DESIGN YOUR OWN J
FOR ANY BAND!
(Try it with aluminum
Either way....TRY IT!
Design your J Pole for hf,
2 meters, 220, 440 and
J-Pole Antenna Design
SAVE TIME BY USING THE CALCULATOR
On most of the J Pole designs out there, a choke
should be used as close to the feedpoint of the antenna as possible to
help prevent rf on the feedline and creating difficulty with SWR readings.
For 2 meters, the coil is 4 turns of coax at 5 inches in diameter. You
should get good results with the choke within 3 or 4 inches of the
feedpoint on 2 meters.
Use the last part of your
feedline as the choke before attaching to the
"Iv'e built my j-poles out of 10ft sticks
of 1/2" emt conduit. Drill a 1/4" hole at the place where the "J"
goes. Make the "j"out of 1/4"
soft copper, Solder it in place thru the hole and add
the cable. Cost about $6 using new parts.
If you need a "super" j, use
a piece of 3/4" pvc as the insulator and add the stub and another 38 or so
inches of conduit. still really cheap"........
want to build but rather buy? Get a 2m/440 dual band J Pole from Amateur
Radio Supply...click the picture below for more
Click picture for more info!
Made in the U.S.A. from
solid aluminum! Very heavy duty and built to
Convert a J Pole to a Slim
Do not install ANY antenna over, under or near
J Pole Calculator and drawing used on
this page are
K4ABT G. E.
"Buck" Rogers Sr
articles in back copies of CQ Magazine
(The Packet Users
All rights reserved
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