Message 29691 in TECH.WW
From: W6KWF
Date: Wed, 09 Sep 26 16:15:00 Z
Newsgroups: TECH.WW
Subject: J Pole Antenna from 300 ohm ladder
Message-ID: <86292_W1XSC>
Path: N2MH4|DK0WUE|PI8ZTM|CX2SA|N6RME|W1XSC
R:260909/1624Z 36892@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260909/1623Z 34733@DK0WUE.#BAY.DEU.EU LinBPQ6.0.25
R:260909/1622Z @:PI8ZTM.#ZH1.NLD.EURO #:59167 [Den Haag] $:86292_W1XSC
R:260909/1622Z @:CX2SA.SAL.URY.SOAM #:4094 [Salto] FBB7.00e $:86292_W1XSC
R:260909/1619Z @:N6RME.#NCA.CA.USA.NOAM #:45424 [El Dorado] $:86292_W1XSC
R:260909/1615z @:W1XSC.#NCA.CA.USA.NOAM [Santa Clara Co] #:86294 $:86292_W1XSC
=== 2 Meter J - Pole made from 300 ohm twin lead ===
(Taken from Jan. 1984 D.A.R.C. antenna article by James Burks, KA5QYV)l
_______ _____ <== DON'T SHORT THIS END
! ! !
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54 in. ! !
! ! _! __________
! ! !_ __________}1/4 inch gap
! ! ! !
! ! ! !
! ! ! !
! ! ! !
! ! ! !
attach shield==>! !<==attach coax center conductor____
! ! ! 16 3/4 inches !
! !_____! ! 1 1/4 in.[adj. this length
___!___ !___! __________!____________________!_ for min. SWR]
^
<Solder the twin leads together here>
1. Start with 54 1/2" of good quality TV lead.
2. Strip 1/2" of insulation and solder wires together.
3. Measure 1 1/4" from bottom and strip insulation.
This is solder point for coax feedline. (center on short side)
4. Measure 16 3/4" from bottom and cut out 1/4" notch.
This tunes antenna to middle of 2 meter band.
5. Feed with a length of RG58U coax. Tape coax at
feedpoint to the twin lead.
6. Antenna may be sleeved inside 1/2" PVC for outside
mounting or thumbtacked to an inside wall.
Kenneth, W6KWF @ W1XSC.#NCA.CA.USA.NOAM
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