Author Topic: Cheap and Dirty 10 Meter Antenna you can build in an Hour......  (Read 6913 times)

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BTPost

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I was asked to Post this here, by a Prep'ed Ham Member.... It ws originally for CB Radios and Posted on another site.... If you want to make it
for CB, change the 105" to 108" and everything else, stays the same.... Just say'en.....


This is a cheap and dirty 10 Meter Antenna that you can build in an Hour, out of stuff you have laying round.

Parts:
50 ft of 50 Ohm Coax... any size.
20 foot piece of 1" PVC Pipe with one End Cap
Little bit of PVC Glue
One PL-259 coax connector
Roll of electrical tape
Tube of Epoxy glue

Instructions:
Take your coax and measure 105" from one end, and then carefully cut the outer covering and strip it off so that you have 108" of braid showing.
Then carefully pull the braid down at the 105" point and using a knife or pair of scissors, but the braid 1/2" above the 105" point and remove the braid tube from the insulated center wire.
Fold the .5" section of braid left, back down over the outside insulation, and then wrap it with some small cooper wire, and solder the copper wire to hold the braid in place.
Now take the Braid Tube and slide it over the other end of the coax, until it is up to the soldered section you just made, and then solder the end of the Braid tube to that section.
Pull the Braid Tube down the coax, using the free end, until it is stretched tight. it will be approximately 108 In long, and use some Electrical Tape to secure it to the coax.
Push the Center Insulated Wire end of the coax, up inside the PVC Pipe until the end comes out the far end. Take the PVC Cap and fill it 1/2 way full of Epoxy Glue, and then stick the end of the Center Insulated Wire, in it and let it set up solid.
Coat the end of the PVC Pipe, with PVC Glue and push the Cap with the Center Insulated Wire embedded, on to the Pipe end and let that setup.
Take the electrical Tape and use it so seal up the other end of the PVC Pipe where the coax is hanging out.
Install the PL-259 coax connector on the far end of the coax.

Plug the Pl-259 into your 10 Meter Radio Antenna Connector, (SO-239) and mount the 20ft PVC Pipe Vertical, at the bottom, and start talking.

You have just built a Vertical 10 Meter Dipole Antenna, that needs NO Grounding, or other constructs, to work. The RF Ground is made, using the Braid you threaded back over the free coax end, and soldered to the center soldered Section.

Just Say'en..... YMMV.....

Bruce in alaska AL7AQ

PLA

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Re: Cheap and Dirty 10 Meter Antenna you can build in an Hour......
« Reply #1 on: March 25, 2012, 04:53:26 PM »
Aesome, I did the math and came out with 109.36 inches. Why is it 105? Or am I reading into it to far? Im making it tonight, I have a ton of coax , and if it doesnt matter Im going to use regular CTV coax, its a 25W max transmit radio.

Belay that, all I have is 75ohm cable

have to wait...


If you never hear from me again I fell putting it up :o
« Last Edit: March 25, 2012, 06:32:51 PM by PLA »

PLA

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Re: Cheap and Dirty 10 Meter Antenna you can build in an Hour......
« Reply #2 on: March 30, 2012, 05:21:47 PM »
OK, apparently Im jinxed

Schedule 40 is not strong enough to support RG8, gravity sucks and wind makes it worse.

Antenna itself seams ok , just have to find another way to hang it

SigInt

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Re: Cheap and Dirty 10 Meter Antenna you can build in an Hour......
« Reply #3 on: March 30, 2012, 09:58:50 PM »
I was asked to Post this here, by a Prep'ed Ham Member.... It ws originally for CB Radios and Posted on another site.... If you want to make it
for CB, change the 105" to 108" and everything else, stays the same.... Just say'en.....


This is a cheap and dirty 10 Meter Antenna that you can build in an Hour, out of stuff you have laying round.

Parts:
50 ft of 50 Ohm Coax... any size.
20 foot piece of 1" PVC Pipe with one End Cap
Little bit of PVC Glue
One PL-259 coax connector
Roll of electrical tape
Tube of Epoxy glue

Instructions...

...You have just built a Vertical 10 Meter Dipole Antenna, that needs NO Grounding, or other constructs, to work. The RF Ground is made, using the Braid you threaded back over the free coax end, and soldered to the center soldered Section.

Just Say'en..... YMMV.....

Any Photos?
Books I highly recommend:

One Second After
Under the Dome
Earth Abides
The Road
The Stand

BTPost

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Re: Cheap and Dirty 10 Meter Antenna you can build in an Hour......
« Reply #4 on: March 31, 2012, 01:29:57 AM »
No, No Photos, as these were designed 4 decades ago before digital cameras....

another way to use these is to tape a Para-cord Loop to the top of the Antenna,
and then use a length of Para-cord to pull it vertical from a tree Limb.

I always tune my Fixed Frequency Antennas, with an Impedance Bridge and my Spectrum Analyzer with Tracking Generator.
Easy to see the 50 Ohm Dip Frequency on the scope. I measure it out a bit long, and see where it actually
Resonates. Then calculate how much to trim to bring it right on Frequency, and then trim it, right in. Takes the guess work out
of the antenna design.


Just Say'en..... YMMV.....
Bruce in alaska AL7AQ

PLA

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Re: Cheap and Dirty 10 Meter Antenna you can build in an Hour......
« Reply #5 on: April 01, 2012, 09:07:08 PM »
The paracord loop is my next step

Ill get some pics up tomorow once Ive finished monkeying with it

Not a lot of 10m activity south of me at all