[Spooks] numbers from Andrews

[Dan Malloy]

Hello Spooks,
    This afternoon I heard an unusual numbers station.  It was a YL, but I don't think she was a computer voice or recording.  I think it was live in progress at 2238 on 13200 USB with phonetic letters and numbers after about every fifth letter.  She had a few messages like this and at 2240: "This is Andrews, out."
Anyone else hear anything like this?
DE Dan, KA1RDZ