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Total 9 documents matching your query.

1. [TowerTalk] Yagi Balun (score: 1): Author: Bee Walton <k4jld@juno.com>; Date: Fri, 18 Jul 2008 18:24:38 -0400; Three 29 year old TELREX MONOBAND yagi's are off the towers and on the ground for maintenance and repairs. The factory made and installed coax baluns will be replaced. If the baluns are replaced with; /archives//html/Towertalk/2008-07/msg00497.html (6,879 bytes)
2. Re: [TowerTalk] Yagi Balun (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Fri, 18 Jul 2008 22:08:45 -0400; I do believe that the Telrex monoband yagis employed the use of a T match in the driven element. The impedance of a T match is not 50 ohms but 400 to 600 ohms. You would probably need a 9:1 Balun. A; /archives//html/Towertalk/2008-07/msg00498.html (8,665 bytes)
3. Re: [TowerTalk] Yagi Balun (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Fri, 18 Jul 2008 22:22:02 -0400; I just looked in an old ARRL Handbook and they say that you need a 1/2 wave of 50 ohm coax to match a T to 50 ohm coax. You have to take the VF of the cable being used for the balun. ________________; /archives//html/Towertalk/2008-07/msg00499.html (8,217 bytes)
4. Re: [TowerTalk] Yagi Balun (score: 1): Author: "David Robbins K1TTT" <k1ttt@arrl.net>; Date: Sat, 19 Jul 2008 11:54:09 +0000; Keep in mind that the old telrex monobanders used a half wave phasing line to feed the two sides of a t match, this is not tuned like a gamma or driven like a split element with a balun... the impeda; /archives//html/Towertalk/2008-07/msg00503.html (9,843 bytes)
5. Re: [TowerTalk] Yagi Balun (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Sat, 19 Jul 2008 08:36:46 -0700; It is important that you determine whether the existing baluns are part of a matching network or if they are simply common mode chokes. If they ARE part of a matching network, you should replace them; /archives//html/Towertalk/2008-07/msg00507.html (8,397 bytes)
6. [TowerTalk] Yagi Balun (score: 1): Author: <walnutcreek@appstate.net>; Date: Sat, 19 Jul 2008 12:27:47 -0400; I beg to differ... I changed the baluns on my Telrex Monobanders, and a TB5EM to 1:1 Ferrite Choke Baluns that I built and they are working great with a 1:1 SWR and a max at band edge of 1.6:1 SWR. T; /archives//html/Towertalk/2008-07/msg00510.html (8,101 bytes)
7. Re: [TowerTalk] Yagi Balun (score: 1): Author: "Peter Voelpel" <df3kv@t-online.de>; Date: Sat, 19 Jul 2008 19:06:36 +0200; Typically with a t-match the matching arms are adjusted for an impedance of 200 ohms and then a halfwave coax 4:1 transformer is used for matching to 50 ohms unbalanced feedline. 73 Peter I do believ; /archives//html/Towertalk/2008-07/msg00511.html (9,875 bytes)
8. Re: [TowerTalk] Yagi Balun (score: 1): Author: "Wes Attaway $N5WA$" <wesattaway@bellsouth.net>; Date: Sat, 19 Jul 2008 14:38:37 -0500; My 5-el Telrex 20M beam used a 4:1 transformer. I no longer have that antenna but I do know that was what it used. -- Wes Attaway (N5WA) -- 1138 Waters Edge Circle - Shreveport, LA 71106 318-797-4972; /archives//html/Towertalk/2008-07/msg00518.html (9,526 bytes)
9. Re: [TowerTalk] Yagi Balun (score: 1): Author: <walnutcreek@appstate.net>; Date: Sat, 19 Jul 2008 19:19:13 -0400; My bad guys. A short Combat Nap and some chow, oh yeah....baluns I made were 4:1 Cam WA4JKW _______________________________________________ _______________________________________________ TowerTalk m; /archives//html/Towertalk/2008-07/msg00522.html (7,731 bytes)

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