Dear Uwe,
Andy, G4JNT, already provided the answer in fundamental form. I use a simple
rule that I can easily remember.
At the small distance used for measuring field strength the ground constants
do play a role and the field strength decreases in a linear way with
distance.
What I have to remember is that a radiated power of 1kW produces a FS of
300mV/m at 1km distance.
That becomes 300/5.83 = 51.46mV/m at a distance of 5.83km where I made the
measurement. The FS found was 0.370mV/m. So the radiated power was
(0.370/51.46)^2 * 1000 watt = 0.0517W.
73, Dick, PA0SE
JO22GD
----- Oorspronkelijk bericht -----
Van: jannsen <[email protected]>
Aan: <[email protected]>
Verzonden: dinsdag 14 augustus 2001 16:31
Onderwerp: Re: LF: Radiated power at PA0SE
Dick Rollema schrieb:
> To All from PA0SE
>
......................
I found a FS of 370
> microvolt/metre. From this follows an impressive radiated power (EIRP)
of 52
> milliwatt.
.............................
>
> 73, Dick, PA0SE
Dick,
you worked out / calculated that 370uV/m fieldstrength is 52mW EIRP (on
136kHz
I guess). what program did you use ?
regards
Uwe/dj8wx
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