Topband: Vertical choke needed?

[Jim Brown]

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 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.