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- Subject: Re: 1500 KHz "Mystery Station"
- From: Glenn Hauser <wghauser@xxxxxxxxx>
- Date: Mon, 8 Feb 2016 18:13:30 +0000 (UTC)
- Delivered-to: irca@xxxxxxxxxxxxxxxx
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I agree there could be a considerable margin of error when taking bearings, and the need for more and more readings from a wide variety of locations.
I would add the need for daytime observations at groundwave range.
You mean 90 degrees here, not 180! ---
``Then do some quick calculations to determine the bearings to the station which will be 180 degrees from the deepest null point. So if the deepest nulls runs due North and South from your location, the desired station will be on a due East/West line.``
73, Glenn Hauser
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On Mon, 2/8/16, Les Rayburn <les@xxxxxxxxxxxxxxxx> wrote:
My understanding is that the best way
to obtain a bearing to a station is the procedure that Fred
outlined below.
Using a bi-directional loop, rotate the portable radio or
loop antenna until you achieve the deepest null on the
desired station (or mystery signal in our case). Make a note
of this bearing.
Then do some quick calculations to determine the bearings to
the station which will be 180 degrees from the deepest null
point. So if the deepest nulls runs due North and South from
your location, the desired station will be on a due
East/West line.
I fully expect some outliers with these bearings. Lots of
things can account for this. Local noise, terrain, and
overly broad patterns in loop antennas. But if we get enough
people to report their bearings, weâll be able to quickly
see which bearings are outliers and discard them from the
data.
Iâm going to drive to a nearby field that is flat, open,
and free from local noise sources to try again tonight. I
want to be sure that local factors are not affecting my own
bearing reports. Fortunately, there is a nearby sod farm
that is perfect for that.
What we need are more people to report on this. If youâre
located in the Eastern US or Canada, or the Midwest, your
reports are needed. Please take a few moments tonight to go
outside with a portable radio and try to obtain a bearing.
We could especially use DXâers in Florida or the Gulf
Coast.
Tim has been kind enough to post a YouTube video to
give you an idea of what this mysterious signal sounds
like:
https://www.youtube.com/watch?v=_M4opnMHq88&spfreload=1
We generally believe that itâs being caused by a
transmitter malfunction, or problem in the audio chain at
the station resulting in the signal being over-modulated.
Your help in solving the mystery is greatly appreciated.
Darn those meddling kids!
73,
Les Rayburn, N1LF
121 Mayfair Park
Maylene, AL
EM63nf
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