Topband: Fwd: Re: inv. L

[K1FZ-Bruce]

I waterproof with silicon as best possible, and the most important  part is  make an upside down U turn in the coax at the end. Water does not "like" to flow up hill in most cases. 

 
73
Bruce-k1fz

On Thu, 20 Oct 2016 09:16:08 -0400, Art Snapper  wrote:

      I had a few hours free yesterday afternoon, so I began the dual 80/160
radiator inv. L project. 

In the process, I found that water had entered the coaxial center insulator
that was used at the feedpoint of the antenna. 

Does anyone have a favorite solution for a weatherproof, coaxial feedpoint
for this type of antenna???

The radials are attached to several load center ground bars, that are
screwed into a copper pipe that is driven into the ground. 

The pipe gives me a rigid mounting point for some kind of insulator or
standoff. 

BTW, after a temporary fix, I ran some quick SWR tests. There appears to be
very little interaction between the elements. At least from an SWR
perspective. 

de Art NK8X

ᐧ

On Mon, Oct 17, 2016 at 11:16 AM, Art Snapper  wrote:

> I was considering adding a second vertical element to my 160 inverted L. 
> This one would be roughly a quarter wave tall for use on 80. 
>
> I tried modelling in Eznec, but wasn't comfortable with the results. I may
> have screwed it up. 
>
> Has anyone tried it for real? Is it a big compromise on either band? Would
> a switch at the feedpoint have any benefit?
>
> My inverted L has about 50 radials. 
>
> 73
> Art NK8X
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