--- 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