This will be an elevated 2 element phased vertical system using the Christman
design with 50 ohm feed lines.
Regards,
Mark, K1RX
> On Dec 2, 2024, at 6:18 PM, Jim Lux <jim@luxfamily.com> wrote:
>
>
>
>
>
>
> how deep is it buried? Skin depth of the soil at HF isn't zero (except for
> those folks with the array in a salt water marsh, and even there...), so the
> shield of the coax acts as a radial. Although the choke would affect that, as
> well since it chokes the current on the outside of the coax.
>
> One big advantage of feedline chokes is that they make the behavior of the
> overall system more "predictable".
>
>
> On Mon, 2 Dec 2024 14:49:44 -0500, <john@kk9a.com> wrote:
>
> I used a small diameter 75 ohm PTFE coax for the choke and shortened the
> feedline accordingly.
>
> I wonder of a ground mounted vertical with buried coax really needs a choke?
>
> John KK9A
>
>
>
> K1RX wrote:
>
> Building a set of phased verticals and the phasing lines are critical (of
> course) so my question here: by adding 18 inches of cable length (choke
> length) does the phasing line length need to be shortened by 18 inches?
>
> Or should I consider the choke as part of the antenna and not make any
> adjustments?
>
> Regards,
>
> Mark, K1RX
>
>
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