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 stations
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 sensitivity
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 also
transmitts a signal that others have a good chance of hearing.
Mal/g3kev
----- Original Message -----
From: "Stefan Schäfer" <[email protected]>
To: <[email protected]>
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 137
> kHz groundwave seems to "stop" somewhere between these distances, maybe
> 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 above
> anytime :-)
>
> 73, Stefan/DK7FC
>
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