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| To: | "[email protected]" <[email protected]> |
|---|---|
| Subject: | AW: VLF: Uwe on the air! |
| From: | "[email protected]" <[email protected]> |
| Date: | Thu, 2 Feb 2017 12:55:52 +0100 (MET) |
| Importance: | normal |
| In-reply-to: | <[email protected]> |
| References: | <[email protected]> <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
|
Stefan, Paul, Markus,
yes,Stefan, the reason for malfunction was a too weak driver output signal. Now the antenna current could be up to 800mA. but the induction into fences etc does allow max 500mA to avoid neighbors yell when toutching his railings.
today I will try to finish the new rx 10m-circumference-loop. so the TX will be switched off. Any EbNaut transmission later.
Uwe/dj8wx
-----Original-Nachricht----- Betreff: Re: VLF: Uwe on the air! Datum: 2017-02-02T12:39:19+0100 Von: "Markus Vester" <[email protected]> An: "[email protected]" <[email protected]>
There's also a peak and a trace on 8269.995 Hz in the bottom window of my VLF grabber (~ 10 dB SNR in 63 uHz). Uwe, I'm glad to see your signal again! Unfortunately my receiver seems to be many dB worse that Stefan's...
Hi Uwe, VLF,Best 73, Markus (DF6NM) -----Ursprüngliche Mitteilung----- Von: DK7FC <[email protected]> An: rsgb_lf_group <[email protected]> Verschickt: Do, 2. Feb 2017 11:19 Betreff: VLF: Uwe on the air! Your signal is very strong today, currently 15 dB SNR in 424 uHz! http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html I bet you are trying to run more antenna current to leave a trace at RN3AUS in the next session!? :-) It would be interesting to see another EbNaut message from you. Maybe Markus can decode it as well. Or you can try to use a message longer than 5 characters, which is the longest message between us so far. Use Paul's calculator. With the information 15 dB in 424 uHz you can fill the upper two fields on the page and then vary the message length and symbol length. For example: http://abelian.org/ebnaut/calc.php?sndb=15&snbws=0.000424&snmps=&code=8K19&sp=30&crc=16&nc=12&submit=Calculate Theoretically this should give a decode even if the SNR falls by 6 dB. With 12 characters you could send your callsign and the locator! Meanwhile i'm transmitting since 35 hours a stable carrier on 2970.000000 Hz :-) 73, Stefan |
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