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Re: VLF: QRSS-240 at 5170 Hz

To: [email protected]
Subject: Re: VLF: QRSS-240 at 5170 Hz
From: Roman <[email protected]>
Date: Sun, 04 Aug 2019 15:59:29 +0300
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Congrats, Genosse Stefan!
VY readable!


> Here are results from the post-processing of yesterdays transmission at
> 5.17 kHz. RX sites at DK7FC (tree) in 57.6 km distance and DL0AO in 283
> km distance. Mixing the two orthogonal loops at DL0AO allowed to steer
> the resulting software rotatable loop into and angle where the SNR
> became as good as it can be for that day and time. Now the message is
> completely readable in 283 km distance (4.8 wavelengths). Two versions
> of the result at DL0AO are shown, one from DK7FC.
> TX site: 1130m spaced ground electrodes in JN39WI | 1.7 A antenna
> current at 370 W TX power (higher losses due to dry soil, thus less
> power from the given antenna voltage at the PA)
> 73, Stefan
> Am 03.08.2019 18:08, schrieb DK7FC:
>> BTW today i transmitted "73" in QRSS-240 at 5.17 kHz, starting 08:30
>> UTC. There was a team from a TV channel (Bayerischer Rundfunk) at the
>> VLF RX site of DL0AO and they followed the QRSS coming in on the
>> spectrogram. I hope they will report about it then...
>> Unfortunately it took 1.5 hours to fix two broken wires of the
>> antenna. Afterwards the QRN already set in, so half the message was
>> lost in the noise... Anyway, the 7 is quite doubtless.
>> 73, Stefan
-- 73!
Roman, RW3ADB

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