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RST Engineering wrote:
> Assuming a 1 microvolt (pretty numb these days) receiver at the other end
> and quarter wave vertical whips at both ends, a 5 watt transmitter has a
> THEORETICAL range of about 3000 miles. Doubling the power increases the
> range by (sqrt(2)) or a THEORETICAL range of about 4300 miles for the 10
> watter.
>
> Now since most of us will operate somewhere below the oxygen limited 12000
> MSL altitude, and presuming you are over the ocean, your range will be
> horizon ("line of sight") limited by the old familiar equation that horizon
> (in miles) is equal to 1.4 times (sqrt (altitude in feet)) or something on
> the order of 150 miles. You may get a BIT of refraction, but not enough to
> make a difference in the basic equation.
>
> The real answer is that 5 or 10 watts really doesn't make a difference in
> quiet spectrum range. It only helps "punch through" when there is a lot of
> interfering garbage on the frequency.
>
> Jim
>
1.4 Jim??
Thought it was 1.17.
http://www.boatsafe.com/kids/distance.htm
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Re: theoretical radio range....
