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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+folded\s+dipole\s*$/: 28 ]

Total 28 documents matching your query.

1. [TowerTalk] folded dipole (score: 1)
Author: w9ol@dataflo.net (Bill Heinzinger)
Date: Wed, 10 Nov 1999 10:20:35 -0600
I've seen ads for a Barker/Williamson folded dipole for 160 thru 10. It's only 90 some feet overall. Anyone use this design and does it work. Does anyone have formulas/instructions for making somethi
/archives//html/Towertalk/1999-11/msg00187.html (7,484 bytes)

2. [TowerTalk] folded dipole (score: 1)
Author: philk5pc@tyler.net (Phil Clements)
Date: Wed, 10 Nov 1999 10:29:56 -0600
I played with one of these years ago. At the top center of the dipole there is a big 800 ohm non-inductive resistor. What you really have is a dummy load with a very lossy transmission line feeding
/archives//html/Towertalk/1999-11/msg00188.html (7,834 bytes)

3. [TowerTalk] folded dipole (score: 1)
Author: w9ol@dataflo.net (Bill Heinzinger)
Date: Wed, 10 Nov 1999 11:10:57 -0600
Thanks to all who replied. Confirmed my suspicions. -- When PEOPLE lead fearlessly, the LEADERS follow faithfully. Bill homepage at http://www.dataflo.net/~w9ol -- FAQ on WWW: http://www.contesting.c
/archives//html/Towertalk/1999-11/msg00189.html (7,189 bytes)

4. [TowerTalk] folded dipole (score: 1)
Author: k4sb@mindspring.com (K4SB)
Date: Wed, 10 Nov 1999 17:46:49 +0000
Ah, here is a juicy nugget....Just what is the power rating on that resistor? 600 OHM BIG resistors for Rhombics, Vs, ect....are hard to find. 73 Ed -- FAQ on WWW: http://www.contesting.com/towertal
/archives//html/Towertalk/1999-11/msg00191.html (7,373 bytes)

5. [TowerTalk] folded dipole (score: 1)
Author: k0il@mitec.net" <k0il@mitec.net (Ed - K0iL)
Date: Wed, 10 Nov 1999 21:13:58 -0600
would One of these is installed where I work for a Y2K back-up (actually back-up to our back-up--sat phones) to allow regional communications among MAPP utilities. It does work, that is it has very b
/archives//html/Towertalk/1999-11/msg00199.html (8,972 bytes)

6. [TowerTalk] Folded dipole (score: 1)
Author: "Tom Osborne" <w7why@verizon.net>
Date: Mon, 24 Aug 2009 19:22:45 -0700
Hi All Looking to put up another 40 meter antenna. Need a NVIS antenna for close-in work. Is there any reason to put up a folded dipole instead of a tuned-feeder dipole? I think when this antenna was
/archives//html/Towertalk/2009-08/msg00478.html (7,237 bytes)

7. Re: [TowerTalk] Folded dipole (score: 1)
Author: Martin Ewing <martin.s.ewing@gmail.com>
Date: Mon, 24 Aug 2009 22:36:13 -0400
The folded dipole will have wider bandwidth than a simple dipole, because of the wire separation (and maybe other reasons). The big advantage in the old days (and now if you want it) is that the impe
/archives//html/Towertalk/2009-08/msg00479.html (8,059 bytes)

8. Re: [TowerTalk] Folded dipole (score: 1)
Author: jimlux <jimlux@earthlink.net>
Date: Tue, 25 Aug 2009 06:54:28 -0700
The folded dipole *might* get the impedance to a better value for the tuner. To a first order, a folded dipole has 4x the feedpoint impedance of the straight dipole. If you were talking about the ter
/archives//html/Towertalk/2009-08/msg00483.html (8,014 bytes)

9. Re: [TowerTalk] Folded dipole (score: 1)
Author: Martin Ewing <martin.s.ewing@gmail.com>
Date: Tue, 25 Aug 2009 10:50:56 -0400
I ran a B&W terminated dipole for years, and got some useful results. (when there were sunspots) However, it has a gain of something like -6 dB, depending on frequency. I.e., about 75% of your power
/archives//html/Towertalk/2009-08/msg00486.html (9,164 bytes)

10. Re: [TowerTalk] Folded dipole (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 25 Aug 2009 11:10:15 -0400
But only on a single band (or at best 80/30, 40/15 meters). Unlike the "normal" dipole/doublet the folded dipole presents a zero Ohm (very low impedance) load to the feedline at all 2n harmonics. As
/archives//html/Towertalk/2009-08/msg00487.html (10,475 bytes)

11. Re: [TowerTalk] Folded dipole (score: 1)
Author: Rick Stealey <rstealey@hotmail.com>
Date: Tue, 25 Aug 2009 15:48:04 +0000
A big advantage is that it is a much better match to an open-wire feeder. This means there will be far less impedance changes vs feedline length or frequency change. So the impedance you get at the
/archives//html/Towertalk/2009-08/msg00489.html (8,552 bytes)

12. Re: [TowerTalk] Folded dipole (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 25 Aug 2009 08:55:14 -0700
If you're going to the trouble of two wires, I STRONGLY recommend a simple 80/40 fan. I've got two of them at right angles up 100 ft, fed with RG11, and they work quite well. In addition to 80 and 40
/archives//html/Towertalk/2009-08/msg00490.html (7,971 bytes)

13. Re: [TowerTalk] Folded dipole (score: 1)
Author: Andy <ai.egrps@gmail.com>
Date: Tue, 25 Aug 2009 12:39:44 -0400
NVIS implies low, and dipoles mounted that low can have quite a low feedpoint impedance. Using a folded dipole can help counteract that. People have used a low mounted folded dipole fed by coax, usi
/archives//html/Towertalk/2009-08/msg00491.html (8,300 bytes)

14. Re: [TowerTalk] Folded dipole (score: 1)
Author: Hector Garcia XE2K <j_hector_garcia@sbcglobal.net>
Date: Tue, 25 Aug 2009 10:32:49 -0700 (PDT)
Hi Tom Few years ago a made a  loop antenna  based on the idea of the folded  dipole, my antenna was installed for the short range communication like you mention , in this case the  CA and NW of Mexi
/archives//html/Towertalk/2009-08/msg00492.html (9,921 bytes)

15. Re: [TowerTalk] Folded dipole (score: 1)
Author: "Jim Hargrave" <w5ifp@gvtc.com>
Date: Tue, 25 Aug 2009 11:03:08 -0800
Joe, You woke up a memory from the past. The first antenna I built after getting my license in 1954 was the T2FD. I strung it from a tree top down to the ground near the house. I found a surplus 500
/archives//html/Towertalk/2009-08/msg00493.html (9,007 bytes)

16. Re: [TowerTalk] Folded dipole (score: 1)
Author: "Steve, W3AHL" <w3ahl@att.net>
Date: Tue, 25 Aug 2009 14:28:26 -0400
One of the best technical presentations on NVIS propagation and antennas is at: http://groups.yahoo.com/group/wl2kemcomm Look in the files section for NVIS_Presentation_R1-4-8a.pdf by WA5BEN. You nee
/archives//html/Towertalk/2009-08/msg00496.html (10,161 bytes)

17. Re: [TowerTalk] Folded dipole (score: 1)
Author: "knormoyle@surfnetusa.com" <knormoyle@surfnetusa.com>
Date: Tue, 25 Aug 2009 11:28:42 -0700
I have a folded dipole up for 80m with a shorter coupled resonator (dipole) inside it to improve 2:1 SWR bandwidth to the full band. (so it looks like 3 wires) Fed with ladderline. 6:1 current balun
/archives//html/Towertalk/2009-08/msg00497.html (8,544 bytes)

18. Re: [TowerTalk] Folded dipole (score: 1)
Author: Tom Horton <k5iid@sbcglobal.net>
Date: Tue, 25 Aug 2009 11:57:57 -0700 (PDT)
Back in the day (1950s) I used folded dipoles. The beauty of a simple folded dipole was that you could use 300 ohm TV twinlead to make and feed the antenna. No need for an antenna tuner. The matching
/archives//html/Towertalk/2009-08/msg00499.html (10,110 bytes)

19. Re: [TowerTalk] Folded dipole (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 25 Aug 2009 15:19:53 -0400
Maximum NVIS signal occurs when the antenna is 1/4 wave above ground (33 -35' on 40 meters) - not at 1/8 wave (16'). Any analysis that recommends heights at or below 1/8 wave is flawed in that ground
/archives//html/Towertalk/2009-08/msg00502.html (12,557 bytes)

20. Re: [TowerTalk] Folded dipole (score: 1)
Author: K4SAV <RadioIR@charter.net>
Date: Tue, 25 Aug 2009 17:05:10 -0500
Maximum gain at 90 degrees elevation for a 40 meter dipole is at 27 ft above average ground. Anything between 23 and 33 ft will be within 0.1 dB of that. It doesn't vary a lot with ground quality, al
/archives//html/Towertalk/2009-08/msg00511.html (9,839 bytes)


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