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1. [TowerTalk] 4:1 balun questions KT-34XA (score: 1): Author: "Paul " <radioboy@telus.net>; Date: Mon, 27 Oct 2014 22:37:41 -0700; Hi Guys, Getting ready to put up my KT-34XA this weekend and just trying to get the balun right. I have been experimenting this week with cores and windings and have found a combo that sure looks goo; /archives//html/Towertalk/2014-10/msg00384.html (7,530 bytes)
2. Re: [TowerTalk] 4:1 balun questions KT-34XA (score: 1): Author: "Richard (Rick) Karlquist" <richard@karlquist.com>; Date: Tue, 28 Oct 2014 10:21:50 -0700; Your choice of MPP is very unorthodox. MPP = moly permalloy powder. Generally, ferrite is used for baluns. It is also used for some tuned circuits but powered iron has some advantages for tuned circu; /archives//html/Towertalk/2014-10/msg00390.html (9,197 bytes)
3. Re: [TowerTalk] 4:1 balun questions KT-34XA (score: 1): Author: "Paul " <radioboy@telus.net>; Date: Tue, 28 Oct 2014 10:33:20 -0700; HI Rick, Thank you for the reply. Well, perhaps we are onto something here...I am using what I have in my collection of ferrites, which is a rather large shoe box full. From what I have been reading,; /archives//html/Towertalk/2014-10/msg00418.html (11,153 bytes)
4. Re: [TowerTalk] 4:1 balun questions KT-34XA (score: 1): Author: "Paul " <radioboy@telus.net>; Date: Tue, 28 Oct 2014 11:11:58 -0700; Further reading... Looking at Fair-Rite catalog of toroids, mix 61 which seems to be very popular and recommended for HF baluns, has a mu of 125, and Al (nH/T2) of 170 for a 2.4" dia core. The Arnold; /archives//html/Towertalk/2014-10/msg00419.html (8,835 bytes)
5. Re: [TowerTalk] 4:1 balun questions KT-34XA (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Wed, 29 Oct 2014 09:19:56 -0700; Looking at Fair-Rite catalog of toroids, mix 61 which seems to be very popular and recommended for HF baluns, has a mu of 125, and Al (nH/T2) of 170 for a 2.4" dia core. The Arnold MPP core, which is; /archives//html/Towertalk/2014-10/msg00422.html (10,240 bytes)
6. [TowerTalk] 4:1 balun questions KT-34XA (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Thu, 30 Oct 2014 00:08:06 -0700; There's a tutorial discussion that may help you understand ferrite materials and how to choose them in k9yc.com/RFI-Ham.pdf Most of the tutorial is aimed at using ferrites to build common mode chokes; /archives//html/Towertalk/2014-10/msg00438.html (10,888 bytes)
7. Re: [TowerTalk] 4:1 balun questions KT-34XA (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Thu, 30 Oct 2014 16:35:17 -0700; the 4:1 balun. The xfmr does the 200 ohm down to 50 ohm job. Then the 1:1 current choke kills the current on the outside of the coax. Exactly. 73, Jim K9YC ___________________________________________; /archives//html/Towertalk/2014-10/msg00446.html (9,001 bytes)

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