Heath H-1 analog computer

[Charlie Carothers]

On 3/6/2011 3:40 PM, Dave McGuire wrote:
>
> Hey folks! I'm giggling like a little girl here, so I just wanted to
> share. :) Recently I was lucky enough to acquire a Heath H-1 analog
> computer from a very cool guy named Norman in Maine. My lady and I drove
> up there to pick it up. It's...just plain awesome.
>
> I've just finished putting together a page about it here, with pictures:
>
> http://www.neurotica.com/wiki/Heath_H-1_Analog_Computer
>
> -Dave
>
Wow, congratulations, that is awesome!!!  About 100 years ago I 
assembled a different (I'd guess later) model Heathkit analog computer 
for the physics department where I attended college.  OK, it wasn't 
quite 100 years - roughly 1960 - which does make it about 50 years.  It 
was all enclosed, and I think had fewer op amps, though it too was all 
tubes (a 12AX7 or maybe a 12AU7 per op amp as I recall).  Just from 
reading the description, the one I assembled had nowhere near the 
precision of yours.

When you get into it, I'd *really* like to hear how you deal with the 
bit of rust inside.  I've done some reading on the internet about the 
remedies for rust, and I'd love to get some additional input on that.
Later,
Charlie C.