Your Heatkkit EC-1 analog computer

[Randy Dawson]

Hi Jeff,
I have hundreds of crystals here for you, and built a crystal tester (Jim Williams app note)
https://www.analog.com/media/en/technical-documentation/application-notes/an12fa.pdf
AN12 - Circuit Techniques for Clock Sources<https://www.analog.com/media/en/technical-documentation/application-notes/an12fa.pdf>
Application Note 12 AN12-3 an12fa Figures 4a and 4b use another comparator based approach. In Figure 4a, the LT1016 comparator is set up with DC
www.analog.com
Brian and I are keen on making a new analog computer, possibly a kit.  All new things, like the Analog Devices multipliers, better op amps etc, and possibly a USB, MIDI interface.
Let us know how you come along on your bringup of the EC-1.
The Heath manuals are the best in analog computing, on actual hardware.
Randy