Congratulations Dave.
I have only seen one up close - one time.
About 15 years ago I did get ahold of most ot the manuals from the heathkit
manual replacement service, all except the es-600 function generator manual.
I still have not found a reason it is called the HC-1. I just call it the
Heath Electronic Analog Computer Model ES-400, because es-400 is the model for
the cabinet kit.
I have a magazine cover about the Heath Analog Computer at
http://www.cowardstereoview.com/analog/readlist.htm
I've envious, Good Luck with it.
--Doug Coward Poulsbo, WA
The new home of the
Analog Museum and History Center is
http://www.cowardstereoview.com/analog