Re: LF: Daytime 29.499 kHz

[Paul Nicholson <vlf0403@abelian.org>]

I think the propagation at 29.5 has changed, even though NAA
looks normal at 24kHz.

There's a new pattern to the phase change: a fairly
rapid reduction of phase lead by about 120 deg during
the first 2 hours.   Minimum phase at about 03:00 instead
of 04:00 and after that a slow phase increase.

Last night:

 http://abelian.org/vlf/tmp/29499_140309a.gif

Previous night:

 http://abelian.org/vlf/tmp/29499_140308a.gif

Two nights in a row we got that 120 phase shift in
2 hours.   Other possibility is the loading coil tuning
is changing as it warms up from a cold start.

Signal last night from Dex on 29501 was also weaker than the
other day

 http://abelian.org/vlf/tmp/29501_140309a.gif

These opera transmissions might be a bit weaker than
the Morse anyway because the duty cycle is less ??

Signal on 29499 declined during the night, NAA increased a
little.
--
Paul Nicholson
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