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| To: | [email protected] |
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| Subject: | Re: ULF: Carrier on 2970.005 Hz |
| From: | DK7FC <[email protected]> |
| Date: | Sat, 01 Sep 2018 21:33:27 +0200 |
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Hi Markus and Paul,Thanks for the efforts to watch out for the signal. I'm surprised that the signal appears at Bielefeld since the 900m ground loop antenna in JN39WI does not really point there, it rather points directly to Paul. No trace in Todmorden? The gain of the loop is on your side! :-) Markus, can you decode a '*' message from the exportet FFT data? 8 dB in 167 uHz could be fine. It was an interesting test of the new equipment. After the 100 minutes at 265 W power consumption from the battery, the display still shows 70 % rest capacity for the next experiment which will follow soon. The H bridge PA stays cool during the transmission. The PA can work from 30 Hz to 9 kHz. I could add another 3 dB by running more power. Since i have to 'wait' during the transmission i can't run a 24 hour transmission :-) It will always be less than 2 hours but i can run more power so we can search for the signal in a higher bandwidth which could be an advantage. 73, Stefan Am 01.09.2018 20:33, schrieb Paul Nicholson: After cycling through some combinations of filter and blanker settings, Bielefeld (DL4YHF) is now showing http://abelian.org/vlf/tmp/180901b.gif About 3.8 sigma, needs another couple of dB. -- Paul Nicholson -- |
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