: Re: [TowerTalk] Ground mounting vs roof mounting verticals
> Gary Schafer wrote:
> > A vertical above your beam will not work. An elevated vertical must 
> > have resonant radials.
> > 
> > 73
> > Gary  K4FMX
> >
> or some other matching method, e.g. a tuner at the base.  
> Resonant radials just provide a reasonably nice resistive 
> impedance at the feedpoint.  There's not much difference in 
> "efficiency" of the radiator (defined as power radiated vs 
> power applied at feedpoint) as the length varies 10% or so 
> above or below resonance.
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