Recognizing this is the "TOWER" reflector, nevertheless, the purpose/use of
the antenna system on the tower
must be paramount in importance, and in fact, determining the design.
For single op, all-band contesters, N4KG's offering is not optimal. Having
all antennas rotate together
would slow-down a single-op, all-band contester.
For single-band contests, this rotating tower works well.
Food for thought.
Bill, N3RR
----- Original Message -----
From: <n4kg@juno.com>
To: <TOWERTALK@contesting.com>; <ford@cmgate.com>
Sent: Friday, May 10, 2002 6:42 AM
Subject: Re: [Towertalk] Distance to tower
> Here's my idea for a single 160 ft tower:
>
> First, ROTATE the TOWER.
>
> Second, use fiberglass guy rod at 40, 80, 120, 160 ft.
>
> Antennas:
>
> 160 ft 2L40 plus 80M rotary dipole (at right angles)
>
> 120 ft BIG Tribander or 5 Bander
>
> 80 ft 2L40 (plus dipole for 30, or 2L30)
>
> 40 ft Tribander or 5 Bander
>
> Rationale:
>
> Stacked 2L40's at 160 / 80 ft provides as much gain as a 3L40
> on a 48 ft boom with much smaller booms. 80M dipoles play
> very well at 160 ft.
>
> 120 ft for high bands provides good low angle coverage AND
> the second lobe is placed at the upper end of the range of
> angles by the ionosphere.
>
> 40 ft for high bands is a GREAT Daytime height for the high
> bands and it fills in the NULLS of the higher high band antenna.
>
> A second tower (40 to 60 ft) with another tribander or 5 bander is
> useful.
>
> Above analysis assumes LEVEL Terrain.
>
> Tom N4KG
>
>
> On Thu, 9 May 2002 "Ford Peterson" <ford@cmgate.com> writes:
> > My antenna was destroyed last weekend. Bummer. Oh well, time to
> > rebuild.
> >
> > I'm thinking about 160' of Rohn 45. A 40 - 10 meter yagi will sit
> > at the top.>
> > Here's my problem. The ideal location is in a field on the west end
> > of the
> > property. Feedlines will be > 400' to shack #1 and over 600' to
> > shack 2.
> > Open lines are awfully bulky and would have to be strung over
> > driveways,
> > etc.
> >
> > Is this manageable with coax? Am I looking at preamps and hardline
> > as the
> > only option?
> >
> > I'm looking for ideas.
> >
> > Ford-N0FP
> > ford@cmgate.com
> >
> >
> >
> > _______________________________________________
> > Towertalk mailing list
> > Towertalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
>
>
> ________________________________________________________________
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> _______________________________________________
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> Towertalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
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