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
________________________________________
Van: [email protected] <[email protected]>
namens Chris Wilson <[email protected]>
Verzonden: maandag 26 juni 2017 12:35
Aan: Rik Strobbe
Onderwerp: Re: LF: Insulating a Versatower from ground
Hello Rik and Wolf,
Thanks for the replies. Rik, the coil shown in the illustration, that
would be my loading coil, right? Is the coil likely to need similar
inductance to what i have now with a verical into the corner of my
horizontal quad loop, which i would envisage retaining as a top hat?
Sunday, June 25, 2017, 7:02:49 PM, you wrote:
> Hello Chris,
> it is possible to use a non-isolated tower, see
> http://www.strobbe.eu/on7yd/136ant/#Tower
> 73, Rik ON7YD - OR7T
--
Best regards,
Chris mailto:[email protected]
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