From: Roman <rw3adb@YANDEX.ru>
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <5B8D87FA.3020603@posteo.de>
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Date: Tue, 04 Sep 2018 00:37:28 +0300
Message-Id: <258741536010648@sas1-0a6c2e2b59d7.qloud-c.yandex.net>
Subject: Re: ULF: Carrier on 2970.005 Hz
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GA Genosse Funkamateur Stefan! 

Vielen dank!
MNY TNX for info!

Tell me pse, whats QRB on your DFCW-90 experiment and on 2970|1970 Hz?

Best DX in your experiments!
All russian LF looking to your experiments! -)

73!
Roman


> Hello Genosse Roman,
> 
> Yes, i used the ground loop also on 2970 Hz (and on 2470 Hz and 1970
> Hz). On sunday i also run a 2 hour long carrier on 1570 Hz starting
> 08:08 UTC. The post-processing is running. I will report later. Next i
> will try 970 Hz but also 137 kHz!
> 
> 73, GL, Stefan
> 
> Am 03.09.2018 20:45, schrieb Roman:
> 
>> Congrats Stefan!
>>
>> Impressed by your DFCW TX a\t 8 kHz.
>> Do you use a ground ant at 2970 also too?
>>
>> 73
>> Roman
>>
>>> Here is a spectrogram showing the 2970 Hz signal in 3.8 mHz as received
>>> on the tree. The carrier reached an S/N of 27.57 dB in 166.7 uHz, -10.22
>>> dB in 1Hz, -44.20 dB in 2.5kHz
>>>
>>> 73, Stefan
>>>
>>> Am 01.09.2018 21:33, schrieb DK7FC:
>>>
>>>> Hi Markus and Paul,
>>>>
>>>> Thanks for the efforts to watch out for the signal. I'm surprised that
>>>> the signal appears at Bielefeld since the 900m ground loop antenna in
>>>> JN39WI does not really point there, it rather points directly to Paul.
>>>> No trace in Todmorden? The gain of the loop is on your side! :-)
>>>>
>>>> Markus, can you decode a '*' message from the exportet FFT data? 8 dB
>>>> in 167 uHz could be fine.
>>>>
>>>> It was an interesting test of the new equipment. After the 100 minutes
>>>> at 265 W power consumption from the battery, the display still shows
>>>> 70 % rest capacity for the next experiment which will follow soon. The
>>>> H bridge PA stays cool during the transmission. The PA can work from
>>>> 30 Hz to 9 kHz. I could add another 3 dB by running more power. Since
>>>> i have to 'wait' during the transmission i can't run a 24 hour
>>>> transmission :-) It will always be less than 2 hours but i can run
>>>> more power so we can search for the signal in a higher bandwidth which
>>>> could be an advantage.
>>>>
>>>> 73, Stefan
>>>>
>>>> Am 01.09.2018 20:33, schrieb Paul Nicholson:
>>>>
>>>>> After cycling through some combinations of filter and
>>>>> blanker settings, Bielefeld (DL4YHF) is now showing
>>>>>
>>>>> http://abelian.org/vlf/tmp/180901b.gif
>>>>>
>>>>> About 3.8 sigma, needs another couple of dB.
>>>>>
>>>>> --
>>>>> Paul Nicholson
>>>>> --
-- 
73!
Roman, RW3ADB