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| Subject: | Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz |
| From: | DK7FC <[email protected]> |
| Date: | Sat, 14 May 2016 14:37:23 +0200 |
| In-reply-to: | <[email protected]> |
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Hi Paul,Hmm, that's a pity. Maybe it would be useful to run a beacon, periodically the same message in shorter symbols, maybe 40s. A single character would be already fine, like 'R'. This would take 3:33:20 to be sent. I could do this each 4 hours. Or i can send a simple carrier for a few days. However i want to build a circuit which keeps the antenna current constant, even during rain, so the ERP stays constant! 73, Stefan Am 14.05.2016 12:59, schrieb Paul Nicholson: Stefan wrote: > f = 6470.00000 Hz > Start time: 13.05.2016 00:00:02 UTC > Symbol length: 100 s > Characters: 6 I haven't been able to decode this one. The average noise was 3.7 dB higher than the previous successful message, so there should still be a couple of dB to spare. I've tried a wider range of phase search in case the day/night phase change was more than expected. So far it seems that 6.47 is more variable and unpredictable than 8.27 which is opposite to what I'd expect. -- Paul Nicholson -- |
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