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No chance to see anything on 6470 Hz here due
to heavy railway QRM. I noticed that the unstable lines seem to
be concentrated on odd multiples of 16.70 Hz. Going 8 to 10 Hz up
(e.g. to 6480 Hz) would place the signal in a QRM minimum,
gaining at least 5 dB on average.
All the best,
Markus (DF6NM)
Sent: Friday, May 06, 2016 2:24 AM
Subject: Re: VLF: EbNaut transmissions on lower frequencies?,
pre-tests: 6.47kHz
Stefan,
Your 200mA carrier comes through well here at
6.47 kHz, nice
signal at 0.14 fT during the night. Daytime is 0.04 fT
or
below and might be a bit of a struggle.
I don't need any more
carrier. From the raw recording I can
optimise filters and blankers and
look at most of the diurnal.
--
Paul
Nicholson
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