Date: Tue, 23 Mar 2010 09:12:19 +0100
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
From: Rik Strobbe <rik.strobbe@fys.kuleuven.be>
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Subject: Re: AW: LF: Re: DK7FC's 3rd VLF transmission
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>BTW: We could philosophize what is the definition for "DX" on LF and 
>VLF! Or is there a standard definition? In my ham licence i learned 
>that on HF, DX is outside the own continent and on VHF it is above 
>300km. So, what is it for LF? And what for VLF (by hams)?

Stefan,

a philosophical approach to define DX : distances that are a challenge.
What would mean that what is considered DX can differ from band to 
band and on the same band even  from one station to another: running 
1W ERP on 137kHz DX could be 5000km or more , running 1mW ERP it 
could be 500km or more.
I have always had a bit of a problem with the "outside the own 
continent" definition. For a ZB2 station it would mean that CN (can 
be as close as 10km) would be DX while UA (at up to 4000km) would not be DX.

73, Rik  ON7YD - OR7T

PS: as it returned from a family visit last Sunday I saw your 
announcement and just hooked up the 500kHz antenna (11m high and 25m 
long lazy L) to the sound card. I could see something going on at 
8970, but too weak (and too much QRM/QRN) to decode. It time permits 
I will try to bring the antenna to resonance at 9kHz for you next test. 

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<blockquote type=cite class=cite cite=""><font size=2>BTW: We could
philosophize what is the definition for &quot;DX&quot; on LF and VLF! Or
is there a standard definition? In my ham licence i learned that on HF,
DX is outside the own continent and on VHF it is above 300km. So, what is
it for LF? And what for VLF (by hams)? </blockquote><br>
Stefan,<br><br>
a philosophical approach to define DX : distances that are a
challenge.<br>
What would mean that what is considered DX can differ from band to band
and on the same band even&nbsp; from one station to another: running 1W
ERP on 137kHz DX could be 5000km or more , running 1mW ERP it could be
500km or more.<br>
I have always had a bit of a problem with the &quot;outside the own
continent&quot; definition. For a ZB2 station it would mean that CN (can
be as close as 10km) would be DX while UA (at up to 4000km) would not be
DX.<br><br>
73, Rik&nbsp; ON7YD - OR7T<br><br>
PS: as it returned from a family visit last Sunday I saw your
announcement and just hooked up the 500kHz antenna (11m high and 25m long
lazy L) to the sound card. I could see something going on at 8970, but
too weak (and too much QRM/QRN) to decode. It time permits I will try to
bring the antenna to resonance at 9kHz for you next test.</font></body>
</html>

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