A "scientifically designed device based on sound cybernetic feedback principles."
This ad for the "Cybernator" was plucked off a bulletin board on the campus of Foothill College in Los Altos Hills, CA in 1976 or 1977.
Over the years, it had been folded and has faded some, so a bit of effort was made to "clean up" this electronic reproduction.
Just in case you are using Lynx and can't see the picture (which would be too bad, as it's hard to describe this interesting-looking device) the text is reproduced below:
Cybernator
Cybernetic Communicator
The Cybernator is a scientifically designed device based on sound cybernetic feedback principles.
It is intended for use by:
Suffice it to say, being several decades later, it is not likely that this offer is still valid.
Did this device work? Who knows?