THANKS to the friends who answered me. Please do not trash before reading,
need more help!
In this time tower has been ordered, it should be tall 25 meters more one
meter of balcony. At the four corner of such balcony will be fixed 4 poles
from which the 4 wire square array will start. Any suggestion to follow
before everything will be set. I thought the N4KG project would be the best
for the site described below. On the tower a 3 el. yagi for 40, and with
gamma match all the system tuned for 160m.
Could a gamma match mounted INSIDE the tower? The four legs will be spaced
2 meters...this, I mean, to minimize interactions with 4 square.
Any idea how to mount 4 square? Should I mount one first, after tune it,
dismanting it, measuring and after do all the other 3 the same lenght? I
fear that mutual capacitance would upset everything. I would like setting
everything in the CW subband, so lets say at 3510 Khz.
Thanks again for help and sorry for the bandwidh
At 30/08/97 I wrote:
>Hi Towertalkians,
>I need your help. At the end I have found a local farm which should build
a tower for me. The place in which it should be erected is a not regular
square with one side of 50 meters, the other of 40 meters. The third and
fourth sides are about 30 meters and 15 meters.
>Now this ground place holds my 10 meters tower with a force12 C3XL , a Gap
Voyager and a system of 2 phased verticals. All these sfuffs would be
removed to make place to a single tower on which I wish resolve the 160,
80, and 40 meters band.
>For 40 meter I thought at a 2, or 3 el. yagi.
>On 80 I'd like to have a 4 square array of verticals....after having
tested for 2 years my 2 el. for 40...I'd like to have same results also on 80.
>For 160 meter....sorry, but I do not know waht put up. I need such band
for mainly contesting and DXing, so low elevation angles should be
required. It could be a good system to drive the whole tower with a
gamma-match, so my answer is:
>Is it possible on a single tower putting all these stuff? Taking steady
the idea of a Yagi for 40, could a 4 wire square array function when among
them there should be a tower, which base surely will not less than 1,5 -2
meter side?
>Besides this, is for you possible using a tower with up a yagi, a 4 square
array (wires), also for 160? I have not at all how interactions should be?
>Another matter...also more hard: tomorrow will expires the price that farm
made me, so i must decide into tomorrow the high of such tower. I have
thought at a self supporting, tapered, with sure external stairs, with
balcony up tower.
>For such a farm no problem at all for building it, but...and they are
right, could like to know how tall should this tower be?
>I thought at 30 meter high....is it too tall for resonating it to 160,
considering that a 2, or more probable 3 elements yagi should be up?
>For cost purpose, they could arrange for me a tower of 25 meter high but I
fear it would be too short for hosting a 4 square with elevated radials at
3 meter up, and loading it for 160.
>I know...surely my message could not have much sense, but after months of
thinking, reading messages from this reflector...sadly my doubts do not yet
abandone me....hi
>Thank for your help....hope in few months offering a more steady signal in
future contesting.
>Please do not reply me as "Try and see"...hi. This coming stuff, I can
assure you, has a cost that it would be more sight to shut up....hi
>ciao...Sante
Here what I got.
To: <towertalk@contesting.com>
Date: Sun, 31 Aug 1997 09:30:29 -0500 (CDT)
From: no9z@prairienet.org (Lynn D. Osterbur)
I will tell you what my installation is.
/----/ -> 2 element cushcraft 40 meter beam
|
|
| 11 feet seperation between antennas
|
/-/-/-/----/--/ 6 element tribander KLM
|
X
X
--X
| X
shunt feed gamma match
at 80 feet | X
| X
| X
gamma spacing | X
is 34 inches | X
| X
| X tower height = 100 feet
| X 3 sets of insulated guywires
| X
series tuning capacitor
about 100pf | X
| X
_________________________________________ground radials and ground rods_____
hope this helps 73 Lynn
THis setup works very well
----------------------------------------------------------------------------
---
From: "Albert Crespo" <nh7a@gte.net>
To: "( Sante ) IK0HBN" <ik0hbn@isa.it>
To: <towertalk@contesting.com>
Date: Sun, 31 Aug 1997 17:24:30 +0100
Sante,
I have a 4 square for 80 meters on one 30 meter tower. Anything that is
within the area of the inverted wires will effect the signal pattern of the
four square.
If possible, put up a one tower for the yagis and load it up for 160.
Use a separate 30 meter tower for a 4 square and use inverted radials
On 160, I use a loaded 25 meter tower with a 40 and 10 meter yagis at
the
top. I have worked Europe with it so it does get out.
Good Luck!
Aloha, Al
----------------------------------------------------------------------------
---
To: <towertalk@contesting.com>
Date: Sun, 31 Aug 1997 13:58:40 -0500
From: w5hvv@aeneas.net (Rod Fitz-Randolph)
Sante, 30 meters is an ideal height for DXing. Make it for 30 meters
if you can because you can match it on 160 meters with a shunt fed
arrangement, while the beams on the top will be at the optimum height
for DXing.
Best Regards,
Rod Fitz-Randolph, N5HV
w5hvv@aeneas.net
----------------------------------------------------------------------------
---
To: ik0hbn@isa.it
To: <towertalk@contesting.com>
Date: Sun, 14 Sep 1997 05:44:20 -0600
From: n4kg@juno.com (T. A. Russell)
Hello Sante -
A 30M tall tower with a 2 element 40M beam can easily be shunt fed
on 160M. I expect you can also make an 80M 4 square using sloping
wires to the tower. This sounds like a very good system that can be
implemented easily. DO NOT put any Yagi's in the middle of the tower
if you intend to use the tower as a 160M vertical. Intermediate antennas
will degrade the performance of a top loaded vertical.
To make a 160M 4 square would require a much taller tower (50-60M).
Keep the 10M tower for the C3 if you can. It should be an excellent
performer
during daytime operation.
de Tom N4KG
--
\\||//
THIS MESSAGE WAS SENT BY: (.)(.)
-----------------------------oOOo--(__)--oOOo-----------------------------
Sante Lillo, IK0HBN | Home telephone: +39-761-407543
Localita' Saineta, 3 | Fax on request : as above
01030 Bassano in Teverina (VT) Italy | Cell. telephone: +39-338-6825052
E-Mail: ik0hbn@isa.it | packet: IK0HBN@I0INU.IUMB.ITA.EU
Home Page: <http://www.qsl.net/ik0hbn>| DX cluster : IK0HBN > I0JBL-6
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