ftp://ftp.funet.fi/.m/mirrors1/rtfm.mit.edu/pub/usenet-by-hierarchy/rec/radio/  direct

[DIR]info/  direct  1000+ twin directories
[DIR]info/  direct  1000+ twin directories
[DIR]scanner/  direct  113 twin directories
[DIR]swap/  direct  72 twin directories
[DIR]amateur/  direct  10 twin directories
[DIR]broadcasting/  direct  32 twin directories
[DIR]shortwave/  direct  5 twin directories
[DIR]shortwave/  direct  5 twin directories
[DIR]noncomm/  direct  5 twin directories