[Heathkit] 28.635 Sig rept using spectrum display

Tue Jan 4 11:25:55 EST 2005

I am hearing what may be the mystery signal here in Semi Valley, CA
although the tone shifts are much faster, every few seconds, at 1620 Z.
Has anyone tried to triangulate it ? I don't have a beam, just a G5RV.

73, Ed Richards K6UUZ

On Tue, 04 Jan 2005 00:41:49 -0500 "Gregory W. Moore"
<gwmoore at moorefelines.com> writes:
> GE er GM, All.
> 
> Hr flws sig rept 28.635Khz,
> 
> Time 0508Z (0008R) 4 JAN 2005
> 
> Sig recieved on Icom IC-746PRO, equipped with high stability crystal 
> 
> freq standard, fed from GAP Titan DX vertical.
> 
> Sig taken in USB position after verfifying zero beat in CW of 
> 28.635KHz.
> 
> Lvl approx S6-7.
> 
> I then applied sig to MixW program, expanded waterfall to X5 scale, 
> and 
> used CW mode to get a single cursor I could work with.  This signal 
> looks like, or very similar to, a carrier tonepack, or a telemetry 
> trace 
> of some sort.
> 
> The signal is composed of  14 discrete tones, all frequency 
> modulated to 
> some degree, but most constant.
> the frequencies are:
> 436.0 Hz
> 705.0 Hz
> 776.0 Hz
> 805.0 Hz
> 831.0 Hz
> 909.0 Hz
> 993.0 Hz
> 1187.0 Hz
> 1227.0 Hz
> 1274.0 Hz
> 1348.0 Hz
> 1772.0 Hz
> 1816.0 Hz
> 2000.0 Hz
> 
> The 1348 Hz signal was frequency modulated in a slow  digital 
> pattern 
> and also amplitude modulated in a slow digital pattern
> which did not correspond to Morse, Baudot, ASCII, or any other 
> pattern I 
> could pick off the top of my head.   The FM
> is 24 Hz shift, from 1361 Hz to 1336 Hz. I didn't take the time to 
> measure the amplitude excursions, I wanted to get this posted, 
> because 
> I',m getting kind of tired --hi--...
> 
> I made no attempt to make these numbers work out. I eyeballed the 
> center 
> freq of each waterfall trace, as well as the edges of the FM 
> modulation 
> of the 1348 Hz trace.  It was only after I looked at all the numbers 
> did 
> I realize that they all were exact freqs, I.E. no decimal 
> frequencies, 
> and I was extremely suprised to find the exact 25 Hz FM deviation on 
> the 
> 1348 Hz trace.
> 
> Given these results I have reasonably high confidence in my 
> findings, 
> and that they are correct.  I will continue to monitor this freq 
> tomorrow and see if I can't make some kind of sense out of this.  I 
> am 
> reasonably certain that I am seeing a carrier tonepack, or a 
> telemetry 
> tonepack.  When I first was looking at the traces, One of them (I 
> forget 
> which now) seemed to be FM modulated as a time reference, as the 
> deviation was all one direction (center downward) and at regular 
> squarewave like intervals.  This particular trace ceased the 
> behavior 
> when I got around to expanding the waterfall (naturally) but I am 
> determined to track this thing down and get a handle on it.  It 
> doesn't 
> sound like any 16 channel tonepack with which I am familiar, nor any 
> 
> telemetry with which I am familiar, (Yup, I've heard ans 'scoped  a 
> lot 
> of them, most of which I still can't talk about),  but heck, this is 
> the 
> 21st century--hi--
> 
> Thanks to this group for a wonderful mystery!!  Sometimes you have 
> to 
> get off the MARS nets, or chasing CW DX all nite, and solve these 
> things 
> (if they can be solved). Since I am retired disabled, I have all the 
> 
> time in the world to pick around at this enigma.
> 
> Hr fols my QRZ.com info for those plotting the sig repts:
> QSL Mgr: 	Buro
> Coordinates: 	39.956267     -75.274357
> County: 	Delaware
> Grid: 	FM29iw
> Area Code: 	610
> GMT Offset: 	-5
> Time Zone: 	Eastern
> Has DST?: 	Y
> Birthday: 	02 Jun 1947
> QRZ Updated: 	2003-06-27 12:52:12
> 
> 
> 73 de Greg "GW" Moore WA3IVX/ NNN0BVN
> 
> -- 
> 
> Happily turning electricity into RF energy for almost 40 years,
> on land, sea and air, professional and amateur,
> around the clock and around the world. KEEP CW ALIVE! 
> Become an Elmer today!!!
> 
> "All that is necessary for the triumph of evil is that good men do 
> nothing."
>                                                    --Edmund Burke
> Greg Moore NNN0BVN PA
> U.S. Navy-Marine Corps Military Affiliate Radio System (MARS)
> Official Pennsylvania Area Website:
> http://pages.prodigy.net/nnn0fbk/mars.htm
> Official Northeast Area Website:
> http://www.navymars.org/northeast/index.htm
> Navy-Marine Corps MARS: Proudly Serving Those Who Serve."
> E-Mail (MARS) nnn0bvn at navymars.org
> E-Mail (ARRL) wa3ivx at arrl.net
>
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