[Lowfer] An interesting signal on 1610 KHz A.M. last night

[K2ORS]

Andy,

  Great story, its the mysteries like this that keeps one interested in 
radio!

73 K2ORS

PS Let us know if you do find the source of the 1610 cw -
----- Original Message ----- 
From: "Andy - KU4XR" <ku4xr at yahoo.com>
To: <lowfer at mailman.qth.net>
Sent: Thursday, October 27, 2011 6:19 PM
Subject: [Lowfer] An interesting signal on 1610 KHz A.M. last night


Greetings all: Coming home after mid-week church service last night ( 
10/26/2011 ), my wife wanted to
stop at the grocery store to get some ice cream, and caramel topping... 
While she and my son were in the
store, I turned on the radio in the Chevy Blazer, and set it to 1610 KHz... 
I got to listen for about 15 min.
The factory radio isn't anything to brag about for reception, but I was 
hearing the usual spanish station,
along with a second spanish station ocassionally, and I even heard an 
english station 1 time for about
30 seconds or so... But, that wasn't the interesting signal... rising up, 
and fading out, I was hearing a very
raspy, and chirpy CW signal... It never stayed copyable long enough to get 
any really useful ID info on it.
I did manage to hear the letters J J many times, but there was more than 
that in the transmission...
I ruled out mixing products when I was able to hear it on the Kenwood at 
home too. Of course on the
160 Windom, and the much more sensitive receiver; it was harder to detect it 
than on the car radio...
I finally found that the signal was 1700 Hz above 1610 KHz, so I engaged the 
DSP filter with a 200 Hz BW
from 1600 - 1800 Hz, and switched to USB... Now; I could actually tell that 
there was a CW signal in there.
Unfortunately, by the time I had all this figured out; the band changed, and 
the signal went away, and did not
come back over the space of about an hour... The speed was about 15 wpm, and 
I did clearly hear the J J
in USB at 200 Hz Audio BW... A nice little trick to heterodyne ( piggy 
back ) a weak signal on a strong one.
I mainly heard the signal when the spanish stations would rise up, and it 
was better during talking, or a
dead space in programming... Curiousity of course will have me listening on 
the way home from work tonite
on my Pioneer radio which is a much better A.M. receiver than the GM radio 
is... May hear something; and
then again, may not...

73: Andy - KU4XR
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