On 23-4-2009 16:33, Invisible wrote:
> Tor Olav Kristensen wrote:
>> Invisible wrote:
>> ...
>>> My first instinct is "how the hell do you compute signal correlation 
>>> without a computer?" but now I'm thinking maybe you can do it with 
>>> some op-amps.
>> ...
>>
>> http://google.com/search?&q=(analog+OR+analogue)+computer
> 
> Oh my God, check it out:
> 
> http://en.wikipedia.org/wiki/File:AKAT-1.JPG
> 
> Funkalishous, baby!
> 
We had one that filled one wall of the room at our practical instruction 
lab (beginning 1980's). With a patch panel of 4 by 2 meters or so. It 
used to be a section of an even larger one used for ship behaviour 
simulation. We got it as a gift when they converted to digital computers.

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