The Bode circuit was developed long before the advent of Cable TV to control fluctuations in long runs of twisted pair telephone by a person named Bode, and to this day since he patented it, his folks recieve royalties on it. Not a bad little chuck of change if one thinks of the number of AGC controlled amps out there!
This is CABL.com posting #79865. Tiny Link: cabl.co/muWj