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Hi Laurence, Jim,
the Alaska screenshot looks pretty similar to what
came in here on 20.5 kHz today:
The cursor for the spectrum plot was moved to
the twin peaks around 10:39. Please ignore the complex, digitally looking patterns from 10:20
to 12:00 UT - it's not the railway but the microcontroller in my
neighbour's dishwasher!
Best 73,
Markus (DF6NM)
Sent: Wednesday, December 25, 2013 4:53 PM
Subject: RE: LF: VLF
RJH6X 20.5 Heres a snapshot/cut paste as seen here at around
11z from here in Alaska http://kl7l.com/RJH6X.jpg
From: [email protected]To: [email protected]Date:
Wed, 25 Dec 2013 13:52:23 +0100 Subject: Re: LF: VLF
Hi Jim, what
frequency is that, 20.5 kHz? Did you happen to take a screenshot? 73, Markus
Sent: Wednesday, December 25, 2013 1:19 PM
Subject: LF: VLF
While working on VLF receiver noise this morning (~1100
UT) in Arizona a 35dB S/N signal ~ 50Hz wide (somewhat rectangular) appeared on
the RJH6x marker for a few minutes, then disappeared. It didn’t appear to be
local noise; could it have been RJH6x? It was 20dB over NPM, which makes me
think that it couldn’t have been too distant.
73, Jim AA5BW |
