Jpole calculator by K4ABT, (C) 1995

DESIGN YOUR OWN JPOLE FOR ANY BAND! 
Design your J Pole for 50 mHz thru 500 mHz

  J-Pole Antenna Design 

SAVE TIME BY USING THE CALCULATOR BELOW.
NOTE: Coax center conductor attaches to the
 "Long section" feed point.
Shield attaches to the short section feed point.


Enter The Operating Frequency
(use your mouse to clear the window then enter your frequency) 

   Freq MHz

A (Long section) dimension is:  feet,    inches,      meters

B (Short section) dimension is:  feet,    inches       meters

C (Feed point) dimension is:       feet,    inches       meters

D (Spacing) dimension is:           feet,   inches,     meters

Inside (spacing) dimensions are metal to metal measurements, NOT center to center.

All J Pole designs should use a BALUN made specifically for VHF and UHF.  We recommend using the BUXCOMM BVUBALUN.  A choke balun of sorts can be formed near the feed-point, however, this type choke Balun is not as efficient as the VUBALUN.

 

DANGER!
Do not install ANY antenna near power lines!  When installing an antenna, never work alone.

J Pole Calculator and drawing used on this page are Copyright by K4ABT Glynn "Buck" Rogers Sr
VISIT:      k4abt@packetradio.com    www.buxcomm.com       www.PacketRadio.com
You can download his books and articles at:    www.JaComm.com/techfiles.html
Copyright 1995  All rights reserved