I have just 'taken delivery' of a big Heathkit Analog Computer.. not the small EC-1.. the big 15 opamp job. The docs that are with it are just the operaor's guide. I therefore will begin a search for the assembly manual and possibly any theory of operation manuals, circuit diagrams, program set-ups, etc. I think these are not too plentiful, but I will perform due diligence and see if Heath can be of any help. Many times they still have old manuals around and will copy them (for a fee). In the meantime, if anyone on The List has any info pertaining to this computer, it would help me get it back on the air. Finally... a computer that glows in the dark... 2 K3WL D00DZ!!! Cheers John