Heathkit Analog Computer info?

From: Doug Coward <dcoward_at_pressstart.com>
Date: Tue Aug 24 15:25:33 1999

Dave Dameron said:
>Is this the one with 12AU7 (ECC82) twin triode amplifiers? (Or does the
>EC-1 use them also?) I might have some partial schematics...
>Cool.
>-Dave

 In the manual I have each amplifier has a 12AX7 and a 6BQ7A twin triode
plus a 6BH6.

> What do you want for a copy of the Operations guide? The one I
>have coming (the owner forgot to pack it) may or may not be complete.

I'm sure we can work something out. I've being searching for a first
born child (boy or girl) for a completely unrelated hobby. OR you
could just keep me up to date on your music experiments. Keep in
mind that this Operations Manual has theory but no example programs.
It's the EC-1 Operations Manual that has the example programs.

 A good source for magazine articles on analog computers is the
American Journal of Physics. Including one article on replacing
the Heath ES-201 amplifiers with 741 op-amps. They have a searchable
index on the web. And I found the issues at the S.F. Public Library
(other libraries may differ).
 Other magazine called "Simulation" in their Febuary 1997 issue had
an article on simulating an analog computer in Excel. Which looks like
a great way to "single step" your program before moving to the computer.
(See Windows does have a use) :)

> My 'real world' use for this machine is to participate in the
>production of what might be termed "chaos music", and other sounds
>that could be produced when the output of the computer is applied to
>the inputs of an analog synthesiser.

 Speaking of computer music generated by old machines, if you don't
already have a copy, I recommend "Music by Computer", John Wiley and
Sons, 1969, 139 pages. This book was started from papers submitted to
the "Computers in Music" session at the 1966 Fall Joint Computer
Conference in San Francisco.
  In a pocket in the back cover is four 7" floppy records with a total
of 8 sides, containing examples of computer generated music and sounds
samples to accompany each paper.

> To those who asked for pictures.. as soon as I have time I will
>put up a few, as well as some print advertising for it and an
>article in a Popular Electronics I found describing it.

I don't think I've seen this article. (hint) :)
Regards,
--Doug
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Doug Coward
Press Start Inc.
Sunnyvale,CA
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Received on Tue Aug 24 1999 - 15:25:33 BST