IW8PGT

W6KWF  > TECH     09.09.90 21:00l 46 Lines 1657 Bytes #999 (0) @ WW
BID : 86292_W1XSC
Subj: J Pole Antenna from 300 ohm ladder
Path: IW8PGT<LU4ECL<VK2RZ<N6PNK<VE3CGR<PI8ZTM<CX2SA<N6RME<W1XSC
Sent: 260909/1615z @:W1XSC.#NCA.CA.USA.NOAM [Santa Clara Co] #:86294 $:86292_W1

         === 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
        !       !     !
        !       !     !
        !       !     !
        !       !     !
        !       !     !
        !       !     !
        !       !     !
        !       !     !
        !       !     !
        !       !     !
        !       !     !
        !       !     !
      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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