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Omega One Radio is back on the air
On 6 Nov 2006 16:31:39 -0800, N9OGL wrote:
: : Steve, I suggest you read Part 15, Part 15 has nothing to do with power : (in Wattage) it has to do with the field strength (maininly the : electrical field of the electromaganetic wave) you can put out 100 : watts and still have the field strength as prescribed under part 15 (on : 13.556 MHz it 15,848 microvolts per meter at a distance of 30 meters : (90 Feet) CB radio's which run 4 - 5 watts is 10,000 microvolts per : meter at 30 meters.....but you wouldn't know anything about that now Odd. If you take the formula for an isotropic radiator emitting P watts and solve it for the electric field, e, you come up with e = sqr(30*P)/r at a distance of "r" meters (see my earlier posts). For a power of 5 watts at a distance of 30 meters, that becomes e = sqr(30*5)/30 = 0.408 volts/meter = 408,000 microvolts/meter. That number is 400 times larger than the value you quoted. Where in the heck are you obtaining figures like 10,000 microvolts/meter? Have you been consulting Woger again? |
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