Re: LF: Insulating a Versatower from ground

[Chris Wilson <dead.fets@gmail.com>]

Hello Rik,

Thanks  for  the  info Rik, appreciated, I am trying to keep the setup
looking  discrete  and  wonder  if  an  up  aloft  loading  coil might
compromise that, so will have a play with the coil on the ground, I am
finding  it fascinating trying to optimize the grounds and the aerial,
but  have  to  stay within bounds of not upsetting `er indoors and the
neighbours too much :(

Monday, June 26, 2017, 2:59:19 PM, you wrote:

> Hello Chris,

> I guess it will be more or less the same.
> The setup as in the right picture has the loading coil at ground level, easy 
> to tune.
> Placing the coil at the top of the tower (picture at the left) will
> require a slightly larger coil, as the vertical wire capacitance
> will not count. It migh be also inconvenient for tuning.
> On the other hand a elevated loading can improve the antenna, in
> particular if you have a lot of greenery (bushes, trees) close to
> the antenna. I had very good experience with an elevated loading
> coil on 137 kHz, keeping a smaal part at ground level to ease tuning
> (see http://www.strobbe.eu/on7yd/136ant/indtop.htm).

> 73, Rik  ON7YD - OR7T 


> --
> Best regards,
>  Chris                            mailto:dead.fets@gmail.com






-- 
Best regards,
 Chris                            mailto:dead.fets@gmail.com