What diameter of PVC pipe are you using, and does the slink go inside
or outside the pipe?
RHF wrote:
So Like I Had This Idea and Wow !
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What About a Multi-Band "Off-Center" Vertical Dipole Antenna
made from a Single (one) Slinky for Shortwave Listening ?
http://groups.yahoo.com/group/Shortw...a/message/5696
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Building the Multi-Band "Off-Center" Vertical Dipole Antenna :
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Get an Eight Foot Piece of PVC Pipe as your Vertical Antenna
Form and a Stabdard Size Slinky.
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NOTE - The standard Full Size Slinky has about 100 Turns
with a Diameter of 2 3/4 Inches and a Circumference
of 8.64 Inches for a Total Wire Length of 72 Feet.
* Optimum "Stretched-Out" Length about 22.9 Feet
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Drill Four (4) Holes through both sides of the PVC Pipe.
Hole # 1 - One an Inch from the Bottom
Hole # 2 - One 36 Inches from the Bottom
Hole # 3 - One 37 Inches from the Bottom
Hole # 4 - One an Inch from the Top
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Take a Standard Size SLINKY and starting at one end count-off
36 turns and Cut the Slinky at this point. You now have two
pieces of Slinky one shorter piece with 36 Turns and the other longer
piece with about 64 Turns.
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Take the piece of Slinky with the 36 Turns and place on
the piece of PVC Pipe (pipe going thru the 35 Turns of
the Slinky) and then thread one end thru Hole # 1 and
Bend that End to lock it in place.
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Stetch-Out this 35 Turn piece of Slinky so that the other
end can be threaded thru Hole # 2 and Bend that End to
lock it in place.
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Take the piece of Slinky with the 64 Turns and place on
the piece of PVC Pipe (pipe going thru the 64 Turns of
the Slinky) and then thread one end thru Hole # 4 and
Bend that End to lock it in place.
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Stetch-Out this 64 Turn piece of Slinky so that the other
end can be threaded thru Hole # 3 and Bend that End to
lock it in place.
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Now connect or Solder the Leads of a TV type 300 Ohm to
75 Ohm Matching Transformer to the Bent Ends of the Slinky
coming out of Holes # 2 and # 3.
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Place an End-Cap on both ends of the PVC Pipe.
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Mount the Multi-Band "Off-Center" Vertical Dipole Antenna :
InDoors in a Corner; OutSide Hanging from the Eaves; Mounted
to the Chimney; or setting on top of a piece of Top-Rail.
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Connect a 75 Ohm Coax Cable (RG6 Quad-Shield) to the
Matching Transformer and down to your Radios.
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ALT # 1 - Use a Longer-Wider piece of PVC Pipe :
Ten Foot (120 Inches) piece of PVC Pipe.
Drill Four (4) Holes through both sides of the PVC Pipe.
Hole # 1 - One an Inch from the Bottom
Hole # 2 - One 45 Inches from the Bottom
Hole # 3 - One 46 Inches from the Bottom
Hole # 4 - One an Inch from the Top
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ALT # 2 - Use a Smaller-Shorter Size Slinky :
Slinky Jr. {Junior} which has about 85 Turns with a Diameter
of 1 7/8 Inches and a Circumference of 5.89 Inches for a
Total Wire Length of "41.7" Feet.
* Optimum "Stretched-Out" Length about 13.3 Feet
Therefore - The Bottom piece of Slinky Jr. would be 32 Turns
and the Top piece would be 53 Turns.
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iane ~ RHF
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All are WELCOME and "Invited to Join" the
Shortwave Listener (SWL) Antenna eGroup on YAHOO !
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
SWL ANTENNAS GROUP = http://tinyurl.com/an6tw
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Some Say: On A Clear Day You Can See Forever.
http://groups.yahoo.com/group/Shortw...na/message/502
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I BELIEVE: On A Clear Night . . .
You Can Hear Forever and Beyond, The BEYOND !
With a Shortwave Listener SWL Antenna of your own making.
"If You Build It {SWL Antenna} You Will Hear Them !"
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