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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*Topband\:\s+Top\s+Loading\s+of\s+Shunt\-fed\s+Tower\s*$/: 9 ]

Total 9 documents matching your query.

1. Topband: Top Loading of Shunt-fed Tower (score: 1)
Author: "Jerry Keller - K3BZ" <k3bz@arrl.net>
Date: Wed, 9 Feb 2005 15:10:42 -0500
I'm considering shunt feeding of a 45 foot freestanding tower with a 3L SteppIR on top for 160 and 80. The SteppIR is NOT electrically connected; the tower IS grounded,,, each leg has a 32 feet of #4
/archives//html/Topband/2005-02/msg00123.html (7,738 bytes)

2. RE: Topband: Top Loading of Shunt-fed Tower (score: 1)
Author: "Joe Subich, K4IK" <k4ik@subich.com>
Date: Wed, 9 Feb 2005 16:41:36 -0500
Jerry, There is a concern for the matching transformer/balun if you operate the SteppIR with the elements (driven element) extended. depending on the driven element length, tower height, etc. the bal
/archives//html/Topband/2005-02/msg00125.html (8,297 bytes)

3. RE: Topband: Top Loading of Shunt-fed Tower (score: 1)
Author: "Howard Klein" <howk2@hotmail.com>
Date: Wed, 09 Feb 2005 23:23:59 +0000
Jerry, I shunt feed an 80 ft tower for 160 and 80 which has a two stack 4 el SteppIr's. I have been doing this for about a year with no problem. I DO retract all elements. I am pleased with the perfo
/archives//html/Topband/2005-02/msg00127.html (7,936 bytes)

4. Re: Topband: Top Loading of Shunt-fed Tower (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Wed, 9 Feb 2005 19:06:34 -0600
Jerry, I use a 3 el SteppIR at 45' on a Rohn 25G tower. The tower is also loaded for 160m using a top hat wire of about 125'. A second shunt, loads the system on 80m using a 25' top hat wire. The two
/archives//html/Topband/2005-02/msg00128.html (10,090 bytes)

5. Re: Topband: Top Loading of Shunt-fed Tower (score: 1)
Author: "Tom McAlee" <tom@klient.com>
Date: Wed, 9 Feb 2005 22:21:40 -0500
I have been following this closely because I've been curious about shunt feeding with a SteppIR as well. I have a 4 element SteppIR (32' boom) mounted at 80' and an OB2-40 at 90'. The elements on the
/archives//html/Topband/2005-02/msg00129.html (8,079 bytes)

6. Re: Topband: Top Loading of Shunt-fed Tower (score: 1)
Author: "Tom McAlee" <tom@klient.com>
Date: Thu, 10 Feb 2005 07:26:13 -0500
They seem a little reluctant to recommend it. But, one has to wonder if that is because its really a bad thing to do or because they might be held responsible for repairs if they recommend it and so
/archives//html/Topband/2005-02/msg00132.html (8,241 bytes)

7. Re: Topband: Top Loading of Shunt-fed Tower (score: 1)
Author: VR2BrettGraham <vr2bg@harts.org.hk>
Date: Thu, 10 Feb 2005 12:34:37 +0000
At VR2BG, a 5m roof tower with 3m of mast topped by a SteppIR dipole is used as a vertical on 80 & 160 against a few elevated radials (only one close to reasonance on 160). The feeder to the dipole i
/archives//html/Topband/2005-02/msg00133.html (7,132 bytes)

8. Re: Topband: Top Loading of Shunt-fed Tower (score: 1)
Author: "Tom McAlee" <tom@klient.com>
Date: Thu, 10 Feb 2005 20:34:50 -0500
I called SteppIR today and talked to Jim. He said the first time he heard of something shunt feeding a tower with a SteppIR on it he was concerned, but thus far, to his knowledge, nobody has had any
/archives//html/Topband/2005-02/msg00141.html (8,848 bytes)

9. RE: Topband: Top Loading of Shunt-fed Tower (score: 1)
Author: "Joe Subich, K4IK" <k4ik@subich.com>
Date: Thu, 10 Feb 2005 23:44:18 -0500
Tom, SteppIR uses a shielded control cable. If your tower is grounded at the base (shunt fed) and you bring the cable completely to the bottom of the tower, the only real concern would be to tie the
/archives//html/Topband/2005-02/msg00143.html (8,838 bytes)

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