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Total 29 documents matching your query.

21. Re: [TowerTalk] Coax, conduit and toroids (score: 1): Author: "Perry - K4PWO" <k4pwo@comcast.net>; Date: Wed, 27 Jun 2012 20:23:41 -0500; I only had mine down a foot as I was crossing buried 220 volt AC lines that were down about 4 feet (according to power company - I didn't see any signs of them). I also have very rocky soil with lots; /archives//html/Towertalk/2012-06/msg00264.html (13,596 bytes)
22. Re: [TowerTalk] Coax, conduit and toroids (score: 1): Author: "Rick Kiessig" <kiessig@gmail.com>; Date: Thu, 28 Jun 2012 18:30:36 +1200; Actually, ferrites are relatively inexpensive as imports go. I get them from Mouser (great company to deal with; highly recommended). My last order was a few years ago. For 22 x 2.4-inch #31 toroids,; /archives//html/Towertalk/2012-06/msg00265.html (10,441 bytes)
23. Re: [TowerTalk] Coax, conduit and toroids (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Wed, 27 Jun 2012 23:54:03 -0700; Ferrite cores are almost universally useful if you're active on the HF bands, so it makes sense to get a group purchase together and buy in quantity. The thing that got me started on the extensive re; /archives//html/Towertalk/2012-06/msg00266.html (9,957 bytes)
24. Re: [TowerTalk] Coax, conduit and toroids (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Thu, 28 Jun 2012 08:14:04 +0100; Roger, Take a look at the 1:1 Guanella current balun - it's identical to one of Jim's CM chokes. It achieves current balance by impeding common-mode currents. They are the same thing! 73, Steve G3TXQ; /archives//html/Towertalk/2012-06/msg00267.html (12,366 bytes)
25. Re: [TowerTalk] Coax, conduit and toroids (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Thu, 28 Jun 2012 09:14:09 +0100; For those who still have an open mind on whether or not antenna system balance guarantees zero voltage across the CM choke, I've sketched an equivalent circuit showing various currents, voltages and; /archives//html/Towertalk/2012-06/msg00268.html (11,230 bytes)
26. Re: [TowerTalk] Coax, conduit and toroids (score: 1): Author: "Rick Kiessig" <kiessig@gmail.com>; Date: Fri, 29 Jun 2012 03:16:28 +1200; Speaking of toroids, can someone point me to a good set of design rules for true current-type (multi-core) baluns / impedance transformers, of the type you might use to match a range of dipole-type a; /archives//html/Towertalk/2012-06/msg00269.html (10,387 bytes)
27. Re: [TowerTalk] Coax, conduit and toroids (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Thu, 28 Jun 2012 12:36:31 -0700; Nor would it be the first time that someone didn't understand the circuit or the model. "I don't know of any way to accurately model common-mode effects on a two-wire transmission line (that is, how; /archives//html/Towertalk/2012-06/msg00273.html (11,777 bytes)
28. Re: [TowerTalk] Coax, conduit and toroids (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Thu, 28 Jun 2012 22:38:28 +0100; "A radiating coaxial cable can be modeled quite well with a combination of transmission line model and a wire. The transmission line model represents the inside of the coax, and the wire represents t; /archives//html/Towertalk/2012-06/msg00274.html (10,972 bytes)
29. Re: [TowerTalk] Coax, conduit and toroids (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Thu, 28 Jun 2012 16:50:20 -0700; How many times must I repeat that I am talking about a BALANCED SYSTEM are about antennas fed with PARALLEL WIRE LINES, NOT COAX? 73, Jim K9YC _______________________________________________ ________; /archives//html/Towertalk/2012-06/msg00277.html (10,487 bytes)

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