If length is limited, you can always add a wire from the top to any distance
point. This way you will create an "Inverted L" antenna covering much lower
bands.
73, Maximo
<http://foro.ea1ddo.es/>
________________________________
De: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Enviado: martes, 18 de diciembre de 2018 13:52
Para: towertalk@contesting.com
Asunto: RE: [TowerTalk] Rooftop tower as Vertical Antenna
If the tower is insulated at bottom, you can get a vertical antenna.
You just need to add some radials, better option are "elevated radials", and
your remote tuner.
73, Maximo
<http://foro.ea1ddo.es/>
________________________________
De: TowerTalk <towertalk-bounces@contesting.com> en nombre de Wes Stewart
<wes_n7ws@triconet.org>
Enviado: martes, 18 de diciembre de 2018 13:41
Para: towertalk@contesting.com
Asunto: Re: [TowerTalk] Rooftop tower as Vertical Antenna
Since you must have some grounding conductors connected to the tower for
lightning protection, "insulated" from the roof isn't insulated from ground.
You don't say what band(s) you might be interest in, but I don't see an easy way
to utilize this for much of anything other than holding up your tribander.
Wes N7WS
On 12/18/2018 5:19 AM, Edward via TowerTalk wrote:
> Trying to be creative with my space/visual limitations. I have a Glen Martin
> 18’ tower/10’ mast, with tribander and V/UHF Discone, atop of a 35’ roof. The
> tower legs are on concrete blocks, insulated from the roof.
>
> Thinking about using the tower as a vertical. I have a remote tuner I can use
> at the base. Can throw out a few resonant radials, too. Thoughts? Advice?
>
> 73,
> Ed NI6S/7Z1ES
> _
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