ES-400 ANALOG COMPUTER SEARCH (THE BIG ONE)

[Neil Morrison]

Yes. dmonroe at PHOTOT.COM sent a color picture of one. To me, they all
more or less look the same. I know some were square, some sloped, but
I never took that much notice of them or the differences.

I suspect most were junked which is what happened to most old digital
computers also. I remember my last year at college being offered
their old mainframe (an Elliot 503) if I would haul it away.

Neil

----- Original Message -----
From: <wa7zze at juno.com>


> Neil,
>
> You may be thinking of the EC-1, another Heath analog computer that
was (relatively speaking) fairly common. It was a box the same size
as the TX-1, RX-1, et al.
>
> The ES-400 is a much larger device with a broad, sloping front
panel, and two or three rows of vacuum tubes on the top. See attached
photo.
>
> Along with the O-1 scope, this is a product I have never seen --
and I've been looking a long time.

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