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?