To: | [email protected] |
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Subject: | Re: VLF: 300 mA on 6470 Hz - 1 char decoded at DF6NM |
From: | Markus Vester <[email protected]> |
Date: | Fri, 6 Oct 2017 06:00:14 -0400 |
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Despite truncated data from a 31 uHz instance and severe railroad QRM, I happened to get a correct constant-phase decode from my home antenna. Best 73, Markus -----Ursprüngliche Mitteilung----- Von: Markus Vester <[email protected]> An: rsgb_lf_group <[email protected]> Verschickt: Fr, 6. Okt 2017 11:00 Betreff: Re: VLF: 300 mA on 6470 Hz - 1 char not decoded at DL0AO Unfortunately the 1-character message was not decoded correctly from DL0AO data. The prior carrier had been well visible during the day, but completely drowned in nighttime QRN. Would you perhaps like to try another short EbNaut message in daylight? Best 73,
Markus -----Ursprüngliche Mitteilung----- Von: DK7FC <[email protected]> An: rsgb_lf_group <[email protected]> Verschickt: Mi, 4. Okt 2017 11:52 Betreff: Re: VLF: 300 mA on 6470 Hz
Hi Paul,
Am 04.10.2017 11:07, schrieb Paul Nicholson: You may as well use 8K19A or even 4K15A. OK, so i'm changing to: f = 6470.005000 Hz Start time: 04.October.2017 17:00:00 UTC Symbol period: 240 s Characters: 1 CRC bits: 0 Coding 8K19A Duration: 12h48min Antenna current: 300 mA For some reason, the signal last night was about 6dB weaker.Interesting. And for some reason, the signal was much stronger last night at SQ5BPF. Did you see it? What could be the reason? Just the noise blanker / background QRN? The message will give you/us and 3rd impression about SNR and phase. A 10 deg phase variation between last night and the night before seems already to be quite high, relative to what we observed at 8270. Maybe we will learn a bit about propagation by that. The 1 char message is for Jacek mainly. The chance for a decode will be high i think. Then i thought i try another (daily) 12 char message for Jacek before we can try the 100 char message. We've already done quite much on that 46 km band, so i wouldn't spend to much time there, 2 weeks maybe. Then QSY to 58 km where we can stretch the record list a bit by transferring 100 chars to you Paul. 73, Stefan
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