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,
Sent: Friday, May 06, 2016 2:24 AM
Subject: Re: VLF: EbNaut transmissions on lower frequencies?,
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
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.