Yep. I remember the Woodpecker too. It really made a mess of the 40
meter ham band.
_ _ . . . . . . _ _ . ... _ _ . _ .
Chuck McCown wrote:
I remember the woodpecker. Have not been on HF in years. Need to get a QRP
rig and do some CW.
----- Original Message -----
From: "jp" <j...@saucer.midcoast.com>
To: "WISPA General List" <wireless@wispa.org>
Sent: Friday, December 19, 2008 8:37 AM
Subject: Re: [WISPA] Fw: [TowerTalk] Some spectacular views of
theabandonedRussian Woodpecker antenna array
Looks like a bigger version of the 8-bay UHF television antenna I just
ordered for OTA HD service.
On Fri, Dec 19, 2008 at 06:33:25AM -0800, Marlon K. Schafer wrote:
Hmmmm, wonder how far we could shoot a wifi signal with one of these?
grin
marlon
This gigantic antenna system called Duga-3 is located near Prypiat
in the Chernobyl area. It was built in the 70's as an early missile
detection system (over-the-horizon radar system). It was also
called the Steel Yard hence its distinctive appearance. The antenna
was deactivated in 1989.
The Russian Woodpecker was a notorious Soviet signal that could be
heard on the shortwave radio bands worldwide between July 1976 and
December 1989. It sounded like a sharp, repetitive tapping noise, at
10 Hz, giving rise to the "Woodpecker" name. The random frequency
disrupted legitimate broadcast, amateur radio, and utility
transmissions and resulted in thousands of complaints by many
countries worldwide.
Starting in 1976 a new and powerful radio signal was detected
worldwide, and quickly dubbed the Woodpecker by amateur radio
operators. Transmission power on some woodpecker transmitters was
estimated to be as high as 10 MW EIRP. As well as disrupting
shortwave amateur radio and broadcasting it could sometimes be heard
over telephone circuits due to the strength of the signals. This
led to a thriving industry of "Woodpecker filters" and noise
blankers.
http://www.artificialowl.net/2008/12/abandoned-giant-duga-3-system-antenna.html
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