[Theodores]

Never mind The Pip, The Woodpecker is far more interesting:

https://vimeo.com/ondemand/therussianwoodpecker

https://en.wikipedia.org/wiki/The_Russian_Woodpecker

[lgas]

There are lots of things more interesting than The Pip, but they're unrelated. Is there some connection between the Pip and the Russian Woodpecker that I'm missing?

[brbsix]

"The Duga systems were extremely powerful, over 10 MW in some cases, and broadcast in the shortwave radio bands. They appeared without warning, sounding like a sharp, repetitive tapping noise at 10 Hz, which led to it being nicknamed by shortwave listeners the Russian Woodpecker."

https://en.wikipedia.org/wiki/Duga_radar

http://www.brogers.dsl.pipex.com/Wpecker5.html

[prawn]

Maybe this bit? "potential connection to a Soviet Cold War-era structure, the Duga over-the-horizon radio antenna"