Topband
[Top] [All Lists]

Re: Topband: Vertical choke needed?

To: topband@contesting.com
Subject: Re: Topband: Vertical choke needed?
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Fri, 1 Jan 2021 11:54:01 -0800
List-post: <mailto:topband@contesting.com>
The logic is good, but most instruments are probably not sufficiently sensitive to see the difference.

73, Jim K9YC

On 1/1/2021 11:10 AM, n0tt1@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.

_________________
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

<Prev in Thread] Current Thread [Next in Thread>