Message-ID: <5B904C48.9000302@posteo.de>
Date: Wed, 05 Sep 2018 23:36:08 +0200
From: DK7FC <selberdenken@posteo.de>
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References: <5B8FD14A.2080403@posteo.de> <14564361536176528@iva5-e9a4c5420a84.qloud-c.yandex.net>
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Subject: Re: ULF: First far field detection at 1570 Hz
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Hello Roman,

Yes maybe i'll build a quick PA tomorrow for LF and will transmit on LF 
for 24 hours, each 10 minutes, WSPR-2. I have no idea at all how this 
antenna performs on 137 kHz. Is it still a loop or rather a dipole or a 
mixture? At least it has about the length of a full size dipole for 137 
kHz. I would TX at 10 W RF power only, so that a small accu covers some 
hours. But i'm not yet sure if i can find the time to do it tomorrow.

73, Stefan

PS: If the antenna acts as a dipole, then it is beaming to Russia directly.

Am 05.09.2018 21:42, schrieb Roman:
> Congrts, Stefan!
>
> We are follow by your success!
> Listen, do you planning to operate 136 kHz, I hear, tell me pse - do you planing try to TX with that ant on 477 kHz and 160M?
> I will be interestin to hear about results.
>
> 73!
> Roman
>
>
>    
>> ULF,
>>
>> Last sunday i finally managed to detect a carrier transmission on the
>> 191 km band in the far field. In fact the distance is higher than 1/4
>> wavelength. A new lowest frequency of a signal generated by amateurs,
>> detected in the far field.
>>
>> At 250 W RF power i transmitted for 2 hours (starting 08:08 UTC) on my
>> 900m long ground loop antenna. It seems to be a very hard band with poor
>> propagation. Furthermore my RX antenna becomes deaf below 2 kHz. So the
>> S/N is much lower as expected when comparing to the results at 1970 Hz.
>> Two spectrograms are arrached, showing the short trace in 424 uHz and
>> 212 uHz.
>>
>> Before finally entering the far field in the frequency range below 1 kHz
>> it may be necessary to build up an E field RX at the RX QTH. I first
>> step for that was done yesterday.
>>
>> To be continued...
>>
>> 73, Stefan
>>