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...very interesting thread!
Peter's plots for Feb 3rd give daytime levels of
+23 dB for 26 kHz and +17.2 dB for 26.7. His distance to Bafa is 2288 km.
Assuming 1/r propagation (certainly only a very rough guess), and a TX location
in Northern Israel, 26 kHz should have about 8.5 dB more EMRP than
Bafa.
Chris' 10 UT spectrogram has 26 kHz at -110 dB and
26.7 at -81 dB. Haifa is 863 km from Bafa, which would then place the unid site
81 km from him.
A similar estimate using Paul's earlier figure of
15 dB difference would result in 17 dB ERP difference, and about 220 km from
Haifa.
The North of Israel is a narrow and densely
populated country, so it may be difficult to erect a large VLF installation.
There is however a large coal plant on the seashore near Hadera at
32.469 N
34.886 E (39 km south of Haifa),
which has three very prominent chimneys on a
baseline length of 460 m. This is just speculation, but it might be feasible to
run a wire antenna between the tops of the chimneys, and do without a radial
system by directly connecting to seawater.
Chris, how about taking along loop and notebook for
your next scenic drive ;-)
Best regards,
Markus (DF6NM)
Sent: Saturday, February 05, 2011 9:21 AM
Subject: Re: VLF: New transmitter on 26 kHz in Israel
?
Hello Wolf, VLF,
I have only a small E-field probe antenna optimized for the 9kHz dreamer's
band so can't contribute any DF information than already available in the thread
you've mentioned. Now back to 48kc/s sample rate for tomorrow DK7FC VLF
experiment.
73s
Chris 4X1RF
On Fri, Feb 4, 2011 at 11:30 PM, wolf_dl4yhf <[email protected]>
wrote:
Greetings
all,
There seems to be a new transmitter being set up at the moment. It
only operates occasionally, but quite strong here when it's "on". Some
speculation in the VLF group about the exact location:
http://tech.groups.yahoo.com/group/VLF_Group/message/16955?l=1
Since
we have at least one keen VLF experimenter from that area in this group... if
you have a loop antenna, can we have a bearing towards that "unknown"
transmitter ?
Cheers,
Wolf DL4YHF
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