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Date: Sun, 23 Jan 2011 14:41:42 +0100
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Subject: Re: LF: Transmissions on 8970Hz
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Ossi, Gerhard, VLF,

Ossis signal is very remarkable, even without the balloon it's up to 20=20
dB above noise in 424 uHz. So if its 10 dB stronger with the balloon,=20
copy of QRSS/DFCW-600 would be no problem, at least arround 8...16 UTC.

Gerhards signal is well visible at 8970.00 too, the 35 mHz frequency=20
shift appears on my 424 uHz / DFCW-6000 window in the moment.

I am still comparing two different antenna locations: The "old" one that=
=20
runs the VLF grabber at=20
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html
and the new antenna (separated active antenna, using 30m TP cable, 20m=20
higher distance to the tram line (QRM source)), running a 2nd "6000"=20
window at=20
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html
An overview over the last days Austrian VLF transmissions seems to show=20
a slightly better SNR so i change the replace the old antenna by the new=
=20
one for all VLF windows. Tnx to OE5ODL and OE3GHB for generating signals=
=20
that allow comparing both antennas under practical situations.

Good luck!

73, Stefan/DK7FC

Am 23.01.2011 13:53, schrieb Gerhard Hickl:
> Hello again!
>
> At about 12:30UT I disconnected the lightning protector again.
>
> At 500mA Antenna current the wires from the roof are at about 200V and
> the current to earth was measured at 60mA.
>
> I did this connecting/disconnecting-test now several times but the
> signal received by Lubos in 40km distance didn't show any noticeable
> difference. That's a riddle to me.
>
> The only difference I notice locally, is that the field-strength in my
> shack (directly under the roof) is much higher when the protector is
> disconnected because the shielding effect of all the metal parts on the
> roof isn't given any more. This also can be seen on my grabber.
>
> 73
> Gerhard
>
>
>
>
>
>
>
>
>
> Am Sonntag, den 23.01.2011, 13:01 +0100 schrieb Gerhard Hickl:
>   =20
>> Hello Lubos and group!
>>
>> Yes, I started at about 11UT.
>>
>> Yesterday at 12:45UT I reconnected the lightning protector of the house
>> to ground but I couldn't see any difference on the plot you sent.
>>
>> So I guess if connected or not doesn't play a big role. On the other
>> hand, there's a high voltage on the wire coming down the roof which mus=
t
>> lead to some current flowing to ground.
>>
>> Maybe I will disconnect again in the afternoon and measure Voltage and
>> Current.
>>
>> Today we have strong wind here and I will see how long I can keep the=
 TX
>> running.
>>
>> 73, tnx
>> OE3GHB
>> Gerhard
>>
>>
>>
>>
>> Am Sonntag, den 23.01.2011, 12:40 +0100 schrieb Lubos OK2BVG:
>>     =20
>>> Hello Gerhard, VLF!
>>> I noticed, that you had started transmissin at 11:00UT ( S/N =3D 15dB)=
.
>>>   I saw Ossi=C2=B4s transmission from 09:30 to 11:00UT, but very weakl=
y, as
>>> usual
>>>
>>>
>>> Lubos, oK2BVG
>>>
>>>
>>> ***************************
>>>
>>>       =20
>>>> From: gerhard.hickl@aon.at
>>>> To: rsgb_lf_group@blacksheep.org
>>>> Date: Sun, 23 Jan 2011 10:07:28 +0100
>>>> Subject: Re: LF: Transmissions on 8970Hz
>>>>
>>>> Hello Daniele, group!
>>>>
>>>> I will fire up later slightly below 8970.
>>>>
>>>> Ossi is already transmitting.
>>>>
>>>> 73
>>>> OE3GHB
>>>> Gerhard
>>>>
>>>>
>>>>
>>>> Am Sonntag, den 23.01.2011, 00:54 -0800 schrieb Daniele Tincani:
>>>>         =20
>>>>> Hello VLF,
>>>>> any transmission tests planned today?
>>>>> Regards
>>>>> D.
>>>>>
>>>>>
>>>>>           =20
>>>>
>>>>
>>>>         =20
>>>       =20
>>
>>
>>     =20
>
>   =20