Steve,
Think you are doing a great job considering the lot size.Never know what
else is in the mix. The power line neutral (ground) may. be helping
Someone years ago fastened to a metal sewer line.
73
Bruce-k1fz
https://www.qsl.net/k1fz/beverage_antenna.html
On Sat, 15 Sep 2018 19:36:13
Any antenna can work. . . it's a question of degree.
-Original Message-
From: Steve Lawrence
Sent: Saturday, September 15, 2018 9:36 PM
To: John Harden, D.M.D.
Cc: daraym...@iowatelecom.net ; topband@contesting.com ; cfytech24x7
Subject: Re: Topband: Use shunt fed tower
217 DXCC 36
217 DXCC 36 Zones. Shunt fed tower. No radials. West Coast city lot. I can
only imagine my totals if it really worked.
73 Steve WB6RSE
> On Sep 15, 2018, at 5:42 PM, John Harden, D.M.D. wrote:
>
> A shunt fed tower requires radials period. It cannot work without them!
>
> 73,
>
> John,
A shunt fed tower requires radials period. It cannot work without them!
73,
John, W4NU
Sent from my iPhone
> On Sep 15, 2018, at 1:55 PM,
> wrote:
>
> It makes no difference how the tower is fed, a vertical antenna must have
> radials of some kind to be effective. 73. . .Dave, W0FLS
Hi Mike - Yes no doubt that radials, any radials, would at the least not hurt.
My house is literally surrounded by concrete and brick. IE no digging to plant
radials. I did try a couple of full length radials attached at the tower and
snaked around the perimeter of the house for part of a
Hi Steve,
It sounds like you have done *much* better on 160 than I --and a lot of
other Topbanders-- have, *and from such a small lot*! It sounds like you
have exceptionally good ground conductivity.
In any case, I believe that you would have done even better (is that
possible? ;-) if you had
Hi Guys, here my two cents.
Radials are important to increase the power gain. The directivity gain is
the same. More efficiency means more irradiated power, just it. Steve TX
antenna may have 50 % efficiency. It means using a 1 Kw only 500w is
irradiated. The ground type is responsible for low
My shunt fed tower has no radials. Two 8 ft copper ground rods were driven into
the soil when the tower base was installed. Heavy gauge wire was used to attach
the rods to the tower base bolts. There is simply no place for any radials on
my postage stamp size West Coast city lot.
I believe my
Chuck,
I would disagree with you that tower shunt feeding avoids needing radials.
Any vertical antenna without some kind of counterpoise will be disadvantaged
unless it is close to 1/2 wavelength long. Even then some sort of radials are
best. A shunt fed tower does indeed need a good
It makes no difference how the tower is fed, a vertical antenna must have
radials of some kind to be effective. 73. . .Dave, W0FLS
-Original Message-
From: cfytech24x7
Sent: Saturday, September 15, 2018 11:29 AM
To: topband@contesting.com
Subject: Topband: Use shunt fed tower
A
Hello Chuck,
On Sat, Sep 15, 2018, 11:30 AM cfytech24x7 wrote:
> A shunt fed tower is a vertical antenna so it offers lowest take off
> angle.
True. 160m is a band for vertical polarization if we want to work DX. See
www.w0btu.com/160_meters.html .
Shunt feeding avoids need for radial
A shunt fed tower is a vertical antenna so it offers lowest take off angle.
Shunt feeding avoids need for radial field. Any horizontal wire antenna is
going to put most of your radiated energy out at high angles, unless you can
get it at least a half wavelength of height. A loop may be a
On 9/14/2018 10:28 AM, Simon Ravnič via Topband wrote:
At S53M contest station we are well organized for 40m & up but are lacking
lower band TX antennas.
I suggest 2 element vertical arrays phased for a cardioid
pattern such that the nearest tower is directly off the
back. This takes
Mike, you suggested a delta loop. It is important that if Simon decides to
hang a delta loop between towers that you feed it a the corner rather than
at the bottom. This should give you some vertical component at a much
lower take-off angle rather than being a clod warmer on 80 meters.
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