[TowerTalk] Compromise Vertical antenna ground system?

[Guy Olinger, K2AV]

The narrowing of bandwidth away from ground and the broadening of the
bandwidth as the antenna is lowered is the hallmark of increasing ground
losses. Which is another reason why I am going to give it another
chance, with a ground screen (set of radials) underneath.

I want to be able to listen on other bands when calling CQ, and don't
have the real estate to get the separation using means other than cross
polarization.

I put in the cap for the low end of 80. It IS really narrow.

- - . . .   . . . - -     .   . . .     - - .   . - . .

73, Guy
k2av@contesting.com
Apex, NC, USA

----- Original Message -----
From: Greg Gobleman <k9zm@frontiernet.net>
To: <towertalk@contesting.com>
Sent: Monday, August 21, 2000 9:38 PM
Subject: Re: [TowerTalk] Compromise Vertical antenna ground system?


>
> I did work a few stations in Europe on 80m with my Gap Titan.  But I
sure
> wouldn't recommend it.  You have to order the antenna for the 100kHz
portion
> of the band you wish to work also.  It is not adjustable on that band.
They
> change a capacitor in the very top of the antenna for the portion you
wish
> to use.  Tuners are not recommended when using full power.  You can
wipe out
> the cap.
>
> On other bands, it seemed to work well for a multiband-one feedline
antenna.
> Sometimes you can crush a pileup and sometimes they seem deaf to you.
Mine
> worked best mounted near the ground.  When 12ft in the air it shifted
> resonance on 40 & 80m and narrowed the bandwidth.  But worked better
on 10,
> 12 & 15m during the low point in the sunspot cycle.
>
> 73
> Greg K9ZM
>
>
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