Hi Alan and LF,
I know there are some of you who can easily answer my question that follows :-)
The maximum distance of the groundwave at a specific fieldstrength E is (about)
linear increasing with the antenna current of the TX antenna, right?
So, if i have an antenna current of 0,5A and get a maximum distance of 1000km,
i would reach 2000km with 1A (same RX, same surrounding noise level, same
average ground properties, same OP ;-) )?.
I expect, that the groundwave does not immediately stop beyond this 2000km
border but rather decreases with 1/r, just as before.
So, if we assume one is increasing the antenna current in the above example to
7A, is then a distance of 14000km possible? Sure, thats a very theoretical
question since there will not be the same ground conductivity on the whole
distance but anyway.
And it is said that the groundwave is (nearly) not affected by the daytime, by
the season and so on. There must be interferences with the sky wave, so QSB,
but this does not affect the groundwave at an other RX QTH, where no sky wave
is present!?
If there is so much sea water between a transatlantic distance, why is it so
difficult to do it with the groundwave? On HF or MF it is clear but on LF?
Tnx for enlightning answers...
Stefan/DK7FC
________________________________
Von: [email protected] im Auftrag von ALAN MELIA
Gesendet: Fr 29.01.2010 01:51
An: [email protected]
Betreff: Re: LF: Ok its a sea path .. but this is getting silly
Ah this 500k stuff is too easy Graham :-)) oh for 73kHz again !
Alan G3NYK
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