Greetings everyone.
Some of you may have heard of the "mystery signal"
that shows up on 7237 KC intermittantly,
seemingly around Sedona, AZ.

I looked at the spectrum of the clip and
found that all the intelligence is concentrated
above 1.5 kilohertz.
Most of the "good stuff" is located at
2 kiloHertz and higher.

I filtered out the stuff below
1.5 kiloHertz and enhanced the information
above on a sliding, linear scale going up
to 400% enhancement at 20 kiloHertz,
trying to "pull out" any scraps
that might be left.
I clipped out the carrier at 10 kHz
and did a noise reduction.

I passed the clip through a
product detector and produced two clips
with slightly different processing.
The two clips are available at the address below.
I found the intelligence to be
approximately 5-7 kiloHertz above
the detector LO.
While there are carriers evident at 1150
Hertz and also at about 10 kiloHertz,
they do not appear to be necessarily
connected to the "voice."
It is definitely speech,
though there is not enough of the
scraps of the intelligence left to make it
readily understandable. Cadence sounds
very much like a talk radio announcer,
but may be a ham.
Also might be in spanish, which I deduce
from what may be a couple of rolled "r"s.

I believe it's going to be an intermittant
parasitic from a spanish broadcasting station.
It can happen during the loudest
fraction of each word spoken,
which would help explain
the clipped intelligence. Many things can
cause this- even an air conditioner switching
on and off can create an electrical situation
where a parasitic can escape. That could
explain the "click" and the intermittent
nature of the signal.

If you speak spanish (I don't), please
listen to these two clips and see if
you can make anything out:
http://tinyurl.com/5g27e

If any ham in the area has a
wide band receiver (one without a single-sideband
or other narrow filter) that can record this
sound straight to their sound card with at least
20 KC of bandwidth, giving us intelligence to work with-
we might get an "ID" on this one.

Kind Regards,
David Stinson