[TowerTalk] Cage Vertical ideas wanted.

[W5CPT]

Dick,
Thanks for the "heads-up".  I never have figured out how to model an antenna.  I really didn't think I could cover both the 75 & 80M bands.  I had hoped to broaden the bandwidth enough that I didn't have to re-tune every 40 KHz.  I guess I could use the tie-wrap idea on a larger circle but don't have a clue what I could use to make a 24" diameter spreader, though it is intriguing.

Clint - W5CPT
  ----- Original Message ----- 
  From: Dick Dievendorff 
  To: 'W5CPT' 
  Sent: Sunday, December 07, 2008 4:35 PM
  Subject: RE: [TowerTalk] Cage Vertical ideas wanted.


  Is a 6" cage going to give you enough bandwidth?  I have a bunch of circular
  plastic spreaders for 4" in diameter, and after a little modeling I decided
  that they weren't going to be much help for a 75/80 meter dipole.  I think I
  need spreaders that are on the order of 2 feet long for a four-wire cage
  that went from 3.5 to 4.0.

  73 de Dick, K6KR


  -----Original Message-----
  From: towertalk-bounces at contesting.com
  [mailto:towertalk-bounces at contesting.com] On Behalf Of W5CPT
  Sent: Sunday, December 07, 2008 2:30 PM
  To: Jim Hargrave; Tower
  Subject: Re: [TowerTalk] Cage Vertical ideas wanted.

  Thanks Jim,
  That is exactly the kind of solution for which I was looking!

  Clint - W5CPT

    ----- Original Message ----- 
    From: Jim Hargrave 
    To: Tower 
    Sent: Sunday, December 07, 2008 3:51 PM
    Subject: Re: [TowerTalk] Cage Vertical ideas wanted.


    Clint,

    You can use the thin drain pipe and drill the attaching holes through the
    side of each ring. Then you can attach the antenna wires to the ring by
    using small nylon cable ties. Pass them thru the hole and out one end
    clamping each wire in the same manner. This will keep the spacing
    consistent. if you drill the holes near one end of the ring, the ties will
    be short and hold the wire tight enough to keep the ring from sliding down
    the antenna. You can even wrap the cable around the ties before closing it
    to provide a little more friction to better hold it in place.

       * 73's Jim W5IFP *



       >-----Original Message-----
       >From: towertalk-bounces at contesting.com
       >[mailto:towertalk-bounces at contesting.com]On Behalf Of W5CPT
       >Sent: Sunday, December 07, 2008 7:14 PM
       >To: towertalk at contesting.com
       >Subject: [TowerTalk] Cage Vertical ideas wanted.
       >
       >
       >I have decided to build a Cage Vertical.  I can get about 80 to
       >100 feet straight up by suspending it from a catenary strung
       >between two of my taller trees.
       >
       >
       >
       >Two points:
       >
       >
       >
       >1 The wire I intend to use is Fishing Line. I tried to post the
       >link but it ends up being 3 lines long, so go to cabelas.com
       >and search for  item number wt-12-1511.  I built a dipole out
       >of this stuff and it solders and crimps well and appears to
       >last for a long time.
       >
       >
       >
       >2. I need ideas on what to use for spreaders.  The 45 lb. test
       >line is .037" which is too big to use a thin slice of 6" PVC
       >drain pipe as I cannot drill holes edgewise into the pieces
       >large enough to accept the wire and small enough to not
       >compromise the strength of the slice of PVC.  I am considering
       >5 or 6 wires in a 5 to 6" diameter and need some suggestions on
       >what to use.
       >
       >
       >
       >Suggestions about the spreaders and other comments are always welcome.
       >
       >
       >
       >Clint - W5CPT
       >
       >
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