Message-ID: <4CE28C13.3080200@iup.uni-heidelberg.de>
Date: Tue, 16 Nov 2010 14:50:11 +0100
From: =?ISO-8859-15?Q?Stefan_Sch=E4fer?= <schaefer@iup.uni-heidelberg.de>
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To: rsgb_lf_group@blacksheep.org
CC: Paul <paul@abelian.netcom.co.uk>
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Subject: Re: VLF: Long time transmission on earth antenna
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Dear VLF,

I will do some _pre-tests_ today on the earth antenna (testing if GPS 
can be received in the forest and if the output transformer becomes warm 
in steady state when running 100 W RF key-down).

Before i will do a (new) short test on 1970 Hz. A loop antenna was built 
to receive on 1970 Hz. It has still no preamp but is directly fed into 
the soundcard, anyway... The antenna is now nulling out the strong QRM 
of the tram line near the institute and i hope for a better S/N.

After that about one hour or so on 8970.00500 Hz.

Starting time is in about 90 minutes.

If someone wants spontaneous to take part, you are invited. The 24 h 
transmission will then come hopefully in a few days, maybe 
wednesday/thursday...


73, Stefan/DK7FC

PS: Again note that this is a very weak signal test and cannot be 
compared with a kite antenna transmission. So do not wonder if the 
signal doesn't appear at 25 dB S/N in 4.5 mHz ;-)

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Dear VLF,<br>
<br>
I will do some <u>pre-tests</u> today on the earth antenna (testing if
GPS can be received in the forest and if the output transformer becomes
warm in steady state when running 100 W RF key-down). <br>
<br>
Before i will do a (new) short test on 1970 Hz. A loop antenna was
built to receive on 1970 Hz. It has still no preamp but is directly fed
into the soundcard, anyway... The antenna is now nulling out the strong
QRM of the tram line near the institute and i hope for a better S/N.<br>
<br>
After that about one hour or so on 8970.00500 Hz.<br>
<br>
Starting time is in about 90 minutes.<br>
<br>
If someone wants spontaneous to take part, you are invited. The 24 h
transmission will then come hopefully in a few days, maybe
wednesday/thursday...<br>
<br>
<br>
73, Stefan/DK7FC<br>
<br>
PS: Again note that this is a very weak signal test and cannot be
compared with a kite antenna transmission. So do not wonder if the
signal doesn't appear at 25 dB S/N in 4.5 mHz ;-)<br>
</body>
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