Thanks, Joe.
3 of the lines go to a switch on the tower. Would a choke on the single line
from the switch to the shack be sufficient?
Mike
On Oct 9, 2014, at 4:20 PM, Joe Subich, W4TV <lists@subich.com> wrote:
>
> Since 1/4 wave slopers use the *tower* as the ground return, you will
> almost certainly need a second common mode choke at the base of the
> tower. Any antenna current on the tower will be coupled to the
> feedline where it runs parallel to the tower.
>
> In other words, if you are using a shunt fed tower, 1/4 wave sloper,
> N4KG reverse fed ground plane, etc., place common mode chokes on *all*
> feedlines *at ground level where they leave (the vicinity of the tower.*
>
> Even on a grounded tower, the feedlines strapped to/or running parallel
> have antenna currents both capacitively coupled to, and induced on the
> outside of the coax shield.
>
> 73,
>
> ... Joe, W4TV
>
>
> On 2014-10-09 3:01 PM, Mike Reublin NF4L wrote:
>> I wrapped the coax for my 1/4 wave slopers thru 6 toroids. The bundle hangs
>> so it touches the tower. Zat OK?
>>
>> 73, Mike NF4L
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