Hejsan Christer,
Just curious - how do you calculate your Fs.
0.3 W at 2 km should give 68 dB(uV/m)
0.6 W at 2 km should give 71 dB(uV/m)
Both calculating and measuring Fs is difficult.
Main point is that you have very good signal!!
de Väinö, OH2LX
At 22:09 27.2.2000 +0100, you wrote:
Hello All
Thanks to PA0SE for suggesting the calibration method.
I tried this method this evening and believe I'm somewhat closer to the
truth...
Obviously the measuring loop with the connection wiring was resonant far
lower in frequency than expected. This made the figures a bit optimistic.
Now I have a 6,3 dB difference between calculated (2,4 W) and measured
radiated power (0,65 W).
More details on my home page
http://home5.swipnet.se/~w-54761/fs.htm
73
Christer
SM6PXJ
GROUND WAVE FIELD-STRENGTH, MILLINGTON METHOD
GW LF Ham 136. kHz
FIELD-STRENGTH DB ABOVE 1 MICROVOLT/METER
EPS =10.0 SIG = .5 mS/m FREQ = 136. kHz POWER = .30 W
DIST. (KM) F-S (dBuV/m)
1.0 74.1
2.0 68.0
3.0 64.3
4.0 61.7
5.0 59.7
6.0 58.0
7.0 56.5
8.0 55.3
9.0 54.2
10.0 53.2
30.0 41.7
50.0 35.0
70.0 30.4
90.0 26.6
END OF CIRCUIT
LOPPU
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V.K.Lehtoranta, OH2LX, POBox 50, FIN-05401 Jokela, Finland
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