[TowerTalk] antenna choices for K4XS

[Doug Renwick]

>From my CL-33 manual that I have on file:
"You can use a R.F. Choke if you want to ensure keeping R.F. off the outer
shield of the coax.  This can be simply made by coiling 5 turns of your feed
line into a 6" diameter as close as possible to the attachment point of the
PL-259."

Doug


-----Original Message-----


You may think that, but Mosley's documentation does not say so.
How many inexperienced antenna builders know enough to ignore
what the manufacturer says?

73,

   ... Joe, W4TV


On 2015-04-19 11:48 AM, Roger D Johnson wrote:
> It stands to reason that you would remove the grounding strap when using
> a balun.
>
> 73, Roger
>
>
> On 4/19/2015 11:43 AM, Joe Subich, W4TV wrote:
>> On 2015-04-19 11:20 AM, Kevin Stover wrote:
>> > A balanced feed point fed with unbalamced line needs a choke or 1:1
>> > balun or you get feedline radiation and screwed up pattern from
>> > common mode current on the coax shield.
>>
>> Mosley's TA series antennas are not balanced feed points.  They strap
>> one side of the driven element to the boom - that severely unbalances
>> the antenna *even if one uses a balun or choke*.  Depending on the
>> antenna height (impedance of the tower at the antenna DE), it may be
>> nearly impossible to make a choke work properly and keep the feedline
>> and/or tower from radiating.
>>
>> 73,
>>
>>    ... Joe, W4TV


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