Topband: Vertical choke needed?

[Artek Manuals]

True indeed Charlie

It was such an observation by accident that clued me into the fact that 
I needed a choke on a system with elevated radials the first time :)

Dave
NR1DX

On 1/1/2021 2:10 PM, n0tt1 at juno.com wrote:
> To offer another view.....IMHO
> Measure the impedance at the base of the antenna without the feedline
> attached in any way. While watching your instrument (259B, VNA, etc),
> touch the feedline *shield* to the radials at the base of the antenna.
> If your instrument shows
> no change in the impedance, the feedline shield isn't carrying "any"
> current
> and therefore doesn't need to be choked.
>
> 73,
> Charlie, N0TT
>
> On Thu, 31 Dec 2020 19:49:43 -0700 Wes <wes_n7ws at triconet.org> writes:
>> I have the same situation and no choke. IMHO the transmission line
>> is just
>> another random length radial. I don't have chokes on any of the
>> others either.
>>
>> Wes N7WS
>>
>>
>> On 12/31/2020 5:15 PM, Kenneth Silverman wrote:
>>> Hello, I have an inverted-L and the radials are laying on the
>> ground AND
>>> the coax is on the ground too with radials right near the coax
>> run. Do I
>>> need a choke to stop any feedline coupling/radiation, and if so,
>> where in
>>> the feedline?
>>>
>>> The antenna is in the woods so burying either the radials or coax
>> won't be
>>> easy.
>>>
>>> Many thanks, Kenny K2KW
>>> _________________
>>> Searchable Archives: http://www.contesting.com/_topband - Topband
>> Reflector
>>
>>
>> _________________
>> Searchable Archives: http://www.contesting.com/_topband - Topband
>> Reflector
>>
> _________________
> Searchable Archives: http://www.contesting.com/_topband - Topband 
> Reflector

-- 
Dave Manuals at ArtekManuals.com www.ArtekManuals.com


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