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Total 33 documents matching your query.

1. [TowerTalk] Balun for G5RV (score: 1): Author: John Geiger <aa5jg@fidmail.com>; Date: Mon, 31 Jan 2011 11:31:50 -0600; I have a G5RV type homebrew dipole that has been up for the past 11 years and I am now planning on doing some maintainance and replacing the coax and balun on it, and cleaning and redoing all connect; /archives//html/Towertalk/2011-01/msg00477.html (7,128 bytes)
2. Re: [TowerTalk] Balun for G5RV (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Tue, 01 Feb 2011 08:53:52 +0000; John, In what I would call the "classic" version of the G5RV the ladderline section needs to be an electrical half-wave on 20m - that usually works out at just over 30ft, not the 20ft you are using.; /archives//html/Towertalk/2011-02/msg00000.html (8,829 bytes)
3. Re: [TowerTalk] Balun for G5RV (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Tue, 01 Feb 2011 10:14:08 -0800; You can roll your own for about $10 that will be FAR better than anything you can buy at any price. See Fig 48 and the Choke Cookbook in http://audiosystemsgroup.com/RFI-Ham.pdf Use the version of th; /archives//html/Towertalk/2011-02/msg00004.html (7,791 bytes)
4. Re: [TowerTalk] Balun for G5RV (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Tue, 1 Feb 2011 10:36:38 -0800; Alternately, you can make these out of "monster" speaker cable or 12 gauge low voltage sprinkler zip cord, both available at Home Depot, et al. Rick _______________________________________________ __; /archives//html/Towertalk/2011-02/msg00006.html (8,023 bytes)
5. Re: [TowerTalk] Balun for G5RV (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Tue, 01 Feb 2011 11:40:27 -0800; One advantage of THHN is that the insulation is rated for 650 volts RMS. That yields 1300V between conductors, so the choke will tolerate significant SWR. A second advantage is cost -- THHN is really; /archives//html/Towertalk/2011-02/msg00008.html (8,295 bytes)
6. Re: [TowerTalk] Balun for G5RV (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Tue, 01 Feb 2011 11:51:12 -0800; And, THHN is good to 90C. I don't know what the speaker wire is good to. I note that some SPT-2 zipcord is rated to 105C (others are rated to 60C... gotta read the specsheet or markings) ____________; /archives//html/Towertalk/2011-02/msg00009.html (8,313 bytes)
7. Re: [TowerTalk] Balun for G5RV (score: 1): Author: "David Jordan" <Wa3gin@comcast.net>; Date: Tue, 1 Feb 2011 15:14:11 -0500; I used Teflon coated #14 gauge silver wire to wind a 160-20m 4:1 2Kw balun on three cores. The thing has been working great for over 20yrs with legal limit feeding 450ohm ladder line to 160m dipole.; /archives//html/Towertalk/2011-02/msg00010.html (9,085 bytes)
8. Re: [TowerTalk] Balun for G5RV (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Tue, 1 Feb 2011 13:19:14 -0800; I meant to say "low voltage lighting" zip cord. It has very thick insulation. Although meant to operate at 12V, it should be good for many 100's of volts. HD sells a generic version of the famous nam; /archives//html/Towertalk/2011-02/msg00011.html (8,613 bytes)
9. Re: [TowerTalk] Balun for G5RV (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Tue, 01 Feb 2011 21:43:11 +0000; Be aware that if you're tempted to use the G5RV on a band where the VSWR(50) is high, the 1:1 balun windings may need to withstand some quite high voltages. For example, on 30m at 1400W the voltage b; /archives//html/Towertalk/2011-02/msg00012.html (8,462 bytes)
10. Re: [TowerTalk] Balun for G5RV (score: 1): Author: DGB <ns9i2016@gmail.com>; Date: Tue, 01 Feb 2011 15:57:27 -0600; And is it acceptable to enclose them in a non-conductive enclosure Jim, even at high power (1500w)? We can get ice 3" thick sometimes! 73 Dwight NS9I _______________________________________________ _; /archives//html/Towertalk/2011-02/msg00014.html (9,301 bytes)
11. Re: [TowerTalk] Balun for G5RV (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Tue, 01 Feb 2011 22:24:28 +0000; Here are a couple of simple calculations based on EZNEC predictions of the impedance at the end of the G5RV ladderline - where the 1:1 balun operates: 40m: Z = 27-j78 At the 1500W level, I = 7.5A rms; /archives//html/Towertalk/2011-02/msg00015.html (8,643 bytes)
12. Re: [TowerTalk] Balun for G5RV (score: 1): Author: "Steve Jones" <n6sj@earthlink.net>; Date: Tue, 1 Feb 2011 14:27:41 -0800; So who would be running 1400W on 30M....? Not I, said the duck! 73 Steve N6SJ _______________________________________________ _______________________________________________ TowerTalk mailing list To; /archives//html/Towertalk/2011-02/msg00016.html (9,990 bytes)
13. Re: [TowerTalk] Balun for G5RV (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Tue, 01 Feb 2011 22:41:12 +0000; Apologies - I don't avidly read US band plans and power limits ;) So, try 1500W on 10m instead: peak voltage = 2.88kV 73, Steve G3TXQ _______________________________________________ _________________; /archives//html/Towertalk/2011-02/msg00018.html (8,866 bytes)
14. Re: [TowerTalk] Balun for G5RV (score: 1): Author: "Mike" <noddy1211@sbcglobal.net>; Date: Tue, 1 Feb 2011 14:55:32 -0800; I think our power limits are way better than yours in the UK (400 watts). We only have 200 watts on 30 meters though, except when working VP8ORK and then it appears many can run at least 1500 watts ;; /archives//html/Towertalk/2011-02/msg00019.html (9,470 bytes)
15. Re: [TowerTalk] Balun for G5RV (score: 1): Author: Michael Tope <W4EF@ca.rr.com>; Date: Tue, 01 Feb 2011 11:56:19 -0800; FWIW, #14 AWG Solid THHN is running $42 per 500' roll at the Home Depots in Southern California. 73, Mike W4EF............. _______________________________________________ ___________________________; /archives//html/Towertalk/2011-02/msg00020.html (9,421 bytes)
16. Re: [TowerTalk] Balun for G5RV (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Tue, 01 Feb 2011 17:42:35 -0800; 100s of volts I'll go for (probably 300V for the UL listing).. However, that stuff has a low melting point AND having that much insulation on it means that it has a hard time dissipating the heat. I'; /archives//html/Towertalk/2011-02/msg00021.html (10,361 bytes)
17. Re: [TowerTalk] Balun for G5RV (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Tue, 01 Feb 2011 17:53:39 -0800; rated at 600V means that it can be used in a 600Vrms system, where it will have to withstand surges of more than that without breakdown. The actual breakdown voltage is substantially higher. In reali; /archives//html/Towertalk/2011-02/msg00022.html (9,866 bytes)
18. Re: [TowerTalk] Balun for G5RV (score: 1): Author: DGB <ns9i2016@gmail.com>; Date: Tue, 01 Feb 2011 20:20:45 -0600; .... and I repeat .... is it acceptable to enclose it in a non-conductive enclosure, on a multiband antenna, say resonant on 160 or 80, especially at high power (1500w)? 73 Dwight NS9I ______________; /archives//html/Towertalk/2011-02/msg00023.html (11,302 bytes)
19. Re: [TowerTalk] Balun for G5RV (score: 1): Author: DGB <ns9i2016@gmail.com>; Date: Tue, 01 Feb 2011 20:29:30 -0600; Who is the moderator or ruler of this list ? Why is it my replies don't come out on this reflector till hours later .... sheesh ... moderator review? de ns9i _________________________________________; /archives//html/Towertalk/2011-02/msg00024.html (8,492 bytes)
20. Re: [TowerTalk] Balun for G5RV (score: 1): Author: "Mike" <noddy1211@sbcglobal.net>; Date: Tue, 1 Feb 2011 18:49:18 -0800; Works fine for me within seconds, all posts from Wisconsin are moderated Who is the moderator or ruler of this list ? Why is it my replies don't come out on this reflector till hours later .... shees; /archives//html/Towertalk/2011-02/msg00025.html (9,182 bytes)

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