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Re: LF: Re: U.S. VLF License WH2XBA

To: <[email protected]>
Subject: Re: LF: Re: U.S. VLF License WH2XBA
From: <[email protected]>
Date: Sun, 2 Mar 2014 07:14:16 -0500
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Paul

Note that Bob's transmission did not resume until well after the 2330Z suggested time. I didn't have the grabber running at the time but would estimate that it was ~0015Z. His end time last night was 0720Z within a minute or two. Hope this helps.

Jay


----- Original Message ----- From: "Paul Nicholson" <[email protected]>
To: <[email protected]>
Sent: Sunday, March 02, 2014 1:09 AM
Subject: Re: LF: Re: U.S. VLF License WH2XBA



> Here's what he's sending ... http://www.w1vd.com/grabber.html

Thanks Jay.

Later I will make a spectrogram (the signal is recorded) but I
don't think I will be able to resolve the Morse.

I am happy that the tx preserves carrier phase in between dots
otherwise it would not be possible to do long integration.

The carrier stability is excellent and the little apparent
error in the frequency can be blamed on the path length varying
during the night.   tx must be using rubidium or GPS.

Signal level should drop soon as dawn arrives here in UK and
we may see the phase lead increase as the path shortens
for the daytime ionosphere.

 2014-03-02_05:15:00  0.14 fT   12.3 deg
 2014-03-02_05:30:00  0.15 fT   13.1 deg
 2014-03-02_05:45:00  0.12 fT    3.2 deg

--
Paul Nicholson
--




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