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Fwd: VLF: Weekend carrier on 8270.005 Hz...

To: [email protected]
Subject: Fwd: VLF: Weekend carrier on 8270.005 Hz...
From: Markus Vester <[email protected]>
Date: Sun, 12 Feb 2017 17:17:39 -0500
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Pulled the plug at 21 UT. My carrier was on air for 10:44 hours this Sunday, with only a couple of short interruptions. For some reason the antenna current was slightly behind yesterday's (0.34 instead of 0.37 A). Again our joined three-fold activity was well rewarded by good traces in Todmorden and in Cumiana, though I guess I'm still lacking a few dB's to reach one of Eddies spectrograms.

BTW This morning I attempted to measure the effective height of my antenna at VLF, by comparing receive signal levels from HWU, DHO and DCF to a small nonresonant loop. The result was 8 (+-1) meters, similar to what I had found earlier for 137 kHz. Radiation resistance at 8.27 kHz is thus ~ 77 microohms.

Best 73,
Markus (DF6NM)


-----Ursprüngliche Mitteilung-----
Von: Markus Vester <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: So, 12. Feb 2017 11:39
Betreff: Re: VLF: Weekend carrier on 8270.005 Hz...

Thanks Paul! I'm almost surprised that my weak signal came out so well, the difference to Stefan's ERP should be larger than 10 dB. Cumiana also showed two nice peaks at 20 UT.  

The carrier is back on 8270.0025 since 10:16 UT.

Best 73,
Markus

-----Ursprüngliche Mitteilung-----
Von: Paul Nicholson <[email protected]>
An: rsgb_lf_group <rsgb[email protected]>
Verschickt: Sa, 11. Feb 2017 22:51
Betreff: Re: VLF: Weekend carrier on 8270.005 Hz...


> Three traces are now visible in the Todmorden spectrogram.

This is the best that I can do

http://abelian.org/vlf/tmp/170211b.png

Something wrong with Uwe's signal, off-frequency and wandering.
It would be similar strength to DK7FC if it was all in one bin.
--
Paul Nicholson
--


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