Tom:
I got my first 250 or so countries with a little old Mosley TA33Jr. on top of 40
ft. of Rohn 25 (with a Yaesu FL2100B occasionally pumping out 600 watts) that
just peeked over the top of the hill my QTH was at the bottom of. When I
changed
QTHs I got a 50 foot crankup and a slightly longer boom length tribander and the
new QTH was about 60 ft higher than the old one and I've got a clear view of the
horizon at least in all directions.
As an aside a friend of mine who lived about 25 miles away had a 50 foot crank
up
and a Telrex TB6EM when I had the TA33jr. All the extra aluminum he had in the
air meant he often heard stations when he was cranked DOWN to 20 ft just above
his rooftop that I couldn't hear at 40 ft. A couple antenna books say that
boomlength often helps. The boom on his Telrex was 24 ft. I think and mine at
the time was 12 ft.
Tom, WW5L
n4kg@juno.com wrote:
> N4KG response below.
>
> On Mon, 10 Dec 2001 Tom Anderson <ww5l@gte.net> writes:
> >
> > Fellow TTers:
> >
> > I once stopped by a QTH in Houston to pick up a radio for a friend
> > in Dallas and
> > the ham that had been repairing it had a 6 element triband beam at
> > 105 feet. He
> > had no problem working anyone further away than 2,000 miles, but
> > couldn't work
> > anyone any closer, he said. He had worked everyone in the eastern
> > hemisphere,
> > but hardly anyone in the western hemisphere. He said he couldn't
> > never work any
> > of the Caribbean island countries or anything closer than Argentina
> > in South
> > America. I mentioned he should just put up a small ring rotator
> > with a small 3
> > element beam at 60 feet or so and his sigs wouldn't go over the top
> > of anyone
> > closer.
> >
> > Don't know if he ever took my advice.
> >
> > Tom, WW5L
> >
>
> As most readers know, I've been preaching that everyone
> needs BOTH High and Low antennas to cover ALL the angles
> supported by the ionosphere. IMHO, everyone would benefit
> by having a good tribander (or separate monobanders) at
> 40 ft in addition to higher antennas. A 40 ft high horizontally
> polarized antenna will cover up to 20 degrees on 10M, 30 degrees
> on 15M, and 40+ degrees on 20M which fills in the NULLS
> of higher antennas for the high angle openings and close in
> stations. During the SS, my 40 ft high TH7 was 10 to 20 dB
> louder into W1,2,3 (500 to 800 miles) than my 4L15 at 55 ft
> and my 3L20 at 75 ft.
>
> Tom N4KG
>
> ________________________________________________________________
> GET INTERNET ACCESS FROM JUNO!
> Juno offers FREE or PREMIUM Internet access for less!
> Join Juno today! For your FREE software, visit:
> http://dl.www.juno.com/get/web/.
>
> List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
> Trylon Titan towers, coax, hardline and more. Also check out our self
> supporting towers up to 100 feet for under $1500!! http://www.anwireless.com
>
> -----
> FAQ on WWW: http://www.contesting.com/FAQ/towertalk
> Submissions: towertalk@contesting.com
> Administrative requests: towertalk-REQUEST@contesting.com
> Problems: owner-towertalk@contesting.com
List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 100 feet for under $1500!! http://www.anwireless.com
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
|