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Re: Topband: Ideas for xmit antennas for new QTH in KH6

To: Cqtestk4xs@aol.com, Topband <Topband@contesting.com>
Subject: Re: Topband: Ideas for xmit antennas for new QTH in KH6
From: Herbert Schoenbohm <herbs@vitelcom.net>
Date: Fri, 11 Dec 2015 13:53:01 -0400
List-post: <topband@contesting.com">mailto:topband@contesting.com>
OK....fine! From there attach a Dacron rope to support a Lazy Inverted L or sloper that is started some distance away from the tower to minimize interaction, and feed it with 50 ohm coax against a few radial. You can even drop a wire for 80 meters from the same halyard and use the same feed connection. Both the 160 and 80 wires should be slightly longer than 1/4 wave so two different series capacitors can be used as may be required. If the 160 and 80 drop wires are 20 feet or more apart you should be able to use the same feed line without any serious problem. The radial you use for 160 work just a good for 80 and of they are insulated wire laying on the ground need not be a quarter wave and can be 20 to 30% shorter than normal.


Herb Schoenbohm, KV4FZ

On 12/9/2015 9:12 PM, Cqtestk4xs@aol.com wrote:
*Yes, at 80 ft.*
In a message dated 12/9/2015 10:43:27 P.M. Coordinated Universal Tim, herbs@vitelcom.net writes:

    Is there anyway you can put a slip ring to support a T antenna
    (Marconi)
    for 160 and 80 at some height that won't snag the beam elements?


    Herb, KV4FZ

    On 12/9/2015 6:34 PM, Cqtestk4xs--- via Topband wrote:
    > Next year I'll be building a new home and station in Hawaii.
    >
> 40 through 6 meters is already set in stone, but 80 and 160 are still
    > cloudy.
    >
    > Here's the setup:
    >
> I'm allowed one tower maximum 90 ft. The tower will be 90 ft of Rohn 55 > using a K0XG rotating system with two rings. It will be guyed using > fiberglass guys. There will be a bunch of HF VHF stuff on the tower. Three
    > tribanders, two 12/17 meter Yagis, a 40 meter Yagi and way  down
    on the bottom
    > two 6 meter antennas.
    >
> The tower sits on VERY uneven ground. Although the lot measures 12
    > acres, I am using only the top three and renting out the rest of
    the  land to a
    > farmer to keep taxes from being crazy high.
    >
    > The ground is pure alluvial red fine particle soil (no stones)
    and  has a
    > depth of about 6 feet before hitting rock. Since the east side
    of  Hawaii
> gets at least 100 inches of rain a year it is usually pretty moist. I would > assume the soil is at least average or better in conductivity. I can run
    > ropes, wires etc off the tower at the 80 and 40  foot guy
    points, but can not
    > connect directly to the tower since the tower rotates.  The is
    no room for
    > a rotating dipole on the tower for  80.
    >
    > I've used quad triangle loops before with the pointed end on
    the  bottom
    > suspended by wires and am leaning towards that since the ground
    is so  uneven
    > and the terrain difference would be a real negative for a 4
    square (I
    > think).
    >
> On 160 I'm leaning toward a wire vertical suspended from a rope coming
    > from the tower which would make the antenna about 65 or 70 feet
    tall and  to
    > compensate for that I would make it a T-top.
    >
> For rx I have lots of room to run a 700 -900 Beverage to JA and another to
    > EU/USA direction, so that isn't a problem.
    >
    > I do need suggestions for my 80 and 160 tx situation.  Any  ideas?
    > _________________
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