[TowerTalk] Can take-off angle be too low?

[Guy Olinger, K2AV]

The story you tell is too one-sided. Check 80' antenna, feedline...
particularly feedline if your SWR is wonderfully low all across the
bands.

-----------------

Guy Olinger
Apex, NC, USA

----- Original Message -----
From: <n4kg@juno.com>
To: <TOWERTALK@contesting.com>; <cdietz@swbell.net>
Sent: Sunday, December 10, 2000 12:43 PM
Subject: Re: [TowerTalk] Can take-off angle be too low?


> Here we go again.
>
> I find that my TH6 at 80 ft is the absolute WORST
> performer of all my antennas on 10M, including
> a TH7 at 40, TH3 at 40 ft fixed SE, 5L10 at 60 ft,
> and 5L10 at 35 ft fixed on EU.
>
> The 80 ft high TH6 is NEVER better than any
> of the other (lower) antennas on 10M.
>
> On 15 and 20M, the TH6 at 80 ft sometimes is
> a good band opener and closer but is usually
> not as good at the TH7 at 40 ft or 4L15 at 55 ft
> when the band has opened up.
>
> During midday, the 40 ft TH7 is often the best
> antenna on 20M and still not a bad performer
> at night.  I never bother to move a higher antenna
> to Africa where the low TH7 works all.
>
> For domentic contests, an 80 ft high antenna
> has a null at 600 to 1000 miles on 20M.  My TH7
> at ft 40 is typically 20 to 40 dB stronder into
> W1, 2, 0 than the 80 ft high TH6.
>
> de  Tom  N4KG in North Central Alabama
>
> (300 miles south of Indianapolis,
>   20 miles south of Tennessee,
>   60 miles east of Mississippi)
>
> ////////////////////////////////////////////
>
> On Sat, 04 Nov 2000 Logan <cdietz@swbell.net> writes:
> >
> > > On Thu, 29 Jun 2000  "Tonno Vahk" <tonno.vahk@hansa.ee> writes:
> > > >
> > > >
> > > > How important is it to have the ability of running very low
> > > > elevation angles in upper HF contesting?
> >
> > The prevailing wisdom is high antennas open and close the band...Low
> > antennas when it is wide open.
> >
> > In Texas for the path to Europe if one only could have one antenna,
> > 75
> > feet would be best on 10-15-20 meters.  I understand this height is
> > about 55 feet on the East Coast of the US.
> >
> > I do a lot of contesting on 10 meters and 75 feet is certainly the
> > "bread and butter" (best overall) height to Europe from here.  From
> > this
> > statistic, and since Texas is the center of the World...Well, about
> > the
> > center of the US for Europeans...I would think 75 feet would be the
> > best
> > height for a single antenna for working the most US stations in a
> > contest.
> >
> > That's my story and I'm stickin too it!
> >
> > Chuck, W5PR
> > ex: KZ5MM
>
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