--- In topband-helical@..., "m0vey" <m0vey@...> wrote:
>
> --- In topband-helical@..., "m3iqq" <sireth@> wrote:
> >
> > Hi All.
> > I¡¦ve been a member of the site for some time now and have done a lot of
reading and not a lot of posting.... But I have a question ļ
> >
> > What is the ultimate wire length to construct a top band vertical antenna?
> > I currently have 146¡¨ of wire and a similar counter poise running down the
back of the gardens in my street ļ
> >
> > Should I aim to use a similar length of wire or should it be shorter ???
> >
> > Thanks Andy
> > 2e0bay
> >
>
> Hi Andy,
> I always use the formula of 468 divided by the frequency in mhz to
give the length of a half wave antenna. This would equate to 234 divided by the
frequency in mhz to give the length of wire needed for a quarter wave antenna.
>
> The question is, where do you want the antenna to be resonant ? If like
myself, you want an antenna for working in the " 160m DX Window " , then the
wire length would need to be around 126 & a half feet for the vertical element
& the same for a counterpoise.
>
> Hope this helps.
>
> Regards, Phil. M0VEY
>


Hi,
Thanks for the info, 126 feet sounds good to me.
The next question is will the size of the coil or its location up the mast make
any difference?
Thanks andy