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Author Topic: 17 meter Noise..15 kc -wide  (Read 3370 times)
K3JVB
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« on: April 19, 2006, 09:28:54 AM »

Hi all
Anybody hear a strage noise on 17 meters? I was tuning the band about 12:30 eastern time. And it was almost like the wood pecker? But wide !!!!!!!
It was 15 kc or wider, with peaks about every 7 kc.
It seemed to be comming from a heading of 045 degrees.
I am in the Pennsylvania area...Russian???
JohnB
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K3JVB
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« Reply #1 on: April 19, 2006, 09:32:19 AM »

about 18.170 to 18.144 Weird !
very !

I pointed the beam, and keyed the mike a few times it seemed to fade, and stop??
Any ideas??
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K3JVB
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« Reply #2 on: April 19, 2006, 09:42:50 AM »

woops, make that 18.130 to 18.144
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KC8VWM
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« Reply #3 on: April 19, 2006, 12:04:19 PM »


Geomagnetic or Ionosperic disturbance?
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K3JVB
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« Reply #4 on: April 19, 2006, 01:29:23 PM »

maybe?
But it seemed to be a steady wood pecker effect for about 5 minutes. Then I hit it with a(700watt)carrier and spelt out QRZ'D in Cw , and it kinda went away ! At that time the band was crappy though...very few signals could be heard. And none through that interference, it was S-9 plus.
...just another Ham radio mystery !!! LOL
73
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K3JVB
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« Reply #5 on: April 19, 2006, 01:30:06 PM »

maybe?
But it seemed to be a steady wood pecker effect for about 5 minutes. Then I hit it with a(700watt)carrier and spelt out QRZ'D in Cw , and it kinda went away ! At that time the band was crappy though...very few signals could be heard. And none through that interference, it was S-9 plus.
...just another Ham radio mystery !!! LOL
73
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K7UNZ
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« Reply #6 on: April 19, 2006, 05:06:14 PM »

This has been going on for many months, and not only on 17 meters.  I regularly hear it anywhere from 40 meters up, but usually it's a daytime thing.  Big signal, about 20-30 kHz wide, and strong.

My personal opinion, from the sound of it, is that it's a kind of radar mapping system, badly tuned.

17 meters does seem to be it's favorite....

Jim/k7unz

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K3JVB
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« Reply #7 on: April 19, 2006, 06:10:22 PM »

I have heard it on 40m but never 17. Seemed not to like a signal back at it? But , I am sure we will hear it again...
73
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KC8VWM
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« Reply #8 on: April 19, 2006, 08:33:11 PM »


Does it sound like any of these transmissions?

"Over-The-Horizon Radar"

http://www.wunclub.com/sounds/othr1.wav

..this?

"SELSCAN (US govt)"

http://www.wunclub.com/sounds/selscan.wav

...this?

"Link-11 Network (NATO mil)"

http://www.wunclub.com/sounds/link11.wav

..or this?

"HAARP - High-frequency Active Auroral Research Program"

http://www.wunclub.com/sounds/haarp.wav
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KC8VWM
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« Reply #9 on: April 19, 2006, 08:41:13 PM »

Other similar OTH Radar sounds

1. http://www.iarums-r1.org/iarums/sound/80m.wav

2. http://www.iarums-r1.org/iarums/sound/7615-ocean.wav

3. http://www.iarums-r1.org/iarums/sound/18120oth25.wav

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KC8VWM
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« Reply #10 on: April 19, 2006, 08:42:41 PM »

"Russian Woodpecker"

http://www.iarums-r1.org/iarums/sound/14190rus.wav
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K8AC
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« Reply #11 on: April 21, 2006, 06:10:18 AM »

On 4/20, I was calling a 9V station around 18.134 when the racket started.  It was S9 here in NC and thought it was of local origin, but then the 9V said he was going to QRT because the radar started up and he could no longer hear anyone.  My Timewave DSP 9+ did a nice job of silencing the noise, but of course the strength of the signal made it impossible to conduct a QSO on that part of the band.  A noise blanker designed to minimize the old woodpecker QRM had no affect, although the signal did sound a lot like the woodpecker.
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OD5ZZ
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« Reply #12 on: November 11, 2013, 12:29:30 AM »

Hi

I have the same noise in Lebanon , and it is loud , if you like i can send you a video of what the noise sounds , it is affecting other frequencies and yes for me it is in the Russian direction the peak on SSB 18.172
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