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21. Re: [TowerTalk] CATV & Phone grounds (score: 1): Author: "Keith Dutson" <kdutson@sbcglobal.net>; Date: Tue, 11 Jul 2006 16:32:50 -0500; Excellent explanation Roger. Thanks. BTW, the surface of the sun is something like 10,000 deg K. I think the air next to lightning plasma is about 30,000 deg K. 73, Keith NM5G Plasma can be created w; /archives//html/Towertalk/2006-07/msg00363.html (14,327 bytes)
22. Re: [TowerTalk] CATV & Phone grounds (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Tue, 11 Jul 2006 15:31:04 -0700; The standard model of a lightning impulse is what's called a "double exponential" with a fast rise (2 microseconds to peak) and a slow fall (50 microseconds to 50%). (i(t) = (1-exp(-t/A))*exp(-t/B) w; /archives//html/Towertalk/2006-07/msg00364.html (10,084 bytes)
23. Re: [TowerTalk] CATV & Phone grounds (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Tue, 11 Jul 2006 15:49:40 -0700; Around 20,000K, as it happens. Determined from spectroscopic measurements of the lightning. Interestingly, a plas cutter is hotter than lightning. Truly a useful tool.. Not really.. There's a fundame; /archives//html/Towertalk/2006-07/msg00365.html (12,402 bytes)
24. Re: [TowerTalk] CATV & Phone grounds (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Tue, 11 Jul 2006 22:47:58 -0700; First, think of the current flow in the output stage of any electronic amplifier. The instantaneous current flow has a DC bias -- that is, it is always flowing in the same direction -- but it has str; /archives//html/Towertalk/2006-07/msg00374.html (10,075 bytes)

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