Here's a better link:

https://www.rferl.org/a/mystery-numbers-station-persian-sign...

BBC, Deutsche Welle, and Radio Free Europe/Radio Liberty, Radio Free Asia, Sound of Hope etcetc actually setup special stations around the soviet bloc countries in an action that could viewed as equally clandestine as the jammers that were trying to silence them.

Given the connection with a one-time pad, I wonder why the article refers to the technique as "cryptology". Wouldn't "cryptography" be the correct term, given the security afforded by a one-time pad is unmatched?

One needs to be wearing The Verdant Ring of Ciphered Arithmetic to understand what's going on.

Sir should get a copy of the Conet Project....

...five CD's full of numbers station recordings. Just what every post-raver needs. I believe they are available for free download from archive.org and others.

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