NBC Radio Monitor

"Monitor" was a weekly show that would run all weekend on the NBC radio network, featuring everything under the sun: music, comedy, news, talk... it was a potpurri, and it was cancelled just a few months shy of its 20th anniversary.  Oh well.  The bizarre and terrifying Monitor "beacon" is available here, the only place I've found them online.  And for some reason, Teddy Phillips recorded the theme song at one point.

And as a bonus, you can hear the CBS news sounder (which is still used on CBS radio stations).