Wednesday, 3 January 2018

The Russian Woodpecker

quote [ Anyone who listened to shortwave radio or was a ham radio operator from the mid 1970s to the late 1980s will be familiar with a sharp, repetitive “rat tat tat tat” noise that permeated the airwaves disrupting communications and television signals the world over. ]

A woodpecker pecks till he gets his fill
[SFW] [history] [+4 laz0r]
[by ScoobySnacks@2:56amGMT]


electric guppy said @ 5:24am GMT on 3rd Jan [Score:3 Informative]
That thing was highly annoying. Maybe 2-3 pecks per second. ISTR that by 1980 it was common knowledge among radio types that the signal was for over-the-horizon radar.

For you non-radio folks, the frequency range given in the article (HF 3-30 MHz) has the useful property of being refracted by the ionosphere back to earth over long (beyond the 40-mile horizon) distances. Higher frequencies refract less. Sunlight and other less regular radiation from the sun influences the amount of refraction, so the optimum frequency for a given distance varies (thus the woodpecker tended to wander across the dial).

Great photos of the antennas.
robotroadkill said @ 5:13pm GMT on 3rd Jan
Every time I visit this link from my phone I get pop-up virus scams that make it totally unreadable (I have to close the browser tabs to do anything). I find it happens on other sites too, but usually they're clickbait sites I don't really care about. It's the something I can do about this from my phone, or does the website just allow shitty scam advertisers?
raphael_the_turtle said @ 5:07pm GMT on 4th Jan
Shitty scam advertisers most likely. I run into that a lot on my phone.
robotroadkill said[1] @ 5:55pm GMT on 4th Jan
Ok thanks. The same websites are fine from my computer so I wasn't sure.
raphael_the_turtle said @ 6:42pm GMT on 4th Jan
Same here. Are you running an ad blocker on your computer too?
robotroadkill said @ 9:01pm GMT on 4th Jan
No. I've been thinking about it though.

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