Topband: inv. L

[Art Snapper]

I did not use a switch. They are both permanently connected at the
feedpoint.
73
Art NK8X

On Thu, Oct 20, 2016 at 12:09 PM, Marc Wullaert ON4MA <
marc.wullaert3 at telenet.be> wrote:

> Hello,
>
> Do you use a switch for this antenna? Of you use the same feedpoint?
>
>
> 73
> Marc on4ma
> ----- Original Message ----- From: "Art Snapper" <art at nk8x.net>
> To: "160" <topband at contesting.com>
> Sent: Thursday, October 20, 2016 3:16 PM
> Subject: Re: Topband: inv. L
>
>
> 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 <art at nk8x.net> 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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>>>
>>> _________________
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>>
>
>
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