Well, plans were sent to the list a couple weeks ago but I can send them
again no problem.
JPole Antenna
      A JPole Antenna
      In emergencies, you are likely to have to put up an antenna somewhere.
The
      JPole described here is cheap, easily made, and works very well. Plus,
      it's portable!
      Home Are you ready to use your amateur radio communications skills in
a
      real emergency?
      This page, taken from various Internet sites, will help, by enabling
you
      to build your own roll-up Jpole antenna.
      The 2-Meter 300 Ohm TV Twin-lead Roll-up J-pole.
      As we all know, the antenna is the most important part of any
transmitter
      system. It must be placed as high as possible, properly matched to the
      transmitter, and designed to effectively radiate the power applied to
it.
      The antenna that we are going to construct will be made from ordinary
      300-Ohm TV Twin lead wire. This wire is available at almost every
      hardware, drug store, and other stores that carry such items as
telephone
      extension cords.
      In the diagram below you will see the construction details of the
antenna.

      Now, on to the step by step.
      Tools: Ruler, Wire strippers, Wire Cutters, Soldering Iron.
        Measure 54" of Twin lead and mark this spot with some masking tape.
Cut
        the wire about 1 ½ inches longer than this measurement. If this is
your
        first attempt at building something, you may want to leave 4 " of
extra
        wire on the piece you are working with. This will allow an
additional
        attempt of the critical portion of construction.

        Remove the center insulation from the bottom 1-inch of twin lead.
Strip
        the insulation off of the bottom section of twin lead (only the 1
").
        Connect the wire together at this point and solder.

        From the splice you just made at the bottom, measure up about 1 "
and
        remove ½ " - ¾ " of insulation from each conductor. This is where we
        will be attaching the coax.

        From the splice measure up one side 16 ½" . CHECK THE MEASUREMENT
TWICE.
        Cut a gap on this side about ¼" wide. Be sure to remove the
conductive
        material from the notch.

        From the splice, re-measure the total length to 54 " and trim the
top.

        Attach some coax to the opened area of the wire about 1 ¼" from the
        splice. The shield of the coax MUST connect to the notched side.

        Attach a suitable connector on the end of the coax for your
transmitter
        and GO!


      Note: The antenna can be hung from almost anything using some string
      through a hole in the insulation about 1" from the top.


© Michael Willems 1999
Comments: [log in to unmask]

----- Original Message -----
From: "Colin McDonald" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, February 15, 2005 4:39 PM
Subject: Re: Twin lead J pole


> John:
> send us a discription of the antenna and how you built it.
> Regards
> Colin