Your Heatkkit EC-1 analog computer

Brian Reilly brian.reilly.19 at
Wed Jul 31 18:43:27 CDT 2019

I found the ComDyna GP-6 manual online, a classic unit back in its day,
still useful as a design & features reference, I think.

On Mon, Jul 29, 2019 at 8:50 PM Randy Dawson <rdawson16 at> wrote:

> Hi Jeff,
> I have hundreds of crystals here for you, and built a crystal tester (Jim
> Williams app note)
> AN12 - Circuit Techniques for Clock Sources
> <>
> 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
> 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

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