Message-ID: <000901cc1bb3$78e76bb0$0401a8c0@xphd97xgq27nyf>
From: "mal hamilton" <g3kevmal@talktalk.net>
To: <rsgb_lf_group@blacksheep.org>
References: <4DDE4CB5.4040803@iup.uni-heidelberg.de>
Date: Thu, 26 May 2011 15:44:51 +0100
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Subject: LF: Re: 137 kHz groundwave
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Stefan
Maybe the grabber lacks sensitivity and needs a Tweak. I can copy your=
 CW
but you cannot copy me??? although I can QSO two way with Russian stat=
ions
around Moscow.
Because we cannot see our signals on a Grabber is does not mean there=
 is no
Propagation. I am suspicious of some Grabbers because of lack of sensi=
tivity
or environmental noise. Do not rely on Grabbers, I find the best way=
 is to
have a QSO with someone that has a good ear and a good RX setup and al=
so
transmitts a signal that others have a good chance of hearing.


Mal/g3kev

----- Original Message -----
From: "Stefan Sch=E4fer" <schaefer@iup.uni-heidelberg.de>
To: <rsgb_lf_group@blacksheep.org>
Sent: Thursday, May 26, 2011 1:51 PM
Subject: LF: 137 kHz groundwave


> LF,
>
> I just sent some CQ calls on 137.71 kHz and saw the signal at about=
 the
> same strength on the G4WGT grabber in 910 km, O copy. But there is=
 no
> trace at all on the YO/4X1RF grabber in 1426 km (in QRSS-10). The 13=
7
> kHz groundwave seems to "stop" somewhere between these distances, ma=
ybe
> arround 1000km.
> I'm sure some of you have some better theoretical and/or practical
> experience about that?
> Another advantage of VLF,where it's "easy" to reach 2500 km and abov=
e
> anytime :-)
>
> 73, Stefan/DK7FC
>