HOW TO BUILD JPOLES
Use caution when making JPOLE antennas.They are made mostly from
copper pipe that must be soldered together and get very hot.Stay away from
power lines;remember power lines can cause death if the antenna comes
into contact with them.
A J POLE antenna can be fun to build
and very rewarding.These are great
antenna with low SWR.
These can be made for most the
bands from 70 centimeters to
6 meters.
As you look at jpole plan notice
where the coax connects.Where
the shield connects solder a SO239
here,i put a pop rivet in there first
to hold it in place.Come from the
center of the so239 with a piece of
number 12 solid copper wire.This
will connect to the long radiator.
Make sure to use 23/f/(mhz) = FT
and connect so239 and center here.
You can connect the center wire to
the short radiator if you desire.
My test show this makes the antenna some
what one sided away from the long radiator.
At this you may have to turn the antenna to hear certain stations.
After construction add coax and test SWR;adjust center wire to abtain
lowest SWR.You can paint this JPOLE gray or green to make it almost
invisible.Gray is my choice and can not be seen against the sky line.
6 METER JPOLE
This is a 6 meter jpole notice
it is made with 3/4 copper pipe.
At 5 1/2 inchs add the so239 to the
short stub with a pop rivet.Use
caution when soldering the so239
use small solder or the so239 may
melt.Add the number 12 solid
copper wire to the long
radiator.Usa a L shape male to
female connector at the so239
and point down ward.This will
take the stress off of the pl259
that will connect here.Make at
least 4 turns in a 5 inch circle
as shown.
BE CAREFULL WITH HOT METALS AND TORCHS!
POWER LINES CAN CAUSE DEATH ! PLEASE
BE CAREFULL WHEN INSTALLING ANTENNAS!
Do you know of a area the W5YI team can hold test sessions?We would like to offer class testing once a month.We would like to find
a church class room,school or a club in which to hold test sessions.Help us reach out to others;become a participant of our VE group.
Share with others the hobby you have learned. Please email KF4ONB( Wayne Darnell ).
knd320@comcast.net
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