A subject that was touched on in Phantom Circuit #51 (and which is alluded to in some of the music which has cropped up in other shows) was numbers stations, those mysterious shortwave radio broadcasts consisting of lists of numbers being read out for unknown purposes (although espionage is the standard explanation). These transmissions are not heard as readily now as they were in the 1980s, but have sustained currency in electronic music.
Here’s a short report on numbers stations. Notwithstanding the silly preamble in the studio before the report itself starts, it’s a concise introduction to the subject at just over three minutes.
Examples of numbers stations abound. Most famously the Conet Project compiled many such recordings, which can now also be downloaded for free.


The mirroring effects in Ian Emes’s short film 