Simple 4-Bander Five-Wire Shortwave Listener (SWL) Antenna - Rigged It : Horizontal -or- Sloper -or- Vertical
RHF
Rigged It : Horizontal -or- Sloper -or- Vertical
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/14060
.
Richards,
.
1 - I currently have a 4-Bander Horizontal Wire Antenna
using a TV type 300 Ohm to 75 Ohm Matching Transformer
and 75 Ohm RG6 Coax Cable feed-in-line.
.
2 - It can also be Rigged as a Sloper with a Couterpose
* Just 25 Foot Long
* Rig the Apex at 20 Feet with the Far-End at 8 Feet
* Use a 20 Foot Counterpose
* 22 Feet of Ground Space {Foot-Print} at 60 Degree Angle
* 18 Feet of Ground Space {Foot-Print} at 45 Degree Angle
.
3- For very "Limited' Space rig it as a Vertical
* Bottom Feed-Point at/near Ground Level
* Use a Ground Rod at the Base -if- possible
* Apex High-End-Point 25-26 Feet
.
Mutli-Element Shortwave Listening (SWL) Antenna :
.
Four Element "Flat" 5-Wire TV Rotor Cable 25 Foot Long
Rigged as a Horizontal Wire Antenna - a la John Doty
.
Laid-Out : South-West to North-East (Far End)
22 Foot Up about Two-Feet above the Back Roof
TV 'type' 300 Ohm to 75 Ohm Matching Transformer
RG6 Coax Cable Feed-in-Line about 25 Feet Long
.
<- Feed-Point . . . . . . . . . . . Far-End ->
.
o----------------------------------------------| 50 Feet Two
X----------------------------------------------| Wires Folded
.
X----------------------------------------------o 25 Feet Wire
.
X----------------------------------------------| 37.5 Feet 1 1/2
X----------------------o o---------------------| Wires Folded
<12.5 Ft 1/2 Wire>
.
= 50 Feet ~ 1/4 WL for 60M Shortwave Band ~ 5.0 MHz
= 37.5 Feet ~ 1/4 WL for 49M Shortwave Band ~ 6.1 MHz
= 25 Feet ~ 1/4 WL for 31M Shortwave Band ~ 9.6 MHz
= 12.5 Feet ~ 1/4 WL for 16M Shortwave Band ~ 17.8 MHz
.
"X" = Antenna Feed-Point Connection
"o" = End 'No' Connection
"|" = Wire-to-Wire Connection
.
.
build your own and give it a try - amaze yourself - iane ~ RHF
{pomkia}
.
Shortwave Listener (SWL) Antennas Group => http://tinyurl.com/ogvcf
GoTo => http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
The SWL Antenna Discussion Group => http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna HELP => http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna NEWS => http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna INFO => http://tinyurl.com/ogvcf
* * * All Are Welcome : Including ELMERS and 'Want-to-be-Elmers'
plus plain old "Mister-Know-It-Alls"; and even those Newbees with
"I Know This Is A Really Dumb Question - But _ _ _ _ _ _ _ _ "
.
The Shortwave Listener's Blessing :
SWL BLESSING => http://tinyurl.com/s2bjm
May You Never Tire of Listening to the Radio and Always
have Strong Signals and Noise Free Reception ~ RHF {ibid}
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/9233
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Tous Sont Bienvenus ! - - - Groupe par Radio
d'auditeur d'onde courte pour des Antennes de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Alle Sind Willkommen ! - - - Shortwave Radiozuhörer
Gruppe für SWL Antennen
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Tutti Sono Benvenuti ! - - - Gruppo Radiofonico
dell'ascoltatore di onda corta per le Antenne di SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Todos São Bem-vindos ! - - - Grupo de Rádio
do ouvinte do Shortwave para Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
¡Todos Son Agradables! - - - Grupo de Radio del oyente
de la onda corta para las Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
= = = = Plain Old American-English Translation = = = =
All are Welcome - - - To Join the Shortwave Listeners
(SWL) Antenna Group on YAHOO !
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
|
|
|
/ \
.......!.......
RHF
.
Some one on another Group pointed out that the old 5-Wire "Flat"
TV Rotor Cable is getting hard to find.
.
They noted that their RadioShack still had some of the more
common 3-Wire "Flat" TV Rotor Cable available.
.
RadioShack - 100-Ft. Rotator Control Cable (3-Wire)
http://www.radioshack.com/product/index.jsp?productId=2049616
RadioShack Catalog # 15-1150
.
Plus they wanted a simple Multi-Band Horizontal Wire Antenna
to 'span' the 55 Foot distance across their backyard.
.
Simpler 3-Bander Horizontal Wire Antenna for
Shortwave Listening (SWL)
.
<- Feed-Point . . . . . . . . . . . . . Far-End ->
.
A> X------------------------------------------------o 48 Feet ~ 60m
.
B> X-----------------------------------o_o--------o 39 Feet ~ 49m
.
C> X-----------------------------o_o--------------o 33 Feet ~ 41m
.
A = 48 Feet ~ 1/4 WL for 60 Metre Shortwave Band ~ 4.7 MHz
B = 39 Feet ~ 1/4 WL for 49 Metre Shortwave Band ~ 5.9 MHz
C = 33 Feet ~ 1/4 WL for 41 Metre Shortwave Band ~ 7.1 MHz
.
"X" = Antenna Feed-Point Connection
"o" = End 'No' Connection
.
Note # 1 - Do Not Separate The Wires - Maintaining the Integrity
of the Wire Bundle throughout it's length : Except at the
Feed-Point where the Wires may be separated for about 2-Inches
and Stripped and Soldered for about an Inch for Connection to
the Matching Transformer.
.
Note # 2 - Cut the One Inch Gap {Space between the Wire Ends}
very carefully using an Exacto Knife and remove the piece of
Wire while maintaining the integrity of the Wire Bundle.
.
Note # 3 - All of Wire "A' is used; the Far-End 9-Feet Remnant
of "B" is not used; and the Far-End 15-Feet Remnant of "C" is
not used. However they are maintained in the Wire Bundle to
give it uniform strength throughout it's length.
.
Note # 4 - Mounting Height 1/2 A (24 Ft) to 1/2 C (16 Ft)
.
Note # 5 - Use a Longwire {Random Wire} Matching Transformer
and Coax Cable feed-in-line with a good earthen Ground (Rod).
.
MAKE IT LONGER BY TWO SHORTWAVE BANDS :
A = 71 Feet ~ 1/4 WL for 90 Metre Shortwave Band ~ 3.2 Mhz
B = 60 Feet ~ 1/4 WL for 75 Metre Shortwave Band ~ 3.9 Mhz
C = 48 Feet ~ 1/4 WL for 60 Metre Shortwave Band ~ 4.7 MHz
.
MAKE IT SHORTER BY TWO SHORTWAVE BANDS :
A = 33 Feet ~ 1/4 WL for 41 Metre Shortwave Band ~ 7.1 Mhz
B = 24 Feet ~ 1/4 WL for 31 Metre Shortwave Band ~ 9.4 Mhz
C = 20 Feet ~ 1/4 WL for 25 Metre Shortwave Band ~ 11.6 MHz
RHF
> For One and All,
> .
> Some one on another Group pointed out that the old 5-Wire "Flat"
> TV Rotor Cable is getting hard to find.
> .
> They noted that their RadioShack still had some of the more
> common 3-Wire "Flat" TV Rotor Cable available.
> .
> RadioShack Catalog # 15-1150
> .
> Plus they wanted a simple Multi-Band Horizontal Wire Antenna
> to 'span' the 55 Foot distance across their backyard.
> .
- Simpler 3-Bander Horizontal Wire Antenna for Shortwave Listening
(SWL)
REF Message # 14069
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/14069
> d'auditeur d'onde courte pour des Antennes de SWLhttp://groups.yahoo.com/group/Shortwave-SWL-Antenna/
> .
> Alle Sind Willkommen ! - - - Shortwave Radiozuhörer
> Gruppe für SWL Antennenhttp://groups.yahoo.com/group/Shortwave-SWL-Antenna/
> .
> Tutti Sono Benvenuti ! - - - Gruppo Radiofonico
> dell'ascoltatore di onda corta per le Antenne di SWLhttp://groups.yahoo.com/group/Shortwave-SWL-Antenna/
> .
> Todos São Bem-vindos ! - - - Grupo de Rádio
> do ouvinte do Shortwave para Antenas de SWLhttp://groups.yahoo.com/group/Shortwave-SWL-Antenna/
> .
> ¡Todos Son Agradables! - - - Grupo de Radio del oyente
> de la onda corta para las Antenas de SWLhttp://groups.yahoo.com/group/Shortwave-SWL-Antenna/
RHF
- - - "F C" <march181959@...> wrote:
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/14085
-
- That looks simple enough and a good workable solution.
-
- I was confused about the A,B,C feed points.
-
- Are these all spliced together to the feed in line.
- or are they separated by a switch so that they are
- used separately on each respective band?
-
- Thanks
-
- FC
-
FC,
Simpler 3-Bander Horizontal Wire Antenna for Shortwave Listening
(SWL) - Message # 14039
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/14069
.
"A" and "B" and "C" are simply Designators for the 'individual'
Antenna Wires in the Three Wire Rotor Cable
.
At the Feed-Point "X" are three Wires are Connected together.
.
<- Feed-Point . . . . . . . . . . . . . Far-End ->
.
A> X----------------------------------------------o 48 Feet ~ 60m
.
B> X-----------------------------------o_o--------o 39 Feet ~ 49m
.
C> X-----------------------------o_o--------------o 33 Feet ~ 41m
.
A = 48 Feet ~ 1/4 WL for 60 Metre Shortwave Band ~ 4.7 MHz
B = 39 Feet ~ 1/4 WL for 49 Metre Shortwave Band ~ 5.9 MHz
C = 33 Feet ~ 1/4 WL for 41 Metre Shortwave Band ~ 7.1 MHz
.
"X" = Antenna Feed-Point Connection-Point for All Three Wires
"-" = Wire Antenna Element
"o" = End 'No' Connection
"_" = One Inch Gap {Space between the Wire Ends}
.
.
* * * REVISION * * *
.
Re-Order the Three Wires with the {Un-Cut} "A" in the Center
and the "Cut" "B" and "C" Wires on the Out-Side.
.
B> X-----------------------------------o_o--------'b' 39 Feet ~ 49m
.
A> X----------------------------------------------'a' 48 Feet ~ 60m
.
C> X-----------------------------o_o--------------'c' 33 Feet ~ 41m
.
WHY - This 'places' the Two Wires that have to be "Cut" with
a One-Inch piece {Gap} remove on the Out-Side to make the build
process a little easier.
.
* * * ALTERATION * * *
.
The 'b' Far-End 9-Feet Remnant of "B" can be joined to the
'c' Far-End 15-Feet Remnant of "C" to form a bent 24 Foot
passively-coupled Antenna Element for the 31m Band. Can't
hurt and may help.
.
* * * THE FEED=POINT CONNECTION * * *
.
This is a Multi-Element Antenna that is "Cut' for Three
Shortwave Bands. The Feed-in-Line can be a Coax Cable
with the Inner Conductor 'connected' to the Wire Antenna
Elements -and- having the Outer-Shield of the Coax Cable
Grounded at/in the Radio Shack.
.
NOTE - The use of a 9:1 Matching Transformer between the
Antenna Elements and the Coax Cable feed-in-line is "Optional"
-but- May provide better performance. In this instance
the Matching Transformer* would be Wired :
.
Nine-Side : Antenna Element Wires and the Outer-Shield of
the Coax Cable.
.
One-Side : Inner Conductor of the Coax Cable and the Outer
Shield of the Coax Cable.
.
* This configuation of the Matching Transformer is a
'so-called' Magnetic Longwire Balun (MLB)
.
.
hope this helps - iane ~ RHF
.
Question About - The 3-Bander Rotor Cable SWL Antenna
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/14086
.
.
. .
= = = On Aug 1, 4:15 am, RHF <rhf-newsgro...@pacbell.net> wrote:
> On Aug 1, 4:11 am, RHF <rhf-newsgro...@pacbell.net> wrote:
>
> > For One and All,
> > .
> > Some one on another Group pointed out that the old 5-Wire "Flat"
> > TV Rotor Cable is getting hard to find.
> > .
> > They noted that their RadioShack still had some of the more
> > common 3-Wire "Flat" TV Rotor Cable available.
> > .
> > RadioShack - 100-Ft. Rotator Control Cable (3-Wire)http://www.radioshack.com/product/index.jsp?productId=2049616
> > RadioShack Catalog # 15-1150
> > .
> > Plus they wanted a simple Multi-Band Horizontal Wire Antenna
> > to 'span' the 55 Foot distance across their backyard.
> > .
>
> - Simpler 3-Bander Horizontal Wire Antenna for Shortwave Listening
> (SWL)
>
> REF Message # 14069http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/14069
> > .......!.......- Hide quoted text -
>
> - Show quoted text -
RHF
This Week's 'new' Shortwave Listening (SWL) Antenna :
Linear Twin (2) Element Horizontal Wire Antenna - End-Fed Windom
Antenna
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/14164
63 Feet Long - - - a la John Doty
Laid-Out : South-East to North-West (Far End) from
the Back of he Roof of the House to the Backyard
TV 'type' 300 Ohm to 75 Ohm Matching Transformer
-Note- These are the Larger 3/4" Round Barrel ones that
are usually provided with TV and FM Antennas and can be
bougth in Stores. They seem to work better as a Low Cost
Shortwave Antenna Matching Transformer; than the smaller
1/2" Round Barreled ones that are much cheaper.
RG6 Quad Coax Cable Feed-in-Line about 25 Feet Long
? WHY ? Two End-to-End "Linner" Horizontal Wires ?
MT:==================-------------------------------o
24 Feet Twin Lead and 39 Feet Litz Wire
.
* The 24 Feet of 300 Ohm Twin Lead is connected across
the 300 Ohm Side of the Matching Transformer.
* The 39 Feet of Litz Wire [ 50-Strands of # 41 AWG ] is
connected to one side of the Twin Lead. - Note the other
side of the Twin Lead is not connected at the Far-End it
Floats in Parallel.
* The Total Length is 63 Feet for the Longer
* Note the Shorter Wire is 24 Feet and it's Far-End is not
'connected; and this "other' Side of the Twin Lead Floats
in Parallel to the Longer Side.
.
Sort of : Acts like One Wire -and- Acts like Three Wires :
* 63 Feet ~ 1/4 WL for 75m Shortwave Band
~ 3.9 ~ 7.8 ~ 11.7 ~ 15.6 ~ 19.5 ~ 23.4 ~ 27.3
* 39 Feet ~ 1/4 WL for 49m Shortwave Band
~ 5.9 ~ 11.8 ~ 17.7 ~ 23.6 ~ 29.5
* 24 Feet ~ 1/4 WL for 31m Shortwave Band
~ 9,4 ~ 18.8 ~ 28.2
Currently Rigged "Flat" at about 17~18 Feet above ground level.
Might call it an End-Fed Windom Antenna . . . . .
.
.
Remember 55.5% of Shortwave Radio Listening (SWL)
is the Shortwave Antenna => http://tinyurl.com/ogvcf
.
.
it's time to get linear linear with an end-fed windom - iane ~ RHF
RHF
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/14294
.
Starting with a 100 Foot piece of Flat 5-Wire
TV Rotor {Rotator} Cable.
.
Measure and Cut-to-Size Five (5) 1/4 WL Antenna
Elements one from each of the 5-Wires in the Cable.
.
Use the Silver (Tinned) Wire as your # 1 Wire and
the Longest Antenna element at 98 Feet ~ 1/4 WL
for the 120m Shortwave Band
.
x------------------------------------------------------------------o
98 Feet ~ 120m SW Band
.
Then the # 2 Wire next to # 1 is :
x------------------------------------------------o
71 Feet ~ 90m SW Band
.
The Middle # 3 Wire is :
x---------------------------------------o
59 Feet ~ 75m SW Band
.
Next the # 4 Wire is
x--------------------------------o
48 Feet ~ 60m SW Band
.
Finally the # 5 Wire is
x--------------------------o
39 Feet ~ 49m SW Band
.
Terminate the Far-Ends of these Wires by carefully
Cutting a One Inch (1") piece from the Single Wire.
{Creating a Break 'Gap' in the Individual Wire Run}
.
At the Feed-Point-End "x" connect all the Cut-to-Size
Antenna Elements. {Direct Connection Elements}
.
Now you will notice that there is more Wire in the
Individual Single Wires beyond the Cut-to-Size
Antenna Elements that have been connected together.
These extra Wire Lengths can also be Cut-to-Size
and because they are still in the Flat Cable Wire
Bundle 'passively' coupled to the Direct Connected
Antenna Elements.
.
[ 'o' Un-Connect Cut-toSize Wire Ends Passive Elements ]
.
Wire # 1 has 2 Feet left over at the Far-End
.
Wire # 2 has 27 Feet remaining and can be made
into Two 'passive' Antenna Elements :
o-----------o 17 Feet ~ 22m SW Band
-and-
o------o 10 Feet ~ 13m & 11m SW Bands
by Cutting a One Inch (1") piece from the Wire
at the measured points.
.
Wire # 3 has 39 Feet remaining and can be made
into Two 'passive' Antenna Elements :
o--------------o 19 Feet ~ 25m SW Band
-and-
o----------o 15 Feet ~ 19m SW Band
by Cutting a One Inch (1") piece from the Wire
at the measured points; with 7 Feet left over at
the Far-End
.
Wire # 4 has 50 Feet remaining and can be made
into Two 'passive' Antenna Elements :
o-----------------o 24 Feet ~ 31m SW Band
-and-
o--------------o 20 Feet ~ 25m SW Band
by Cutting a One Inch (1") piece from the Wire
at the measured points; with 8 Feet left over at
the Far-End
.
Wire # 4 has 59 Feet remaining and can be made
into Two 'passive' Antenna Elements :
o----------------------o 32 Feet ~ 41m SW Band
-and-
o------------------o 25 Feet ~ 31m SW Band
by Cutting a One Inch (1") piece from the Wire
at the measured points; with 4 Feet left over at
the Far-End.
.
As I Said {wrote} to start with : "A Not So Simple"
.
Connect the Five {Connected} Wire Feed-Point-Ends
to a Matching Transformer and use a Coax Cable
feed-in-line to your Radio.
.
READ - The Low Noise Shortwave Listening (SWL)
Antenna Set-Up - - -a la- John Doty
http://groups.google.com/group/rec.radio.shortwave/msg/e24cd5e4a449fb60
.
I make no claim this one Shortwave Antenna will give you
"FOOL" Coverage of the Shortwave Bands from 120m to 11m.
[ 'x' Connected Cut-to-Size Antenna Active Elements ]
x------------------------------------------------------------------o
98 Feet ~ 120m SW Band
x------------------------------------------------o
71 Feet ~ 90m SW
Band
x---------------------------------------o 59 Feet ~ 75m SW Band
x--------------------------------o 48 Feet ~ 60m SW Band
x--------------------------o 39 Feet ~ 49m SW Band
.
[ 'o' Un-Connect Cut-toSize Wire Ends Passive Elements ]
o----------------------o 32 Feet ~ 41m SW Band
o-----------------o 25 Feet ~ 31m SW Band
o--------------o 20 Feet ~ 25m SW Band
o-----------o 17 Feet ~ 22m SW Band
o----------o 15 Feet ~ 19m SW Band
o------o 10 Feet ~ 13m & 11m SW Bands
.
* Some will assert that it is more Sizzle then Steak.
* * Practically speaking it just some Wire that happens
to be and Antenna and nothing more .
.
.
this multi-bander is not a no-brainer; so draw it out
and write things down before you attempt to build it
please cut the flat rotor cable carefully cause you
only get one chance to do it right - iane ~ RHF {pomkia}