- 1. [TowerTalk] 75/80 vertical (score: 1)
- Author: "Gregg Seidl" <k9kl@centurytel.net>
- Date: Fri, 20 Mar 2009 22:56:46 -0500
- Well now that most of the snow has melted its time to finish last years antenna projects!! My question is this: I installed 60 feet of Rohn 25 insulated from ground. I used the tapered top section as
- /archives//html/Towertalk/2009-03/msg00607.html (7,301 bytes)
- 2. Re: [TowerTalk] 75/80 vertical (score: 1)
- Author: jim Jarvis <jimjarvis@optonline.net>
- Date: Sat, 21 Mar 2009 06:58:16 -0400
- Gregg, 234/f says that a quarter wave on 3.8 is 61.58 feet. If it were me, I'd start putting in radials, and hook the thing up to the rig, or an antenna analyser, to see what you've got. Worst case,
- /archives//html/Towertalk/2009-03/msg00615.html (8,724 bytes)
- 3. Re: [TowerTalk] 75/80 vertical (score: 1)
- Author: "W5CPT" <w5cpt@bellsouth.net>
- Date: Sat, 21 Mar 2009 07:43:04 -0500
- Gregg, I am sure you will get all kinds of technical advice but I will offer some anecdotal stuff. Not too many years ago a local radio station gave the college ham club a bunch of Rohn 25G that had
- /archives//html/Towertalk/2009-03/msg00618.html (9,170 bytes)
- 4. Re: [TowerTalk] 75/80 vertical (score: 1)
- Author: <donovanf@starpower.net>
- Date: Sat, 21 Mar 2009 09:29:03 -0400 (EDT)
- Jim, The tubing extension will be longer than expected because of the extreme diameter difference between the tower and the tubing. You can use your favorite antenna modeling program to determine the
- /archives//html/Towertalk/2009-03/msg00620.html (10,550 bytes)
- 5. Re: [TowerTalk] 75/80 vertical (score: 1)
- Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
- Date: Sat, 21 Mar 2009 08:47:02 -0500
- Gregg/Jim, What Frank said below is right on target. As another example: The K3LR 80 meter verticals use the basic HyGain HyTower as their building block. The original HyTower was 51 ft in total leng
- /archives//html/Towertalk/2009-03/msg00621.html (12,317 bytes)
- 6. [TowerTalk] 75/80 vertical (score: 1)
- Author: "Gregg Seidl" <k9kl@centurytel.net>
- Date: Sat, 21 Mar 2009 09:12:38 -0500
- Thanks to all who helped. Kind of confirmed what I had thought/read. Needs to be a bit longer because of the taper and thickness of the tower. Didn't get too many thoughts on the copper wire,but I th
- /archives//html/Towertalk/2009-03/msg00624.html (7,660 bytes)
- 7. Re: [TowerTalk] 75/80 vertical (score: 1)
- Author: <donovanf@starpower.net>
- Date: Sat, 21 Mar 2009 12:41:23 -0400 (EDT)
- Gregg, I recommend not using bare copper wire alongside your tower. Copper will cause galvanizing to fail not only at the connection points, but also anywhere copper ions wash off the bare copper and
- /archives//html/Towertalk/2009-03/msg00626.html (8,652 bytes)
- 8. Re: [TowerTalk] 75/80 vertical (score: 1)
- Author: Richards <jruing@ameritech.net>
- Date: Sat, 21 Mar 2009 13:53:49 -0400
- Wow -- what absolutely wonderful photos of the installation process. The really show how it was done. == Richards - K8JHR == == _______________________________________________ _______________________
- /archives//html/Towertalk/2009-03/msg00627.html (7,705 bytes)
- 9. Re: [TowerTalk] 75/80 vertical (score: 1)
- Author: Richards <jruing@ameritech.net>
- Date: Sat, 21 Mar 2009 14:55:41 -0400
- okay tower talk fans -- I am new at this, but considering a similar project. 1. Rather than run a a second, separate wire all the way parallel to the tower, which would, I believe, if I learned my el
- /archives//html/Towertalk/2009-03/msg00628.html (9,014 bytes)
- 10. Re: [TowerTalk] 75/80 vertical (score: 1)
- Author: jimlux <jimlux@earthlink.net>
- Date: Sat, 21 Mar 2009 15:06:36 -0700
- The current will divide according to the resistances, or more properly, the inverse of the resistance. If the tower is 1 ohm, and the copper wire 1/10th ohm, then 10 times as much current will flow i
- /archives//html/Towertalk/2009-03/msg00630.html (10,786 bytes)
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