Depends upon the concrete/cement .
( Base fed vertical)
Years ago, found after experimenting with out base insulators that
there were definite high RF losses. (resistance went through to earth)
73
Bruce-k1fz
https://www.qsl.net/k1fz/bognotes.html
.
On Sun, 16 Sep 2018 20:26:02 -0400,
Hi everybody!
A couple thoughts on shunt fed towers...
Depending on what you read on the web, concrete/cement might (or might
not) be somewhat of a conductor. So, could attaching to concrete around
the house be a help as a ground/radial?
Thoughts???
Feeding a tower with NO RADIALS.
It seems
ntenna limitations".
73 Kevin K3OX
- Original Message -
From: "Peter Voelpel"
To: topband@contesting.com
Sent: Sunday, September 16, 2018 9:44:46 AM
Subject: Re: Topband: Use shunt fed tower
It can work and it does.
I used a shunt fed tower without radials for a
ge -
From: "Peter Voelpel"
To: topband@contesting.com
Sent: Sunday, September 16, 2018 9:44:46 AM
Subject: Re: Topband: Use shunt fed tower
It can work and it does.
I used a shunt fed tower without radials for a couple of years on the former
qth just with the tower g
Peter, DJ7WW
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of John
Harden, D.M.D.
Sent: Sonntag, 16. September 2018 02:43
To: daraym...@iowatelecom.net
Cc: topband@contesting.com; cfytech24x7
Subject: Re: Topband: Use shunt fed tower
A shunt fed tower
. 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 shunt fed tower is a vertical antenna so it offers low
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
>> -Original Message- From: cfytech24x7
>> Sent: Saturday, September 15, 2018 11:29 AM
>> To: topband@contesting.com
>> Subject: Topband: Use shunt fed tower
>>
>> A shunt fed tower is a vertical antenna so it offers lowest take off angle.
>> Shunt
. .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 shunt fed tower is a vertical antenna so it offers lowest take off angle.
> Shunt fee
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
wont perform if you do not detune
your tower.
No pain no gain!
73's
JC
N4IS
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Steve
Lawrence via Topband
Sent: Saturday, September 15, 2018 3:22 PM
To: Top Band List List
Subject: Re: Topband: Use shunt
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
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
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