Sent from my wireless communicator
On Tue, Sep 11, 2018, 3:36 PM Jim W7RY <jimw7ry@gmail.com> wrote:
> What about capacitance per foot?
>
>
> 73
> Jim w7ry
>
>
>
> Sent from my wireless communicator
>
> On Tue, Sep 11, 2018, 2:27 PM Guido Tedeschi <guidoted@gmail.com> wrote:
>
>> I built an 80m DX special dipole.
>>
>>
>> http://1vc.typepad.com/ethergeist/2011/01/a-broadband-contest-antenna-for-80m.html
>>
>> I used the Messi & Paoloni BROAD-PRO 50/C cable instead of RG213
>> (https://messi.it/dati/immagini/BROAD-PRO50-All6_EN.pdf).
>>
>> The cable lenghts are recalculated for a velocity factor of 0.85 instead
>> of 0.66 and the overall lenght (cables plus wires) is the same of the
>> original project, but the result is not satisfactory.
>>
>> The SWR pattern is correct but it is like having an offset of about 2:
>> the two lower dips have an SWR of about 2 and the highest SWR on band
>> reach 3
>>
>> What could be wrong?
>>
>> Is it necessary to use a cable with 0.66 velocity factor?
>>
>> Thanks and 73
>>
>> Guido, ik2bcp
>>
>>
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>
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