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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