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Total 7 documents matching your query.

1. Topband: Chokes - ferrite vs air (score: 1): Author: g4ifb@totalise.co.uk (Gary Hinson); Date: Thu, 14 Jun 2001 12:00:18 +0100; Folks, I've used home-brewed and commercial "QRO" ferrite choke 'baluns' before. With QRO and hi-SWR, they get warm, sometimes hot to the touch: I guess that's the result of choking off the power on; /archives//html/Topband/2001-06/msg00029.html (8,085 bytes)
2. Topband: Chokes - ferrite vs air (score: 1): Author: nr1dx@tellink.net (NR1DX); Date: Thu, 14 Jun 2001 11:48:58 +0000; All Check out the URL below on some actual measurements of coiled versus ferrite chokes. Unfortunately the data at the time was aimed towards beam applications and the data only covers coils up thoug; /archives//html/Topband/2001-06/msg00030.html (7,606 bytes)
3. Topband: Chokes - ferrite vs air (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Thu, 14 Jun 2001 15:17:20 +0200; It's possible to use air core chokes, I mean chokes made with coaxial cable, if the reactance is large enough. In 160m this is easier since an RG58 wound on a plastic cylinder can be used and withst; /archives//html/Topband/2001-06/msg00031.html (7,565 bytes)
4. Topband: Chokes - ferrite vs air (score: 1): Author: jon.zaimes@dol.net (Jon Zaimes AA1K); Date: Thu, 14 Jun 2001 14:43:04 +0100; ON/G4iFB: I use air-wound chokes on various feedlines and control cables going up my insulated, series-fed 160-meter vertical (Rohn 25 tower). These chokes are right at the base of the tower and keep; /archives//html/Topband/2001-06/msg00033.html (7,960 bytes)
5. Topband: Chokes - ferrite vs air (score: 1): Author: Jay E Ostrem" <wc7m@vcn.com (Jay E Ostrem); Date: Thu, 14 Jun 2001 17:14:27 -0000; AA1K: I had a similar experience on my series fed tower. It was a 130ft tower made of Rohn 25G. The insulating section was 10ft up. The tower was inductive (too long) due to the leaky power line insu; /archives//html/Topband/2001-06/msg00034.html (8,607 bytes)
6. Topband: Chokes - ferrite vs air (score: 1): Author: w8ji@akorn.net (Tom Rauch); Date: Sat, 16 Jun 2001 05:52:57 -0400; Hi Gary, The problem isn't saturation, it's good old fashioned dissipation. Most ferrites have fairly low Q on higher frequencies. 73 material has a Q of one around 2 MHz or so. While this doesn't hu; /archives//html/Topband/2001-06/msg00040.html (9,723 bytes)
7. Topband: Chokes - ferrite vs air (score: 1): Author: n0tt1@juno.com (n0tt1@juno.com); Date: Mon, 18 Jun 2001 03:32:18 +0100; Hi Gary, While doing some reading in ON4UN's latest book I ran across some info about "air core" chokes....page 7.20, last paragraph of section 9.2 regarding isolating feedlines with various kinds of; /archives//html/Topband/2001-06/msg00044.html (7,428 bytes)

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