Okay so how do you route the coax back to the mast from the driven element
then? Dangle the coax below the mast? Add another choke at the mast? But
wait! The mast is metal too! Just how much of a problem is this stray C,
anyway?
Chris
KF7P
On May 14, 2013, at 2:50 PM, Tom H Childers wrote:
>
>
> One reason those folks, which has included me have done that, is
> because most loaded Yagi-Uda antennas sold by CushCraft and others
> recommend doing just that in the assembly instructions!
>
>
>
>
> On Tue, 14 May 2013 20:28:54 +0100, "Ian White"
> <gm3sek@ifwtech.co.uk> wrote:
>
> [snip]
>>> How many times have you seen a coiled-coax choke taped
>>> to a boom - think about that in terms of a high-Q parallel tuned circuit!
>>>
>> Not only that, but taping the choke to the boom is adding extra capacitance
>> between one side of the driven element and the boom. In other words, taping
>> the "choke balun" directly to the boom is making the antenna more
>> UNbalanced! It's amazing to watch people doing this...
>>
>>
>> 73 from Ian GM3SEK
> [snip]
> 73,
> Tom
> Amateur Radio Operator N5GE
> ARRL Lifetime Member
> QCWA Lifetime Member
>
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