Message-ID: <4CC70CBD.2040700@iup.uni-heidelberg.de>
Date: Tue, 26 Oct 2010 19:15:41 +0200
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <schaefer@iup.uni-heidelberg.de>
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In-Reply-To: <4CC6BE1D.4010503@iup.uni-heidelberg.de>
Subject: Re: LF: Alpha stations
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It seems the Alpha TX at 11904 Hz is/are not completely OFF but rather=20
about 25 dB weaker in the moment! I still receive a signal, 20 dB above=20
noise in 176 =B5Hz here...

73, Stefan

Am 26.10.2010 13:40, schrieb Stefan Sch=E4fer:
> Hello Con,
>
> Thank you!
>
> The Alphas are currently off.
>
> You can check it on my VLF grabber if you want, it is running 24/7:=20
> http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html
>
> There is a grabber window (RSDN-20_F1) which shows the Alpha trace at=20
> 11904.7619 Hz. You can see it is OFF since 2 days. The lower window=20
> (wideband) shows the VLF spectrum, as received here in Heidelberg.=20
> There, you can see all 3 Alpha traces, if they are ON, at about 15 dB=20
> S/N, depending on daytime but always visible...
>
> Good luck in experimenting down there :-)
>
> 73, Stefan/DK7FC
>
>
>
> Am 26.10.2010 11:29, schrieb ZL2AFP:
>>  Hello folks,
>>
>> I am new to the group and have been following with great interest the=
=20
>> VLF experiments. Congratulations to Stefan on such great DX=20
>> (1000+km). This is really good stuff.
>>
>> I have noticed in recent days that the Alpha stations at 11.9 and=20
>> 14.8kHz seem to have stopped transmitting. I can normally hear seven=20
>> stations but they have all disappeared. So I am wondering if=20
>> propagation has taken a dive, or perhaps the stations have gone QRT?
>>
>> Has anyone over there heard the Alpha stations recently?
>>
>> 73
>> Con ZL2AFP