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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Antennaware\]\s+160\s+meter\s+3\/8\s+wire\,\s+steel\s+or\s+copper\s*$/: 12 ]

Total 12 documents matching your query.

1. [Antennaware] 160 meter 3/8 wire, steel or copper (score: 1)
Author: "OZ1AXG Flam" <oz1axg.nospam@dxmail.dk>
Date: Wed, 24 Sep 2008 20:21:36 +0200
Hi A question about wire ... I have constructed a 3/8 for 160 meter. I use the tower to support the antenna. It runs 22 meter vertically and then (horisontal for 24,5 meters (i.e. total 46.5 meter).
/archives//html/Antennaware/2008-09/msg00010.html (7,404 bytes)

2. Re: [Antennaware] 160 meter 3/8 wire, steel or copper (score: 1)
Author: Terry Conboy <n6ry@arrl.net>
Date: Wed, 24 Sep 2008 12:11:17 -0700
Flam, I modeled this with EZNEC (without the tower) and assumed the 1.5 mm diameter stainless steel wire has a resistivity of 7.2 e-7 ohm-m and relative permeability of 1.02. I estimated about 20 ohm
/archives//html/Antennaware/2008-09/msg00011.html (8,704 bytes)

3. Re: [Antennaware] 160 meter 3/8 wire, steel or copper (score: 1)
Author: "Joe, aa4nn" <aa4nn@earthlink.net>
Date: Wed, 24 Sep 2008 15:42:20 -0500 (GMT-05:00)
Your 3/8 wave 160 Inv L should be more like 58m in length. Then your series feeding capacitor would be more like 225mmf. Try to find a variable capacitor to adjust the Inv L to freq of choice. de Joe
/archives//html/Antennaware/2008-09/msg00012.html (10,334 bytes)

4. Re: [Antennaware] 160 meter 3/8 wire, steel or copper (score: 1)
Author: Terry Conboy <n6ry@arrl.net>
Date: Wed, 24 Sep 2008 14:13:35 -0700
Using 2.5 mm vs. 1.5 mm diameter copper only increases the gain by about 0.1 dB. The feedpoint R is about 1 ohm lower, and the bandwidth increases by about 4 kHz. The resonance moves up by 13 kHz to
/archives//html/Antennaware/2008-09/msg00013.html (10,627 bytes)

5. Re: [Antennaware] 160 meter 3/8 wire, steel or copper (score: 1)
Author: "K9AY" <k9ay@k9ay.com>
Date: Wed, 24 Sep 2008 16:44:25 -0500
Flam, Based on your description and measurements, I am certain that proximity to the tower is affecting the impedance matching. I was able to obtain similar results modeling the tower about 30m tall.
/archives//html/Antennaware/2008-09/msg00015.html (10,175 bytes)

6. Re: [Antennaware] 160 meter 3/8 wire, steel or copper (score: 1)
Author: "OZ1AXG Flam" <oz1axg.nospam@dxmail.dk>
Date: Wed, 24 Sep 2008 23:50:04 +0200
Hi Terry ok, 0.1 db thats not worth it ... especially when i already have 100m Cu 1.5mm lying around ... I hope not to have to change the Cap, since this part of the project is already done, with mec
/archives//html/Antennaware/2008-09/msg00016.html (11,960 bytes)

7. Re: [Antennaware] 160 meter 3/8 wire, steel or copper (score: 1)
Author: "OZ1AXG Flam" <oz1axg.nospam@dxmail.dk>
Date: Thu, 25 Sep 2008 00:06:54 +0200
Hi Gary Yes the distance to the tower has influenced the matching a lot ... besides the 22.5 tower theres also two 80 meter sloopers and 1 inverted V 160 meter dipole - altogether making the antenna
/archives//html/Antennaware/2008-09/msg00017.html (12,107 bytes)

8. Re: [Antennaware] 160 meter 3/8 wire, steel or copper (score: 1)
Author: Terry Conboy <n6ry@arrl.net>
Date: Wed, 24 Sep 2008 14:24:11 -0700
Yes, Flam's 46.5m wire is only about 0.29 wl. However, making it longer would raise the feedpoint Z even higher. There might be a slight improvement in efficiency, but usually most of the extra signa
/archives//html/Antennaware/2008-09/msg00018.html (8,614 bytes)

9. Re: [Antennaware] 160 meter 3/8 wire, steel or copper (score: 1)
Author: "OZ1AXG Flam" <oz1axg.nospam@dxmail.dk>
Date: Thu, 25 Sep 2008 02:28:46 +0200
Hi Terry It would be better to have the antenna at resonans around 1830 (CW portion of the band), rather than 1860 where it is now , but this is where it endend up with the fixed capacitors. So if i
/archives//html/Antennaware/2008-09/msg00019.html (9,675 bytes)

10. Re: [Antennaware] 160 meter 3/8 wire, steel or copper (score: 1)
Author: "Joe, aa4nn" <aa4nn@earthlink.net>
Date: Wed, 24 Sep 2008 20:42:13 -0500 (GMT-05:00)
Dr OM Flam, Not only does the tower affect your INV L, now you have let us know of the 80m slopers and another 160m antenna. These wire antennas have drastically more influence on your INV L than you
/archives//html/Antennaware/2008-09/msg00020.html (9,376 bytes)

11. Re: [Antennaware] 160 meter 3/8 wire, steel or copper (score: 1)
Author: "OZ1AXG Flam" <oz1axg.nospam@dxmail.dk>
Date: Thu, 25 Sep 2008 08:46:23 +0200
Hi Joe Yes, i know, there are many odds againt it beeing a perfect antenna. But that how it is with this super limited space. But what im going for is some vertical radiation, to get some low angale
/archives//html/Antennaware/2008-09/msg00021.html (10,396 bytes)

12. Re: [Antennaware] 160 meter 3/8 wire, steel or copper (score: 1)
Author: "OZ1AXG Flam" <oz1axg.nospam@dxmail.dk>
Date: Sun, 28 Sep 2008 03:11:59 +0200
Hi Just a follow up on the question about replacing the steel wire with copper wire. Today we replaced the steel wire with copper wire. Also, a 100pF in the cap box was replaced with a 150pF adding 5
/archives//html/Antennaware/2008-09/msg00023.html (11,153 bytes)


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