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1. Topband: Fw: Short Bogs (score: 1): Author: "Bruce" <k1fz@myfairpoint.net>; Date: Sun, 30 Dec 2012 10:15:27 -0800; factor, it can't be done by the insulation slowing the wave inside the shield. 73 Tom In my experience, external insulation (through synthetic covering or frost) lowers the resonant frequency of wir; /archives//html/Topband/2012-12/msg00614.html (7,964 bytes)
2. Re: Topband: Fw: Short Bogs (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Sun, 30 Dec 2012 13:33:57 -0600; The very act of laying an insulated conductor on the earth lowers its velocity factor. I forget how much, but the reduction in VF for a BOG is significant. This has been discussed at length here; you; /archives//html/Topband/2012-12/msg00615.html (7,192 bytes)
3. Re: Topband: Fw: Short Bogs (score: 1): Author: "ZR" <zr@jeremy.mv.com>; Date: Sun, 30 Dec 2012 15:04:21 -0500; If youre building a Beverage/BOG as the thread title indicates, resonance does not matter, it is a nonresonant slow wave antenna. For a resonant antenna up in the air and used for transmitting the in; /archives//html/Topband/2012-12/msg00616.html (9,919 bytes)
4. Re: Topband: Fw: Short Bogs (score: 1): Author: "Charlie Cunningham" <charlie-cunningham@nc.rr.com>; Date: Sun, 30 Dec 2012 16:55:16 -0500; Well. it's not really the "quality" of the insulation -it's its relative permittivity - relative to the permittivity of free-space (or a vacuum) The "dielectric loading" of having a layer of higher p; /archives//html/Topband/2012-12/msg00617.html (9,441 bytes)
5. Topband: Fw: Short Bogs (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Sun, 30 Dec 2012 14:01:27 -0800 (PST); Tom was not referring to the sheathing on a cable but to the velocity factor of coax. Not the same thing at all. It is well established that covering a cable with a dielectric will change its electri; /archives//html/Topband/2012-12/msg00618.html (6,690 bytes)
6. Re: Topband: Fw: Short Bogs (score: 1): Author: "Charlie Cunningham" <charlie-cunningham@nc.rr.com>; Date: Sun, 30 Dec 2012 17:34:55 -0500; All true! NL7Y was referring to coated wire, though, which is certainly different than the velocity factor of coax propagating TEM waves. I didn't know that Cebik's site is still up. That's good to k; /archives//html/Topband/2012-12/msg00619.html (7,489 bytes)
7. Re: Topband: Fw: Short Bogs (score: 1): Author: Guy Olinger K2AV <olinger@bellsouth.net>; Date: Sun, 30 Dec 2012 20:53:52 -0500; The characteristics of #12 THHN and such vary all over the map. It is not being made for use at RF. The insulation not only changes the velocity factor, but it also adds loss. This too varies all ove; /archives//html/Topband/2012-12/msg00622.html (10,808 bytes)
8. Re: Topband: Fw: Short Bogs (score: 1): Author: Bill Cromwell <wrcromwell@gmail.com>; Date: Sun, 30 Dec 2012 21:44:30 -0500; I got my THHN at the depot and the guys in there told me I can't have grey wire. Grey wire is not on the agenda for wiring appliances. I hope they don't come here to investigate THHN abuse! I um... d; /archives//html/Topband/2012-12/msg00624.html (8,344 bytes)

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