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1. Topband: Bead balun waterproofing (score: 1): Author: wyc <wycpublic@gmail.com>; Date: Thu, 15 Aug 2013 22:09:25 -0700; I'm considering a bead-based common mode choke for a 160m vertical. (I've got surplus 75 ohm CATV hardline that I thought I'd bury to keep it safe from the mower, and beads seem like an easy common m; /archives//html/Topband/2013-08/msg00219.html (7,172 bytes)
2. Re: Topband: Bead balun waterproofing (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sun, 18 Aug 2013 09:48:13 -0700; Yes. Chokes made from a string of beads are generally ineffective on the HF bands, especially the lower HF bands, because they are inductive, not resistive, and because they present relatively little; /archives//html/Topband/2013-08/msg00224.html (8,689 bytes)
3. Re: Topband: Bead balun waterproofing (score: 1): Author: MU 4CX250B <4cx250b@miamioh.edu>; Date: Sun, 18 Aug 2013 22:41:48 -0600; Hi Jim, I agree that strings of ferrite beads don't present a lot of inductive reactance on the low HF bands, but you lost me with your comment about the reactance canceling the capacitive reactance; /archives//html/Topband/2013-08/msg00227.html (9,413 bytes)
4. Re: Topband: Bead balun waterproofing (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sun, 18 Aug 2013 23:28:23 -0700; On 8/18/2013 9:41 PM, MU 4CX250B wrote: I agree that strings of ferrite beads don't present a lot of inductive reactance on the low HF bands, but you lost me with your comment about the reactance can; /archives//html/Topband/2013-08/msg00228.html (9,687 bytes)
5. Re: Topband: Bead balun waterproofing (score: 1): Author: "Jim Garland" <4cx250b@miamioh.edu>; Date: Mon, 19 Aug 2013 05:50:04 -0600; Hi Jim, I think we may talking at cross purposes! I certainly agree with your explanation about how a choke is in the common mode circuit, but not the differential circuit. In fact, that just what I; /archives//html/Topband/2013-08/msg00229.html (11,615 bytes)
6. Re: Topband: Bead balun waterproofing (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Mon, 19 Aug 2013 10:39:29 -0400; I agree that strings of ferrite beads don't present a lot of inductive reactance on the low HF bands, but you lost me with your comment about the reactance canceling the capacitive reactance of the c; /archives//html/Topband/2013-08/msg00231.html (11,640 bytes)
7. Re: Topband: Bead balun waterproofing (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Mon, 19 Aug 2013 08:00:33 -0700; On 8/19/2013 4:50 AM, Jim Garland wrote: In other words, I believe a common mode inductance always reduces the common mode currents along the feedline, as one can easily visualize by drawing out the; /archives//html/Topband/2013-08/msg00232.html (10,008 bytes)

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